研究者詳細 - 藤井　進也

論文 - 藤井　進也

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Perceived Vibrato and the Singing Power Ratio Explain Overall Evaluations in Opera Singing

Kondo, H., Kondoh, S., & Fujii, S.

PsyArXiv （arXiv） 2025年02月

共著, 責任著者

In opera singing competitions, judges use an overall score to evaluate the singers’ voices and determine their rankings. This score not only guides the singers’ technique and expressiveness, but also serves as a crucial indicator that can significantly influence their careers. However, the specific elements captured by this overall score remain unclear. To address this gap, the present study analyzed opera singing recordings to identify factors that explain the overall score. Ten trained female Japanese singers performed “Caro mio ben” under standardized recording conditions. Four experts evaluated the recorded performances by assigning an overall score of 100 points and rating six vocal attributes: vibrato, resonance, timbre, diction, intonation, and expressiveness. The recordings were then analyzed to calculate the acoustic features, including the singing power ratio (SPR), harmonic-to-noise ratio, and sound pressure level. We developed two linear mixed models: the first regressed the overall score on the subjective vocal attributes, whereas the second predicted the overall score from the acoustic features. Evaluator identity was included as a random effect in both models. The results showed that vibrato was a significant predictor of the overall score in the first model. In the second model, only SPR emerged as a significant predictor. These findings suggest that vibrato, which reflects emotional expressiveness and vocal control, and SPR, which indicates the relative power in the high-frequency band (2–4 kHz) and signifies a voice clearer than the accompaniment, are key factors in explaining the overall score in opera singing.

Enhanced subjective performance achievement in wind instrument playing through positive memory recall: Effects of sympathetic activation and emotional valence

Watanabe, A., Kondoh, S., Samma, T., & Fujii, S.

bioRxiv 2024年12月

最終著者, 責任著者

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Decreased prefrontal glutamatergic function is associated with a reduced astrocyte-related gene expression in treatment-resistant depression

Wada, M., Nakajima, S., Honda, S., Takano, M., Taniguchi, K., Homma, S., Ueda, R., Tobari, Y., Mimura, Y., Fujii, S., Mimura, M., & Noda, Y.

Translational Psychiatry （Springer Nature） 14 （ 1 ） 2024年11月

研究論文（学術雑誌）, 共著, 査読有り

Glutamatergic dysfunction is involved in the pathophysiology of treatment-resistant depression (TRD). However, few physiological studies have evaluated its pathophysiology in vivo in individuals with TRD. Transcranial magnetic stimulation-electroencephalography (TMS-EEG) techniques can assess intracortical facilitation (ICF), which reflects glutamatergic neurophysiological function in specific cortical regions. The objectives of this study were (1) to compare glutamatergic receptor-mediated function as indexed with ICF TMS-EEG in the dorsolateral prefrontal cortex (DLPFC) between participants with TRD and healthy controls (HCs) and (2) to explore the relationships between cell-specific gene expression levels and the group difference in glutamatergic neural propagation using virtual histology approach. Sixty participants with TRD and thirty HCs were examined with ICF TMS-EEG measure (80 single-pulse TMS and paired-pulse ICF) in the left DLPFC. Both sensor and source-level ICF measures were computed to compare them between the TRD and HC groups. Furthermore, we conducted spatial correlation analyses interregionally between ICF glutamatergic activity and cell-specific gene expression levels employing the Allen Human Brain Atlas dataset. DLPFC-ICF at the sensor level was not significantly different between the two groups, whereas DLPFC-ICF at the source level was reduced in the TRD group compared with the HC group (p = 0.026). Moreover, the reduced ICF signal propagation of TRD correlated with astrocyte-specific gene expression level (p < 0.0001). The glutamatergic neural activities indexed by ICF in the left DLPFC were decreased in participants with TRD. Additionally, a relative reduction in glutamatergic signal propagation originating from the DLPFC in TRD may be associated with astrocytic abnormality.

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A chill brain-music interface for enhancing music chills with personalized playlists

Kondoh, S., Etani, T., Sakakibara, Y., Naruse, Y., Imamura, Y., Ibaraki, T., & Fujii, S.

bioRxiv 2024年11月

研究論文（学術雑誌）, 共著, 最終著者, 責任著者

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A Nostalgia Brain-Music Interface for Enhancing Nostalgia, Well-Being, and Memory Vividness in Young and Elderly Individuals

Sakakibara, Y., Kusutomi, T., Kondoh, S., Etani, T., Shimada, S., Imamura, Y., Naruse, Y., Fujii, S., & Ibaraki, T.

bioRxiv 2024年10月

研究論文（学術雑誌）, 共著, 責任著者

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Lower-limb muscle synergies in musician’s dystonia: A case study of a drummer

Sata, S., Honda, K., Yamaguchi, S., Komine, M., Kim, S., Kashino, M., Hagio, S., & Fujii, S.

Frontiers in Neurology （Frontiers） 2024年10月

研究論文（学術雑誌）, 共著, 最終著者, 責任著者, 査読有り

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Lower-limb muscle synergies in musician’s dystonia: A case study of a drummer

Sata, S., Honda, K., Yamaguchi, S., Komine, M., Kim, S., Kashino, M., Hagio, S., & Fujii, S.

bioRxiv 2024年09月

研究論文（学術雑誌）, 共著, 最終著者, 責任著者

Drumming performance and underlying muscle activities in a professional rock drummer with lower-limb dystonia: a case study

Honda, K., Sata, S., Komine, M., Yamaguchi, S., Kim, S., Kashino, M., & Fujii, S.

Frontiers in Neurology （Frontiers） 2024年08月

研究論文（学術雑誌）, 共著, 最終著者, 責任著者, 査読有り

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Oscillations create groove: A reservoir model for learning complex drumming performances

Kawai, Y., Fujii, S., Asada, M.

bioRxiv 2024年07月

研究論文（学術雑誌）, 共著, 最終著者, 責任著者

Musical performances, particularly drumming, intricately balance rhythmic patterns and creative expression, all heavily influenced by the concept of 'groove'. This study explored how the brain learns and internalizes complex rhythms and grooves from a computational perspective. The cerebellum and basal ganglia play key roles in rhythm perception, production, and timing. We utilized an oscillation-driven reservoir computing model, which is a simplified recurrent neural network designed for timing learning, to acquire complex rhythms. The model was trained to replicate the drumming style of Jeff Porcaro by learning his hi-hat patterns. Analyses revealed that the model's outputs, including fluctuations in interbeat timings and amplitudes, were similar to the original drumming. Next, it was trained to generate multidimensional drum kit performances for various genres (funk, jazz, samba, and rock). Model outputs had timing deviation and audio features related to a sense of groove, similar to the original performances. By incorporating the oscillations of multiple frequencies into the reservoir, the model reproduced fluctuations of timing intervals (microtiming) and amplitudes, as well as audio features of each musical genre. Our results indicated that oscillation-driven reservoir computing can successfully replicate the timing and rhythmic complexity of professional drumming, suggesting that it is a common computational principle for motor timing and rhythm generation. Furthermore, this approach offers insights into the neural underpinnings of musical groove, shedding light on how the brain processes and reproduces intricate rhythmic patterns.

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Globally, songs and instrumental melodies are slower and higher and use more stable pitches than speech: A Registered Report

Ozaki, Y., Tierney, A., Pfordresher, P. Q., McBride, J. M., Benetos, E., Proutskova, P., Chiba, G., Liu, F., Jacoby, N., Purdy, S. C., Opondo, P., Fitch, W. T., Hegde, S., Rocamora, M., Thorne, R., Nweke, F., Sadaphal, D. P., Sadaphal, P. M., Hadavi, S., Fujii, S., … Savage, P. E.

Science Advances （AAAS） 10 （ 20 ） eadm9797 2024年05月

研究論文（学術雑誌）, 共著, 査読有り

Both music and language are found in all known human societies, yet no studies have compared similarities and differences between song, speech, and instrumental music on a global scale. In this Registered Report, we analyzed two global datasets: (i) 300 annotated audio recordings representing matched sets of traditional songs, recited lyrics, conversational speech, and instrumental melodies from our 75 coauthors speaking 55 languages; and (ii) 418 previously published adult-directed song and speech recordings from 209 individuals speaking 16 languages. Of our six preregistered predictions, five were strongly supported: Relative to speech, songs use (i) higher pitch, (ii) slower temporal rate, and (iii) more stable pitches, while both songs and speech used similar (iv) pitch interval size and (v) timbral brightness. Exploratory analyses suggest that features vary along a “musi-linguistic” continuum when including instrumental melodies and recited lyrics. Our study provides strong empirical evidence of cross-cultural regularities in music and speech.

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Drumming Performance and Underlying Muscle Activities in a Professional Rock Drummer with Lower-Limb Dystonia: A Case Study

Kazuaki Honda, Shizuka Sata, Mizuki Komine, Satoshi Yamaguchi, SungHyek Kim, Makio Kashino, Shinya Fujii

bioRxiv 2024年03月

単著, 最終著者, 責任著者

Task-specific focal dystonia (TSFD), characterized by the loss of fine motor control and coordination, affects drummers’ lower-limb movements, yet it remains relatively understudied, leaving a gap in understanding its effects on drumming performance and underlying muscle activities. This study explores lower limb dystonia’s impact on drumming performance and underlying muscle activity in a professional rock drummer. The drummer executed an eight-beat pattern on a drum kit, emphasizing kicking the bass drum on the initial beat and performing syncopation of the third beat. Dystonia symptoms primarily manifested in the initial beat, with fewer symptoms on syncopation of the third beat. Analysis revealed decreased bass-drum sound peak amplitude during the initial beat and increased (becoming more negative) synchronization error. Electromyographic (EMG) measurements of ten muscles in the affected right lower limb showed significant changes in the Biceps Femoris (BF), Tibialis Anterior (TA), Extensor Digitorum Longus (EDL), and Extensor Digitorum Brevis (EDB) muscles during symptom onset. Notably, we observed 1) earlier overactivation of the TA and EDL muscles during the leg lift-up motion or preparatory phase of pedaling, 2) reduced activation of the EDB muscle, and 3) increased activation of the BF muscle during the final pedaling movement when symptoms occurred. These findings suggest that lower-limb dystonia symptoms are characterized by a reduction in amplitude and an increase in synchronization error, potentially due to premature overactivation of the ankle dorsiflexor muscles.

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Commonality and variation in mental representations of music revealed by a cross-cultural comparison of rhythm priors in 15 countries

Jacoby, N., Polak, R., Grahn, J. A., Cameron, D. J., Lee, K. M., Godoy, R., Undurraga, E. A., Huanca, T., Thalwitzer, T., Doumbia, N., Goldberg, D., Margulis, E. H., Wong, P. C. M., Jure, L., Rocamora, M., Fujii, S., Savage, P. E., Ajimi, J., Konno, R., … McDermott, J. H.

Nature Human Behaviour （Springer Nature） 2024年03月

研究論文（学術雑誌）, 共著, 査読有り

Music is present in every known society but varies from place to place. What, if anything, is universal to music cognition? We measured a signature of mental representations of rhythm in 39 participant groups in 15 countries, spanning urban societies and Indigenous populations. Listeners reproduced random ‘seed’ rhythms; their reproductions were fed back as the stimulus (as in the game of ‘telephone’), such that their biases (the prior) could be estimated from the distribution of reproductions. Every tested group showed a sparse prior with peaks at integer-ratio rhythms. However, the importance of different integer ratios varied across groups, often reflecting local musical practices. Our results suggest a common feature of music cognition: discrete rhythm ‘categories’ at small-integer ratios. These discrete representations plausibly stabilize musical systems in the face of cultural transmission but interact with culture-specific traditions to yield the diversity that is evident when mental representations are probed across many cultures.

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Short-Term Effect of Auditory Stimulation on Neural Activities: A Scoping Review of Longitudinal Electroencephalography and Magnetoencephalography Studies

Kobayashi, K., Shiba, Y., Honda, S., Nakajima, S., Fujii, S., Mimura, M., Noda, Y.

Brain Sciences 14 （ 2 ） 2024年01月

研究論文（学術雑誌）, 共著, 査読有り

A review of psychological and neuroscientific research on musical groove

Etani T., Miura A., Kawase S., Fujii S., Keller P. E., Vuust P., & Kudo K.

Neuroscience and Biobehavioral Reviews （Elsevier） 158 2024年01月

研究論文（学術雑誌）, 共著, 査読有り

When listening to music, we naturally move our bodies rhythmically to the beat, which can be pleasurable and difficult to resist. This pleasurable sensation of wanting to move the body to music has been called "groove." Following pioneering humanities research, psychological and neuroscientific studies have provided insights on associated musical features, behavioral responses, phenomenological aspects, and brain structural and functional correlates of the groove experience. Groove research has advanced the field of music science and more generally informed our understanding of bidirectional links between perception and action, and the role of the motor system in prediction. Activity in motor and reward-related brain networks during music listening is associated with the groove experience, and this neural activity is linked to temporal prediction and learning. This article reviews research on groove as a psychological phenomenon with neurophysiological correlates that link musical rhythm perception, sensorimotor prediction, and reward processing. Promising future research directions range from elucidating specific neural mechanisms to exploring clinical applications and socio-cultural implications of groove.

The Japanese Version of the Barcelona Music Reward Questionnaire (J-BMRQConfirms the Cross-Cultural Generalizability of the “Five-Factor” Model.

Honda S., Herrero E. M., Isoda M., Muraki M., Seva U. L., Kitayama Y., Savage P. E., Fujii, S.

bioRxiv 2023年12月

研究論文（学術雑誌）, 共著, 最終著者, 責任著者

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Relationship between autistic traits and letter-recognition under attention to face-likeness: study using a henohenomoheji-type compound stimulus

Sugiyama M., Fujii S., & Mori M

Scientific Reports （Springer Nature） 13 （ 1 ） 1 - 12 2023年11月

研究論文（学術雑誌）, 共著, 査読有り

This study aimed to clarify the relationship between autistic traits and letter information processing, specifically, the components of faces when attention is paid to face-like information. We created a new “henohenomoheji-type compound stimulus,” in which letters are placed in positions in such a way as to resemble a face. In Experiment 1, we examined the relationship between autistic traits and the participants’ performance in a letter-recognition task in which a henohenomoheji-type compound stimulus was used. The results showed a significant moderate negative correlation between Autism-Spectrum Quotient-Japanese Version (AQ-J) scores and letter-recognition sensitivity when the compound stimuli were arranged like a face. The letter-detection task was employed in Experiment 2 to examine how autistic traits affect tasks' performance with a lower cognitive load than in Experiment 1. We found no correlation between AQ-J scores and letter-detection sensitivity with or without face-like features. These results suggest that paying attention to faces reduces the participants’ performance in letter recognition, which represents a higher cognitive load in individuals with higher autistic traits. A major implication of this study is that the henohenomoheji-type compound stimuli can be applied to several cognitive tasks, such as cognitive processing in individuals with autistic traits.

Perceptual and automated estimates of infringement in 40 music copyright cases

Yuan Y., Cronin C., Müllensiefen D., Fujii S., & Savage P. E.

Transactions of the International Society for Music Information Retrieval （Ubiquity Press） 6 （ 1 ） 117 - 134 2023年10月

研究論文（学術雑誌）, 共著, 査読有り

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Cross-cultural Perception of Musical Similarity Within and Between India and Japan

Daikoku H., Shimozono T., Fujii S., Hegde S., & Savage P. E.

Music & Science （Sage Journals） 6 1 - 16 2023年10月

研究論文（学術雑誌）, 共著, 査読有り

Bimanual finger coordination in professional and amateur darbuka players

Honda K. and Fujii S

Experimental Brain Research （Springer Link） 2023年09月

研究論文（学術雑誌）, 共著, 最終著者, 査読有り

Professional hand percussionists who play the darbuka (a drum from the Middle East) show fast and stable bimanual finger coordination compared to amateur players. A cross-recurrence quantification analysis clarifies how stable bimanual coordination is achieved by dissociating stochastic noise and attractor strength in the dynamic system. This study employed a cross-recurrence quantification analysis to examine professional and amateur darbuka players’ fast and stable bimanual finger coordination. Eight professional and eight amateur percussion players participated in the study and played a darbuka with their right and left ring fingers, alternating as fast as possible for 12 s. We then analyzed the finger position data and calculated the stochastic noise and attractor strength from the density and the longest diagonal line in the recurrence plot, respectively. We used linear mixed-effects models to test whether stochastic noise and attractor strength differed between professional and amateur players. The results indicate that professional darbuka players achieve fast and stable bimanual finger coordination by enhancing attractor strength rather than reducing stochastic noise in the dynamic system.

Glutamatergic neurometabolite levels in the caudate are associated with the ability of rhythm production

Honda S., Noda Y., Matsushita K., Tarumi R., Nomiyama N., Tsugawa S., Tobari Y., Hondo N., Saito K., Mimura M., Fujii S., Nakajima S.

Frontiers in Neuroscience （Frontiers） 17 2023年08月

研究論文（学術雑誌）, 共著, 責任著者, 査読有り

Sight vs. Sound Judgments of Music Performance Depend on Relative Performer Quality: Cross-cultural Evidence From Classical Piano and Tsugaru Shamisen Competitions

Chiba G., Ozaki Y., Fujii S., & Savage P. E.

Collabra: Psychology, 9(1), 2023. 9 （ 1 ） 2023年05月

研究論文（学術雑誌）, 査読有り

Skin Cold Stimulation Can Modulate the Perceptual Rating of Musical Chords

Ishikawa, Y., Konno, R., Fujii, S., Nakatani, M.

IEEE Transactions on Haptics 2023年05月

研究論文（学術雑誌）, 共著, 査読有り

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Impaired mismatch negativity reflects the inability to perceive beat interval in patients with schizophrenia

Takahashi Y., Fujii S., Osakabe Y., Hoshino H., Konno R., Kakamu T., Fukushima T., Matsumoto T., Yoshida K., Aoki S., Kanno K., Oi N., Ueda Y., Suzutani K., Sato A., Mori Y., Wada T., Shiga T., Itagaki S., Miura I., & Yabe H

Schizophrenia Research （Elsevier） 254 40 - 41 2023年02月

研究論文（学術雑誌）, 共著, 査読有り

Decrease in gamma-band auditory steady-state response in patients with treatment-resistant schizophrenia

Ogyu K., Matsushita K., Honda S., Wada M., Tamura S., Takenouchi K., Tobari Y., Kusudo K., Kato H., Koizumi T., Arai N., Koreki A., Matsui M., Uchida H., Fujii S., Onaya M., Hirano Y., Mimura M., Nakajima S., & Noda Y.

Schizophrenia Research （Elsevier） 252 129 - 137 2023年01月

研究論文（学術雑誌）, 共著, 査読有り

Music rhythm perception and production relate to treatment response in schizophrenia

Honda S., Matsushita K., Noda Y., Tarumi R., Nomiyama N., Tsugawa S., Nakajima S., Mimura M., & Fujii S.

Schizophrenia Research （Elsevier） 252 69 - 76 2023年01月

研究論文（学術雑誌）, 共著, 最終著者, 責任著者, 査読有り

Towards a cross-cultural framework for predictive coding of music

Savage P. E., & Fujii S.

Nature Reviews Neuroscience （Springer Nature） 2022年08月

研究論文（学術雑誌）, 共著, 最終著者, 査読有り

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Transition between individually different and common features in skilled drumming movements

Takiyama K., Hirashima M., & Fujii S

Frontiers in Sports and Active Living （Frontiers） 4 2022年07月

研究論文（学術雑誌）, 共著, 最終著者, 査読有り

Why do professional athletes and musicians exhibit individually different motion patterns? For example, baseball pitchers generate various pitching forms, e.g., variable wind-up, cocking, and follow-through forms. However, they commonly rotate their wrists and fingers at increasingly high speeds via shoulder and trunk motions. Despite the universality of common and individually different motion patterns in skilled movements, the abovementioned question remains unanswered. Here, we focus on a motion required to hit a snare drum, including the indirect phase of task achievement (i.e., the early movement and mid-flight phases) and the direct phase of task achievement (i.e., the hit phase). We apply tensor decomposition to collected kinematic data for the drum-hitting motion, enabling us to decompose high-dimensional and time-varying motion data into individually different and common movement patterns. As a result, individually different motion patterns emerge during the indirect phase of task achievement, and common motion patterns are evident in the direct phase of task achievement. Athletes and musicians are thus possibly allowed to perform individually different motion patterns during the indirect phase of task achievement. Additionally, they are required to exhibit common patterns during the direct phase of task achievement.

Tapping Performance of Professional and Amateur Darbuka Players

Honda K. and Fujii S

Frontiers in Psychology （Frontiers） 13 （ 861821 ） 2022年06月

研究論文（学術雑誌）, 共著, 最終著者, 査読有り

Motor learning is a process whereby the acquisition of new skills occurs with practice, and can be influenced by the provision of feedback. An important question is what frequency of feedback facilitates motor learning. The guidance hypothesis assumes that the provision of less augmented feedback is better than more because a learner can use his/her own inherent feedback. However, it is unclear whether this hypothesis holds true for all types of augmented feedback, including for example sonified information about performance. Thus, we aimed to test what frequency of augmented sonified feedback facilitates the motor learning of a novel joint coordination pattern. Twenty healthy volunteers first reached to a target with their arm (baseline phase). We manipulated this baseline kinematic data for each individual to create a novel target joint coordination pattern. Participants then practiced to learn the novel target joint coordination pattern, receiving either feedback on every trial i.e., 100% feedback (n = 10), or every other trial, i.e., 50% feedback (n = 10; acquisition phase). We created a sonification system to provide the feedback. This feedback was a pure tone that varied in intensity in proportion to the error of the performed joint coordination relative to the target pattern. Thus, the auditory feedback contained information about performance in real-time (i.e., “concurrent, knowledge of performance feedback”). Participants performed the novel joint coordination pattern with no-feedback immediately after the acquisition phase (immediate retention phase), and on the next day (delayed retention phase). The root-mean squared error (RMSE) and variable error (VE) of joint coordination were significantly reduced during the acquisition phase in both 100 and 50% feedback groups. There was no significant difference in VE between the groups at immediate and delayed retention phases. However, at both these retention phases, the 100% feedback group showed significantly smaller RMSE than the 50% group. Thus, contrary to the guidance hypothesis, our findings suggest that the provision of more, concurrent knowledge of performance auditory feedback during the acquisition of a novel joint coordination pattern, may result in better skill retention.

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Anticipatory regulation of cardiovascular system on emergence of auditory-motor interaction in young infants

Shinya Y., Oku K., Watanabe H., Taga G., Fujii S

Experimental Brain Research （Springer） 240 1661 - 1671 2022年05月

研究論文（学術雑誌）, 最終著者, 査読有り

Humans develop auditory-motor interaction to produce a variety of rhythmic sounds using body movements, which are often produced and amplified with tools, such as drumming. The extended production of sounds allows us to express a wide range of emotions, accompanied by physiological changes. According to previous studies, even young infants enhance movements in response to auditory feedback. However, their exhibition of physiological adaptation on the emergence of auditory-motor interaction is unclear. We investigated the movement and cardiac changes associated with auditory feedback to spontaneous limb movements in 3-month-old infants. The results showed that infants increased the frequency of limb movements inducing auditory feedback, while they exhibited a more regular rhythm of the limb movements. Furthermore, heart rate increase associated with the limb movement was first inhibited immediately after the timing of the auditory feedback, which may reflect sustained attention to the auditory stimuli. Then, through auditory-motor experience, the heart rate increase was inhibited even prior to the auditory feedback, leading to suppression of the peak intensity of the heart rate increase. These findings suggest that young infants regulate the cardiovascular system as well as limb movements in anticipation of the auditory feedback. The anticipatory regulation associated with movement and attentional changes may contribute to reduced cardiovascular stress in auditory-motor interaction, and provide a developmental basis for more sophisticated goal-directed behavior of producing rhythmic sounds.

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Anticipatory regulation of cardiovascular system on emergence of auditory-motor interaction in young infants

Shinya Y., Oku K., Watanabe H., Taga G., Fujii S

bioRxiv 2022年03月

研究論文（学術雑誌）, 最終著者

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Sight vs. sound in the judgment of music performance: Cross-cultural evidence from classical piano and Tsugaru shamisen competitions [Stage 1 Registered Report]

Chiba G., Ozaki Y., Fujii S., & Savage P. E.

Peer Community In Registered Reports 2022年

Agreement among human and automated transcriptions of global songs

Ozaki Y., McBride J., Benetos E., Pfordresher P., Six J., Tierney A. T., Proutskova P., Sakai E., Kondo H., Fukatsu H., Fujii, S., & Savage P. E.

Proceedings of the 22nd International Conference on Music Information Retrieval (ISMIR 2021) （ISMIR） 500 - 508 2021年

研究論文（国際会議プロシーディングス）, 共著, 査読有り

Frontostriatal Structural Connectivity and Striatal Glutamatergic Levels in Treatment-Resistant Schizophrenia: An Integrative Analysis of DTI and 1H-MRS

Ochi R., Tarumi R., Noda Y., Tsugawa S., Plitman E., Wada M., Honda S., Matsushita K., Chakravarty M.M., Graff-Guerrero A., Fujii S., Matsui M., Uchida H., Mimura M, Nakajima S.

Schizophrenia Bulletin Open （Oxford Academic） 1 （ 1 ） 2020年10月

研究論文（学術雑誌）, 共著, 査読有り

Given that approximately one-third of patients with schizophrenia do not respond to antipsychotics, different neurobiological bases may underlie treatment resistance in schizophrenia. Previous studies showed that treatment response is associated with both frontostriatal connectivity and glutamatergic neurometabolite levels in the caudate in patients with schizophrenia, which leads to the hypothesis that the relationship between them may be altered, specifically in patients with treatment-resistant schizophrenia (TRS). Employing analyses of covariance and subsequent partial correlation analyses, we compared the relationship between glutamate+glutamine (Glx) levels in the caudate and fractional anisotropy (FA) values in the tract between the dorsolateral prefrontal cortex and caudate in 19 patients with TRS, 20 patients responsive to first-line antipsychotics (FL-Resp), and 19 healthy controls (HCs). TRS was defined by severe positive symptomatology despite first-line antipsychotic treatment. Patients with TRS had lower FA values in the bilateral frontostriatal tracts than patients with FL-Resp and HCs (P < .001), while no group differences were found in caudate Glx levels. There was a significant frontostriatal FA value-by-group interaction on caudate Glx levels (F = 7.37, P = .009). Frontostriatal FA values positively correlated with caudate Glx levels in HCs (r = −.55, P = .028), while they were negatively associated with caudate Glx levels in the TRS group (r = .53, P = .043). Furthermore, in the FL-Resp group, frontostriatal FA values did not significantly correlated with caudate Glx levels. The altered relationship between white matter integrity and the glutamate system in the frontostriatal circuit in the TRS group may reflect the pathophysiology underlying treatment response/resistance in schizophrenia.

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Perceptual vs. automated judgments of music copyright infringement

Yuan Y., Oishi S., Cronin C., Müllensiefen D., Atkinson Q. D., Fujii S., Savage P. E.

Proceedings of the 21st International Society for Music Information Retrieval Conference (ISMIR 2020) （ISMIR） 23 - 29 2020年10月

研究論文（国際会議プロシーディングス）, 共著, 査読有り

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Resting-state isolated effective connectivity of the cingulate cortex as a neurophysiological biomarker in patients with severe treatment-resistant schizophrenia

Wada M., Nakajima S., Tarumi R., Masuda F., Miyazaki T., Tsugawa S., Ogyu K., Honda S., Matsushita K., Kikuchi Y., Fujii S., Blumberger D.M., Daskalakis Z.J., Mimura M., Noda Y.

Journal of Personalized Medicine （Journal of Personalized Medicine） 10 （ 3 ） 1 - 12 2020年08月

研究論文（学術雑誌）, 査読有り

Background: The neural basis of treatment-resistant schizophrenia (TRS) remains unclear. Previous neuroimaging studies suggest that aberrant connectivity between the anterior cingulate cortex (ACC) and default mode network (DMN) may play a key role in the pathophysiology of TRS. Thus, we aimed to examine the connectivity between the ACC and posterior cingulate cortex (PCC), a hub of the DMN, computing isolated effective coherence (iCoh), which represents causal effective connectivity. Methods: Resting-state electroencephalogram with 19 channels was acquired from seventeen patients with TRS and thirty patients with non-TRS (nTRS). The iCoh values between the PCC and ACC were calculated using sLORETA software. We conducted four-way analyses of variance (ANOVAs) for iCoh values with group as a between-subject factor and frequency, directionality, and laterality as within-subject factors and post-hoc independent t-tests. Results: The ANOVA and post-hoc t-tests for the iCoh ratio of directionality from PCC to ACC showed significant findings in delta (t = 7.659, p = 0.008) and theta (t = 8.066, p = 0.007) bands in the left side (TRS < nTRS). Conclusion: Left delta and theta PCC and ACC iCoh ratio may represent a neurophysiological basis of TRS. Given the preliminary nature of this study, these results warrant further study to confirm the importance of iCoh as a clinical indicator for treatment-resistance. 45 45

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Thalamic and striato-pallidal volumes in schizophrenia patients and individuals at risk for psychosis: A multi-atlas segmentation study

Takahashi T., Tsugawa S., Nakajima S., Plitman E., Chakravarty M.M., Masuda F., Wada M., Kurose S., Ochi R., Matsushita K., Sasabayashi D., Nakamura M., Nishikawa Y., Takayanagi Y., Nishiyama S., Higuchi Y., Mizukami Y., Furuichi A., Kido M., Hashimoto R., Noguchi K., Fujii S., Mimura M., Noda Y., Suzuki M.

Schizophrenia Research （Elsevier） 243 268 - 275 2020年05月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 09209964

Despite previous neuroimaging studies demonstrating morphological abnormalities of the thalamus and other subcortical structures in patients with schizophrenia, the potential role of the thalamus and its subdivisions in the pathophysiology of this illness remains elusive. It is also unclear whether similar changes of these structures occur in individuals at high risk for psychosis. In this study, magnetic resonance imaging was employed with the Multiple Automatically Generated Templates (MAGeT) brain segmentation algorithm to determine volumes of the thalamic subdivisions, the striatum (caudate, putamen, and nucleus accumbens), and the globus pallidus in 62 patients with schizophrenia, 38 individuals with an at-risk mental state (ARMS) [4 of whom (10.5%) subsequently developed schizophrenia], and 61 healthy subjects. Cognitive function of the patients was assessed by using the Brief Assessment of Cognition in Schizophrenia (BACS) and the Schizophrenia Cognition Rating Scale (SCoRS). Thalamic volume (particularly the medial dorsal and ventral lateral nuclei) was smaller in the schizophrenia group than the ARMS and control groups, while there were no differences for the striatum and globus pallidus. In the schizophrenia group, the reduction of thalamic ventral lateral nucleus volume was significantly associated with lower BACS score. The pallidal volume was positively correlated with the dose of antipsychotic treatment in the schizophrenia group. These results suggest that patients with schizophrenia, but not those with ARMS, exhibit volume reduction in specific thalamic subdivisions, which may underlie core clinical features of this illness.

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Using Non-Negative Matrix Factorization to Examine Treatment Resistance and Response in Patients With Schizophrenia: A Multimodal Imaging Study

Plitman Eric, Ochi Ryo, Patel Raihaan, Tsugawa Sakiko, Tarumi Ryosuke, Honda Shiori, Matsushita Karin, Fujii Shinya, Uchida Hiroyuki, Mimura Masaru, Noda Yoshihiro, Devenyi Gabriel A., Nakajima Shinichiro, Chakravarty Mallar

BIOLOGICAL PSYCHIATRY 87 （ 9 ） S350 - S350 2020年05月

査読有り, ISSN 0006-3223

Proximal Binaural Sound Can Induce Subjective Frisson

Honda S, Ishikawa Y, Konno R, Imai E, Nomiyama N, Sakurada K, Koumura T, Kondo HM, Furukawa S, Fujii S, Nakatani M

Frontiers in Psychology （Frontiers） 11 （ 316 ） 1 - 11 2020年03月

研究論文（学術雑誌）, 共著, 査読有り

Levels of Glutamatergic Neurometabolites in Patients with Severe Treatment-resistant Schizophrenia: A Proton Magnetic Resonance Spectroscopy Study

Tarumi R, Tsugawa S, Noda Y, Plitman E, Honda S, Matsushita K, Chavez S, Sawada K, Wada M, Matsui M, Fujii S, Miyazaki T, Chakravarty MM, Uchida H, Remington G, Graff-Guerrero A, Mimura M, Nakajima S

Neuropsychopharmacology （Springer Nature） 45 632 - 640 2020年03月

研究論文（学術雑誌）, 共著, 査読有り

Approximately 30% of patients with schizophrenia do not respond to antipsychotics and are thus considered to have treatment-resistant schizophrenia (TRS). To date, only four studies have examined glutamatergic neurometabolite levels using proton magnetic resonance spectroscopy (1H-MRS) in patients with TRS, collectively suggesting that glutamatergic dysfunction may be implicated in the pathophysiology of TRS. Notably, the TRS patient population in these studies had mild-to-moderate illness severity, which is not entirely reflective of what is observed in clinical practice. In this present work, we compared glutamate + glutamine (Glx) levels in the dorsal anterior cingulate cortex (dACC) and caudate among patients with TRS, patients with non-TRS, and healthy controls (HCs), using 3T 1H-MRS (PRESS, TE = 35 ms). TRS criteria were defined by severe positive symptoms (i.e., ≥5 on 2 Positive and Negative Syndrome Scale (PANSS)-positive symptom items or ≥4 on 3 PANSS-positive symptom items), despite standard antipsychotic treatment. A total of 95 participants were included (29 TRS patients [PANSS = 111.2 ± 20.4], 33 non-TRS patients [PANSS = 49.8 ± 13.7], and 33 HCs). dACC Glx levels were higher in the TRS group vs. HCs (group effect: F[2,75] = 4.74, p = 0.011; TRS vs. HCs: p = 0.012). No group differences were identified in the caudate. There were no associations between Glx levels and clinical severity in either patient group. Our results are suggestive of greater heterogeneity in TRS relative to non-TRS with respect to dACC Glx levels, necessitating further research to determine biological subtypes of TRS.

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Wearable Strain Sensor Suit for Infants to Measure Limb Movements under Interaction with Caregiver

Fujii S, Watanabe H, Taga G

Infant Behavior and Development （Elsevier Inc.） 58 （ 101418 ） 1 - 10 2020年02月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 01636383

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White Matter Microstructural Organizations in Patients with Severe Treatment-resistant Schizophrenia: A Diffusion Tensor Imaging Study

Ochi R, Noda Y, Tsuchimoto S, Tarumi R, Honda S, Matsushita K, Tsugawa S, Plitman E, Masuda F, Ogyu K, Wada M, Miyazaki T, Fujii S, Chakravarty MM, Graff-Guerrero A, Uchida H, Mimura M, Nakajima S

Progress in Neuropsychopharmacology & Biological Psychiatry （Elsevier Inc.） 100 （ 109871 ） 109871 - 109871 2020年01月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 0278-5846

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Approach-oriented Coping Strategy Level May be Related to Volume of the Whole Hippocampus in the Elderly

Kida H, Nakajima S, Shikimoto R, Ochi R, Noda Y, Tsugawa S, Fujii S, Takayama M, Mimura M, Niimura H,

Psychiatry and Clinical Neurosciences （John Wiley & Sons, Inc.） 74 （ 4 ） 270 - 276 2020年01月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 13231316

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Automatic acoustic analyses quantify variation in pitch structure within and between human music

Sato S., McBride J. M., Pfordresher P. Q., Tierney A. T., Six J., Fujii S., Savage P. E.

PsyArXiv preprint 2020年

研究論文（その他学術会議資料等）, 共著

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Rhythm, synchrony, and cooperation

Savage P. E., Yamauchi M., Hamaguchi M., Tarr B., Kitayama Y., Fujii S.

PsyArXiv preprint 2020年

研究論文（その他学術会議資料等）, 共著

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Glutamatergic Neurometabolite Levels in Patients With Severe Treatment-Resistant Schizophrenia: A Cross-Sectional 3T Proton Magnetic Resonance Spectroscopy Study

Nakajima Shinichiro, Tsugawa Sakiko, Noda Yoshihiro, Plitman Eric, Honda Shiori, Matsushita Karin, Chavez Sofia, Sawada Kyosuke, Wada Masataka, Matsui Mie, Fujii Shinya, Miyazaki Takahiro, Chakravarty Mallar, Uchida Hiroyuki, Remington Gary, Graff Ariel, Mimura Masaru

NEUROPSYCHOPHARMACOLOGY 44 （ SUPPL 1 ） 471 - 472 2019年12月

査読有り, ISSN 0893-133X

Glutamatergic neurometabolite levels in patients with severe treatment-resistant schizophrenia: A cross-sectional 3t proton magnetic resonance spectroscopy study

Tarumi R., Sakiko T., Noda Y., Plitman E., Honda S., Matsushita K., Chavez S., Sawada K., Wada M., Matsui M., Fujii S., Miyazaki T., Chakravarty M., Uchida H., Remington G., Graff-Guerrero A., Mimura M., Nakajima S.

EUROPEAN NEUROPSYCHOPHARMACOLOGY 29 S279 - S280 2019年12月

ISSN 0924-977X

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Automatic Comparison of Human Music, Speech, and Bird Song Suggests Uniqueness of Human Scales

Kuroyanagi J, Sato S, Ho MJ, Chiba G, Six J, Pfordresher P, Tierney A, Fujii S, Savage PE

Proceedings of the 9th International Workshop on Folk Music Analysis (FMA2019) 35 - 40 2019年07月

研究論文（国際会議プロシーディングス）, 共著, 査読有り

The uniqueness of human music relative to speech and animal song has been extensively debated, but rarely directly measured. We applied an automated scale analysis algorithm to a sample of 86 recordings of human music, human speech, and bird songs from around the world. We found that human music throughout the world uniquely emphasized scales with small-integer frequency ratios, particularly a perfect 5th (3:2 ratio), while human speech and bird song showed no clear evidence of consistent scale-like tunings. We speculate that the uniquely human tendency toward scales with small-integer ratios may relate to the evolution of synchronized group performance among humans.

Automatic Comparison of Global Children’s and Adult Songs Supports a Sensorimotor Hypothesis for the Origin of Musical Scales

Sato S, Six J, Pfordresher P, Fujii S, Savage PE

Proceedings of the 9th International Workshop on Folk Music Analysis (FMA2019) 41 - 46 2019年07月

研究論文（国際会議プロシーディングス）, 査読有り

Music throughout the world varies greatly, yet some musical features like scale structure display striking crosscultural similarities. Are there musical laws or biological constraints that underlie this diversity? The “vocal mistuning” hypothesis proposes that cross-cultural regularities in musical scales arise from imprecision in vocal tuning, while the integer-ratio hypothesis proposes that they arise from perceptual principles based on psychoacoustic consonance. In order to test these hypotheses, we conducted automatic comparative analysis of 100 children’s and adult songs from throughout the world. We found that children’s songs tend to have narrower melodic range, fewer scale degrees, and less precise intonation than adult songs, consistent with motor limitations due to their earlier developmental stage. On the other hand, adult and children’s songs share some common tuning intervals at small-integer ratios, particularly the perfect 5th (~3:2 ratio). These results suggest that some widespread aspects of musical scales may be caused by motor constraints, but also suggest that perceptual preferences for simple integer ratios might contribute to cross-cultural regularities in scale structure. We propose a “sensorimotor hypothesis” to unify these competing theories.

Proximal Binaural Sound Can Induce Subjective Frisson

Honda S, Ishikawa Y, Konno R, Imai E, Nomiyama N, Sakurada K, Koumura T, Kondo HM, Furukawa S, Fujii S, Nakatani M

arXiv （arXiv） 2019年04月

研究論文（学術雑誌）, 共著, 査読有り

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The Thermal Feedback Influencer: Wearable Thermal Display for Enhancing the Experience of Music Listening

Ishikawa Y., Kawazoe A., Chernyshov G., Fujii S., Nakatani M.

Lecture Notes in Electrical Engineering （Lecture Notes in Electrical Engineering） 535 162 - 168 2019年

This paper describes a new wearable thermal display, the Thermal Feedback Influencer, that can provide chilling stimuli to the skin in order to enhance emotional experiences of music listening. We developed a prototype device that can be attached to behind the ear. The device is designed to be small and lightweight enough to be worn comfortably. In this work, we describe basic concepts of this research, preliminary test results, details and evaluation of the developed prototype. We also summarize methods to provide thermal feedback with music and discuss the possible applications and future research plans.

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Upper Rate Limits for One-to-one Auditory-motor Coordination involving Whole-body Oscillation: A Study of Street Dancers and Non-dancers

Miura A., Fujii S., Okano M., Kudo K., Nakazawa K.

Journal of Experimental Biology （The Company of Biologists (United Kingdom)） 221 （ 16 ） jeb179457 - jeb179457 2018年07月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 00220949

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The Cerebellum's Contribution to Beat Interval Discrimination

Paquette S, Fujii S, Li HC, Schlaug G

NeuroImage （Elsevier） 163 （ 163 ） 177 - 182 2017年12月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 1053-8119

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More Feedback Is Better than Less: Learning a Novel Upper Limb Joint Coordination Pattern with Augmented Auditory Feedback

Fujii S, Lulic T, Chen JL

Frontiers in Neuroscience （Frontiers） 10 （ 251 ） 2016年06月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 1662-453X

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The Use of Augmented Auditory Feedback to Improve Arm Reaching in Stroke: A Case Series

Chen JL, Fujii S, Schlaug G

Disability and Rehabilitation （Taylor and Francis） 38 （ 11 ） 1115 - 1124 2016年05月

研究論文（学術雑誌）, 共著, ISSN 0963-8288

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Finger-to-Beat Coordination Skill of Non-Dancers, Street Dancers, and the World Champion of a Street-Dance competition

Miura A, Fujii S, Okano M, Kudo K, Nakazawa K

Frontiers in Psychology （Frontiers） 7 （ 542 ） 2016年

研究論文（学術雑誌）, 共著, 査読有り

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Motor Control of Rhythmic Dance from a Dynamical Systems Perspective: A Review

Miura A, Fujii S, Yamamoto Y, & Kudo K

Journal of Dance Medicine and Science （IngentaConnect） 19 （ 1 ） 11 - 21 2015年

研究論文（学術雑誌）, 共著, 査読有り, ISSN 1089-313X

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Precursors of Dancing and Singing to Music in Three- to Four-Months-Old Infants

Fujii S, Watanabe H, Oohashi H, Hirashima M, Nozaki D, Taga G

PLOS ONE （PUBLIC LIBRARY SCIENCE） 9 （ 5 ） 2014年05月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 1932-6203

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The Role of Rhythm in Speech and Language Rehabilitation: The SEP Hypothesis

Fujii S, Wan CY

Frontiers in Human Neuroscience （Frontiers） 8 （ 777 ） 2014年

研究論文（学術雑誌）, 共著, 査読有り

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The Harvard Beat Assessment Test (H-BAT): a battery for assessing beat perception and production and their dissociation

Fujii S, Schlaug G

Frontiers in Human Neuroscience 7 （ 771 ） 2013年

研究論文（学術雑誌）, 共著, 査読有り

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Spike Shape Analysis of Surface Electromyographic Activity in Wrist Flexor and Extensor Muscles of the World's Fastest Drummer

Fujii S, Moritani T

Neuroscience Letters （Elsevier） 514 （ 2 ） 185 - 188 2012年04月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 0304-3940

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Rise Rate and Timing Variability of Surface Electromyographic Activity during Rhythmic Drumming Movements in the World's Fastest Drummer

Fujii S, Moritani T

Journal of Electromyography and Kinesiology （Elsevier） 22 （ 1 ） 60 - 66 2012年02月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 1050-6411

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Neurophysiological and Dynamical Control Principles Underlying Variable and Stereotyped Movement Patterns During Motor Skill Acquisition

Kazutoshi Kudo, Makoto Miyazaki, Hirofumi Sekiguchi, Hiroshi Kadota, Shinya Fujii, Akito Miura, Michiko Yoshie, Hiroki Nakata

Journal of Advanced Computational Intelligence and Intelligent Informatics （Fuji Technology Press Ltd.） 15 （ 8 ） 942 - 953 2011年10月

査読有り, ISSN 1343-0130

While novices who are unfamiliar to a new motor skill typically show variable and unstable movements, highly skilled experts show a stable and accurate performance. These distinct differences in motor control between experts and novices have led researchers to hypothesize that neuromotor noise is reduced in the process of motor skill acquisition. On the other hand, it should be noted that novices’ movements have other characteristics; they are habituated and stereotyped. In this review, we discuss the principles governing spatiotemporal organization of movements in novices and experts while solving specific motor problems under varied conditions, by introducing experimental and theoretical studies that use neurophysiological techniques such as electromyography, functional magnetic resonance imaging, and transcranial magnetic stimulation, and mathematical models such as stochastic and dynamical models. On the basis of the findings from a variety of perceptual-motor skills (e.g., ballthrowing, badminton smash, long-distance running, piano and drum performance, street dance, a popular hand game of rock-paper-scissors, and temporal order judgement task), we argue that the novices’ characteristic movement patterns were organized under specific constraints and typical strategy, without which the variability would increase even more, while experts’ movements were organized with functional and compensatory variability that can drive out erroneous noise variability. We also showed that in a particular type of interlimb coordination, skilled and unskilled movement patterns could be seamlessly described as the time evolution of nonlinear and self-organized dynamical systems, suggesting that the dynamical systems approach is a major candidate for understanding the principle underlying organization of experts’ and novices’ movements.

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Synchronization Error of Drum Kit Playng with a Metronome at Different Tempi by Professional Drummers

Fujii S, Hirashima M, Kudo K, Ohtsuki T, Nakamura Y, Oda S

Music Perception （University of California Press） 28 （ 1 ） 491 - 503 2011年06月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 0730-7829

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Neurophysiological and Dynamical Control Principles underlying Variable and Stereotyped Movement Patterns during Skill Acquisition

Kudo K, Miyazaki M, Sekiguchi H, Kadota H, Fujii S, Miura A, Yoshie M, & Nakata H

Journal of Advanced Computational Intelligence and Intelligent Informatics （Fuji Technology Press Ltd.） 15 942 - 953 2011年

研究論文（学術雑誌）, 共著, 査読有り

Intrinsic Constraint of Asymmetry Acting as a Control Parameter on Rapid, Rhythmic Bimanual Coordination: A Study of Professional Drummers and Non-drummers

Fujii S, Kudo K, Ohtsuki T, Oda S

Journal of Neurophysiology （American Physiological Society） 104 （ 4 ） 2178 - 2186 2010年10月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 0022-3077

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SPATIOTEMPORAL CHARACTERISTICS OF RHYTHMIC, STATIONARY BASKETBALL BOUNCING IN SKILLED AND UNSKILLED PLAYERS

Yoji Katsuhara, Shinya Fuji, Ryosuke Kametani, Shingo Oda

PERCEPTUAL AND MOTOR SKILLS （AMMONS SCIENTIFIC, LTD） 110 （ 2 ） 469 - 478 2010年04月

査読有り, ISSN 0031-5125

The aim of this study was to investigate the spatiotemporal characteristics of rhythmic, stationary basketball bouncing in skilled and unskilled adult basketball players. Skilled (n=12) and unskilled (n=11) basketball players were asked to bounce a basketball every 700 msec. in as temporally stable and spatially accurate a manner as possible, while keeping their eyes fixed straight ahead. Spatial analyses revealed a lower variability of the ball bouncing point and less deviation from a target point in the performance of skilled players compared to unskilled players. Temporal analyses revealed no significant difference in variability of the interbounce interval in skilled versus unskilled players. However, skilled players had longer and more consistent contact time between hand and ball compared to the unskilled players. These results suggest that longer and more consistent hand contact with the ball play an important role in spatial control of basketball bouncing position.