Izawa, Eiichi

写真a

Affiliation

Faculty of Letters, Department of Humanities and Social Science (Human Relations) (Mita)

Position

Professor

Related Websites

Career 【 Display / hide

  • 2002.04
    -
    2004.03

    JSPS doctal research fellow/ Graduate School of Bioagricultural Sciences, Naogya University

  • 2004.04
    -
    2005.12

    JSPS Post-doctal research fellow/ Graduate School of Human relations, Keio University

  • 2006.01
    -
    2008.03

    慶應義塾大学文学研究科 准教授(有期)(魅力ある大学院教育イニシアティブ)

  • 2008.04
    -
    2012.03

    慶應義塾大学社会学研究科 准教授(有期)(人文グローバルCOE”論理と感性に関する先端的教育研究拠点”)

  • 2012.04
    -
    2013.03

    慶應義塾大学 論理と感性のグローバル研究センター, 共同研究員

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Academic Background 【 Display / hide

  • 1999.03

    Nagoya University, School of Science, Department of Physics

    University, Graduated

  • 2003.03

    Nagoya University, Bioagricultural Sciences, Biological Mechanisms and Functions

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • 博士(農学), Nagoya University, Coursework, 2003.03

 

Research Areas 【 Display / hide

  • Experimental psychology (Animal Psychology)

  • Neuroethology

 

Books 【 Display / hide

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Papers 【 Display / hide

  • Different patterns of allopreening in the same-sex and opposite-sex interactions of juvenile large-billed crows (Corvus macrorhynchos)

    MIYAZAWA Eri, SEGUCHI Akiko, TAKAHASHI Nana, MOTAI Ayumi, IZAWA Ei-Ichi

    Ethology 126   195 - 206 2020.02

    Research paper (scientific journal), Joint Work, Accepted

  • Rapid adjustment of pecking trajectory to prism-induced visual shifts in crows as compared to pigeons.

    MATSUI Hiroshi, IZAWA Ei-Ichi

    Journal of Experimental Biology (Journal of Experimental Biology)  222 ( 4 ) jeb182345 2019

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  00220949

     View Summary

    © 2019. Published by The Company of Biologists Ltd Pecking in birds is analogous to reaching and grasping movements in primates. Earlier studies on visuomotor control in birds, which were conducted mostly in pigeons, suggested that avian pecking is controlled feedforwardly, and is out of the control of visual guidance during movement. However, recent studies using crows suggested a role of vision in pecking control during movement. To unveil what visuomotor mechanisms underlie the flexibility of pecking in crows, we examined whether pigeons and crows adjust their pecking to the visual distortion induced by prisms. Because prisms induce visual shifts of object positions, birds were required to adjust their movements. Pecking kinematics were examined before and after attaching prisms in front of the birds' eyes. Analysis of lateral deviation caused by the prisms showed that crows rapidly adjusted their pecking trajectories, but pigeons did so slowly. Angular displacement also increased in pigeons after attachment of the prism, but decreased in crows. These responses to prisms were consistent among individuals in pigeons but varied in crows, though the adjustment of pecking commonly succeeded in crows. These results suggest that pecking in pigeons predominantly involves feedforward control and that the movement is determined depending on the visual information available before the initiation of pecking. In contrast, the results from crows suggest that their pecking trajectories are corrected during the movement, supporting on-line visual control. Our findings provide the first evidence to suggest the on-line visual control of pecking in birds.

  • Control of bill-grasping aperture with varying food size in crows

    Hiroshi MATSUI, Ei-Ichi IZAWA

    NeuroReport (NeuroReport)  30 ( 7 ) 522 - 525 2019

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  09594965

     View Summary

    © 2019 Wolters Kluwer Health, Inc. All rights reserved. Grasping movement in primates is known to be a visually guided behavior and the aperture of hand opening is adjusted to the target size on the basis of visual information. The analogous behavior can be found in birds, called 'pecking', consisting of head-reaching and bill-grasping. Bill-grasping has been investigated mainly in pigeons and an aperture adjustment as seen in primates has been reported. This study focused on kinematics of pecking in crows, known to possess dexterous visuomotor skills, to examine whether crows adjust the grasping aperture to food diameter with a kinematic mechanism similar to that in pigeons. The pecking at a small piece of food was video recorded to analyze the grasping aperture. The results showed that the grasping aperture was proportional to food diameter. Kinematic analysis showed that the aperture adjustment was mediated by grasping velocity and grasping duration, which is consistent with the findings of previous research on pecking in pigeons. However, the relative contribution of grasping velocity was much higher than that of grasping duration. Our findings suggest the different sensorimotor mechanisms to control bill-grasping between the avian species with different foraging ecology.

  • Avian brains: insights from development, behaviors and evolution

    NOMURA Tadashi, IZAWA Ei-Ichi

    Development Growth and Differentiation 59   244 - 257 2017.06

    Research paper (scientific journal), Joint Work, Accepted

  • Flexible motor adjustment of pecking with an artificially extended bill in crows but not in pigeons

    MATSUI Hiroshi, IZAWA Ei-Ichi

    Royal Society Open Science 4   160796 2017

    Research paper (scientific journal), Joint Work, Accepted

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Papers, etc., Registered in KOARA 【 Display / hide

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Reviews, Commentaries, etc. 【 Display / hide

  • Understand the evolution of animal behaviour at the different levels: brain/body anatomy and physiology, and behavioural functions

    Ei-Ichi IZAWA

    Science IMPACT (Science Impact Ltd.)  12   70 - 72 2018

    Introduction and explanation (commerce magazine), Single Work

  • カラスから探る社会認知機能の進化 -知性に大脳“皮質”は必要か?-

    伊澤栄一

    科学 (岩波書店)  79   678 - 681 2009

    Introduction and explanation (commerce magazine), Single Work

  • カラスの脳と行動から探る知性の進化

    伊澤栄一

    脳21 (金芳堂)  10   355 - 359 2007

    Introduction and explanation (commerce magazine), Single Work

Research Projects of Competitive Funds, etc. 【 Display / hide

  • 身体拡張性の比較心理学

    2019.06
    -
    2021.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 伊澤 栄一, Grant-in-Aid for Challenging Research (Exploratory) , Principal Investigator

  • 情動をうみだす脳と身体の協働システムの比較認知神経科学研究

    2017.04
    -
    2020.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 伊澤 栄一, Grant-in-Aid for Scientific Research (B), Principal Investigator

  • Investigating visuomotor control mechanisms in birds.

    2016.04
    -
    2018.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 伊澤 栄一, Grant-in-Aid for Challenging Exploratory Research, Principal Investigator

 

Courses Taught 【 Display / hide

  • INTENSIVE SEMINAR: PSYCHOLOGY 4

    2019

  • INTENSIVE SEMINAR: PSYCHOLOGY 3

    2019

  • INTENSIVE SEMINAR: PSYCHOLOGY 2

    2019

  • INTENSIVE SEMINAR: PSYCHOLOGY 1

    2019

  • GRADUATION THESIS

    2019

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Memberships in Academic Societies 【 Display / hide

  • 日本動物心理学会

     
  • 日本動物行動学会

     
  • 日本鳥学会

     
  • 日本動物学会

     
  • 日本比較生理生化学会

     

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Committee Experiences 【 Display / hide

  • 2014.07
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    Present

    理事, 日本動物心理学会

  • 2016.04
    -
    Present

    科学技術予測センター専門調査員, 文部科学省