• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2003 Fiscal Year Final Research Report Summary

Coordinate frames for neuronal activities in the supplementary motor area, the premotor area and the primary motor cortex.

Research Project

Project/Area Number 14580784
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 神経・脳内生理学
Research InstitutionTohoku University

Principal Investigator

KAKEI Shinji  Tohoku University, Graduate School of Life Sciences, Associate Prof., 大学院・生命科学研究科, 助教授 (40224365)

Project Period (FY) 2002 – 2003
Keywordsthe supplementary motor area / the premotor area / the primary motor cortex / coodinate transformation / monkye / neuron redording / coordinate system
Research Abstract

We recorded the activity of neurons in primary motor cortex (Ml) and ventral premotor cortex (PMv) in a monkey trained to perform a task which dissociates three major coordinate frames of wrist movement: muscle, wrist joint, and an extrinsic coordinate frame. We found three major types of neurons in Ml and PMv. The first type was termed "extrinsic-like." The activity of these neurons appeared to encode the direction of movement in space independent of the patterns of wrist muscle activity or joint movement that produced the movements. The second type was termed "extrinsic-like with gain modulation". The activity of these neurons appeared to encode the direction of movement in space, but the magnitude (gain) of neuronal activity depended on the posture of the forearm. The third type was termed "muscle-like" since their activity co-varied with muscle activity. The great majority of the directionally-tuned neurons in the PMv were classified as "extrinsic-like" (48/59, 81 %). A smaller group was classified as "extrinsic-like with gain modulation" (7/59, 12%). In Ml, the three types of neurons were more equally represented. Our results raise the possibility that cortical processing between Ml and PMv may contribute to a sensorimotor transformation between extrinsic and intrinsic coordinate frames. Recent modeling studies have demonstrated the computational plausibility of such a process.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 筧 慎治: "運動野における運動指令の座標変換"脳の科学. 24. 381-384 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Kakei, D.S.Hoffman, P.L.Strick: "Sensorimotor transformations in cortical motor areas."Neuroscience Research. 46. 1-10 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Sugiuch, S.Kakei, Y.Izawa, Y.Shinoda: "Functional synergies of neck muscles determined by branching patterns of single long descending motor tract axons."Progress in Brain research. 143. 403-413 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 飯島敏夫, 筧慎治, 広瀬秀顕: "超高速光イメージングが明らかにする運動野における神経集団活動の動的変化"脳の科学. 25. 61-70 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 那, 筧, 伊澤, 篠田: "視床[神経科学の基礎と臨床IX]"ブレーン出版. 158 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.kakei.: "Coordinate transformations in the primary motor cortex."No no Kagaku. 24. 381-384 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.kakei, D.S.Hoffman, P.L.Strick: "Sensorimotor transformations in cortical motor areas."Neuroscience Research. 46. 1-10 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Sugiuchi, S.Kakei, Y.Izawa, Y.Shinoda.: "Functional synergies of neck muscles determined by branching patterns of single long descending motor tract axons."Progress in Brain Research. 143. 403-413 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Iijima, S.Kakei, H.Hirose.: "Dynamics of activities of neuronal population revealed by the ultra-fast optical imaging technique."No no Kagaku. 25. 61-70 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] J.Na, S.kakei, Y.Izawa, Y.Shinoda.: "The Thalamus"Brain Syuppan. 158 (2002)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2005-04-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi