2009 Fiscal Year Final Research Report
categorization of movements and neural representation of cognitive operations
| Project/Area Number |
19300139
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Neurophysiology and muscle physiology
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| Research Institution | Tohoku University |
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Principal Investigator |
MUSHIAKE Hajime Tohoku University, 大学院・医学系研究科, 教授 (80219849)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 大脳皮質 / 高次機能 / 神経生理学 |
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| Research Abstract |
There are multiple motor areas and prefrontal areas in the frontal cortex. We trained monkeys to perform bimanual sequential tasks. We found that neuronal activity in the lateral prefrontal cortex (LPFC), pre-SMA and SMA were related to action (pronation or supination) or effector (right hand or left hand) and combination of these parameters. Some of these neurons were related to category of actions rather than particular movements. Although neurons representing each category of movemnts were frequently found in these areas, it is of interest that neuronal activity representing individual actions, abundant in medial premotor areas, was not common in the LPFC. Thus, we propose a trend in hierarchical organization of the frontal cortex with respect to the planning of sequential actions : a category of sequences in the LPFC, a sequence of actions in higher motor areas, and a plan of individual actions in the primary motor and premotor cortex. This functional difference implies the generation of neural representations to enable planning of structured event complexes at a conceptual level.
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[Presentation]2009
Author(s)
NAKAJIMA T, HOSAKA R, TANJI J, MUSHIAKE H
Organizer
Activity of putative pyramidal neurons and interneurons in medial motor areas during performance of a memory-guided sequential motor task
Place of Presentation
Chicago USA
Year and Date
2009-10-20
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[Presentation]2008
Author(s)
S. OKUYAMA, H. MUSHIAKE, T. INUI, J. TANJI
Organizer
Flexible behavior in numerosity based operation by monkeys
Place of Presentation
Washington DC USA
Year and Date
2008-11-18
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[Presentation]2008
Author(s)
T. NAKAJIMA, R. HOSAKA, H. MUSHIAKE, J. TANJ
Organizer
Reference frame of action-related neuronal activity in the pre-supplementary motor area
Place of Presentation
Washington DC USA
Year and Date
2008-11-16
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