1997 Fiscal Year Final Research Report Summary
A Neurophysiological Study of Roles of Motor Areas in Primate Cortex for Mastication
| Project/Area Number |
07838033
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
咀嚼
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| Research Institution | KYUSHU DENTAL COLLEGE |
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Principal Investigator |
YOSHINO Kenichi Kyushu Dental College, Oral Neuroscience, Assistant Professor, 歯学部, 講師 (90201029)
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| Co-Investigator(Kenkyū-buntansha) |
KUBOTA Kisou Nihon Fukushi University, Social and Information Sciences, Professor, 情報社会科学部, 教授 (30027479)
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| Project Period (FY) |
1995 – 1997
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| Keywords | VISUALLY GUIDED JAW MOVEMENT TASK / PRIMATE / PREMOTOR CORTEX / PRIMARY MOTOR CORTEX / SINGLE NEURONAL ACTIVITY |
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| Research Abstract |
Neuronal activities in the ventral part of the premotor cortex (PMv) and the primary motor cortex (MI) were analyzed during a visually guided jaw movement task. Based on the type of neuronal activity observed, when monkeys closed or opened their mouths in response to a visual stimulus, PMv neurons could be classified into three categories : 1)signal-related neurons, which transiently responded to visual stimuli, 2)movement-related neurons, which were time-locked to Jaw opening and/or jaw closing movements, and 3)set-related neurons which exhibited gradually increasing activities while jaw position was maintained. However, all MI neurons exhibited movement-related activities and responded differently between the closing and opening dynamic phases. These results suggest that PMv neurons may be involved in motor preparation, initiation and control of jaw movements and task behavior based on visual information, and that MI neurons may be involved in controlling jaw movements, especially contraction of the masticatory muscles.
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