2001 Fiscal Year Final Research Report Summary
Neuronal activity in cortical oculomotor areas during serial search task
| Project/Area Number |
12680791
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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 |
神経・脳内生理学
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| Research Institution | Tohoku University |
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Principal Investigator |
MUSHIAKE Hajime Tohoku university, school of medicine, Dept. Physiology, Associate Professor, 大学院・医学系研究科, 助教授 (80219849)
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| Project Period (FY) |
2000 – 2001
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| Keywords | SEF / SMA / pre-SMA / saccade |
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| Research Abstract |
We analyzed neuronal activity in the supplementary eye field (SEF), supplementary motor area (SMA), and presupplementary motor area (pre-SMA) during the performance of three motor tasks : capturing a visual target with a saccade, reaching one arm to a target while gazing at a visual fixation point, or capturing a target with a saccade and arm-reach together. Our data demonstrated that each area was involved in controlling the arm and eye movements in a different manner. Saccade-related neurons were found mainly in the SEF. In contrast, arm-movement-related neurons were found primarily in the SMA and pre-SMA. In addition, we found that the activity of both arm-movement-related and saccade-related neurons differed, depending on the presence or absence of an accompanying saccade or arm movement. Such context dependency was found in all three areas. We also discovered that activity preceding eye or arm movement alone, and eye and arm movement combined, appeared more often in the pre-SMA and SEF, suggesting that involvement in effector-independent aspects of motor behavior. Subsequent analysis revealed that the laterality of arm representation differed in the three areas : it was predominantly contralateral in the SMA, but largely bilateral in the pre-SMA and SEF.
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Research Products
(4 results)
