| Project/Area Number |
61480111
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Neurophysiology and muscle physiology
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| Research Institution | KYOTO PREFECTURAL SCHOOL OF MEDICINE |
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Principal Investigator |
TOYAMA Keisuke KYOTO PREFECTURAL SCHOOL OF MEDICINE, Professor, 教授 (90090505)
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| Co-Investigator(Kenkyū-buntansha) |
飼原 壽夫 京都府立医科大学, 医学部, 助手 (50194668)
片山 宣 京都府立医科大学, 助手 (30177406)
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| Project Period (FY) |
1986 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1988: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1987: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1986: ¥4,500,000 (Direct Cost: ¥4,500,000)
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| Keywords | VISION / RESPONSE SELECTIVITY / CLARE-BISHOP CORTEX / 3D MOTION PERCEPTION / 反応選択性 / 高次視覚野 / 19野 / 21a野 / PMLS / 運動視差 / 立体視 / 視覚中枢 |
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| Research Abstract |
A three-dimensional (3D) visual stimulator was constructed of a computer, a RAM disk and two high speed CRTs to present visual cues (motion disparity and size change) for perception of 3D motion. Neuronal responsiveness was investigated in Clare-Bishop (CB) cortex of the normal and siamese cats using the 3D stimulator. Normal CB cells were binocularly driven and were optimally activated by single presentation of motion disparity (MD) or combined presentation of MD with size change (SC). Those responsive to single presentation of MD were classified into three response types: 1) Approaching (AP) cells optimally activated by the MD for AP motion, recessive (RC) cells activated by the MD for RC motion, and frontoparallel (FP) cells activated by the MD for FP motion. Those responsive to the combined visual cues included AP and RC responsive to either a combination of the MD for AP motion vs size increase or that of the MD for RC motion vs size decrease.
In siamese cats practically all cells in areas 17-19 were monocularly driven, while numerous binocular cells were found in DB cortex. Correspondingly, CB cortex contained all types of 3D cells responsive to single presentation of MD or combined presentation of MD and SC. Therefore, at least in siamese cats the CB cortex is the first stage that encodes binocular 3D motion signals, and it is likely that the CB cortex is the place for integration of 3D motion signals also in normal cats.
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