| Project/Area Number |
02807011
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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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 | Gifu Uniersity. School of Medicine |
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Principal Investigator |
MATSUNAMI Kin'ishi Gifu Univ. School of Medicine・ Professor, 医学部, 教授 (90027491)
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| Co-Investigator(Kenkyū-buntansha) |
KONISHI Tokitaka Gifu Univ. School of Medicine・ Assistant, 医学部, 助手 (40225470)
SATAKE Hirotake Gifu Univ. School of Medicine・ Assistant Professor, 医学部, 講師 (30187158)
KAWASHIMA Takashi Gifu Univ. School of Medicine・ Assistant Professor, 医学部, 講師 (90161314)
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| Project Period (FY) |
1990 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1991: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1990: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Cross Correlation / Auto Correlation / Area 3a / Interhemispheric / Corpus Callosum / Cerebral Cortex / Neuron Activity / Cat |
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| Research Abstract |
Interhemispheric neuronal interaction between two neurons situated respectively in the left and right area 3a of the cat was investigated with cross correlation analysis. Under anesthetized conditions with Ketamin, surgery was appropriately performed to stimulate corpus callosum (CC) and to record unit activity simultaneously from area 3a on both sides. CC stimulation was employed to identify neuronal characteristics on the basis to orthodromic or antidromic response. Cross-, and auto-correlograms were constructed off-line with a mini-computer. A sharp peak was observed in some paired neurons with short latency in the cross correlograph, suggesting a presence of a direct influence (with mono- or at least oligosynaptic nature) from one neuron to the other. Also a presence of inhibition was observed in a similar manner. Third, many neurons changed their firing rate with periodicity about 10 Hz, probably generated in the subcortical structures. Activities of some these neuron pairs discharged in a synchronous manner during some period, but in a dissynchronous manner in other periods, suggesting a presence of switching mechanism for synchronization.
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