2014 Fiscal Year Final Research Report
Spatio-temporal analysis of intrinsic dynamics in cortical activities
Project/Area Number |
24500286
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Sensitivity informatics/Soft computing
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Research Institution | Kyoto Sangyo University |
Principal Investigator |
ITO Hiroyuki 京都産業大学, コンピュータ理工学部, 教授 (80201929)
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Co-Investigator(Kenkyū-buntansha) |
MARUYAMA Yoshiko 京都産業大学, コンピュータ理工学部, 講師 (80723353)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Keywords | 視覚皮質 / 発火数相関 / 時空間活動 / 刺激依存性 / 試行間変動性 / 変動性 |
Outline of Final Research Achievements |
We performed multi-neuron recordings on the cat visual cortex and found that the population mean of the spike count correlation did not necessarily represent the nature of correlated variabilities because the spike count correlation showed significant diversity and heterogeneity. Although the population mean was relatively small (0.06), the correlations of individual unit pairs were distributed over a broad range, extending to both positive and negative values. In most of the recording sessions of local cell populations (83%), significantly positive correlations coexisted with significantly negative ones in different unit pairs. Furthermore, nearly 20% of the unit pairs showed significant variation in the spike count correlation for different stimulus orientations. Diversity, heterogeneity and context dependent variation suggests that the correlated spike count variabilities originate not from fixed anatomical connections but rather from the dynamic interaction of neuronal networks.
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Free Research Field |
神経科学
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