A quantitative analysis of the structure and the receptive field properties of the early visual system
Project/Area Number |
24500460
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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 |
Neurophysiology and muscle physiology
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Research Institution | Osaka University |
Principal Investigator |
SATO HIROMICHI 大阪大学, 医学(系)研究科(研究院), 教授 (50154092)
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Co-Investigator(Renkei-kenkyūsha) |
SAWAI Hjime. 大阪大学, 大学院医学系研究科, 准教授 (20202103)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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Keywords | 初期視覚系 / 刺激文脈依存的反応修飾 / 網膜神経節細胞 / 外側膝状体 / 一次視覚野 / 古典的受容野 / 受容野周囲抑制 / 刺激特徴選択性 / 視覚系 / 受容野 / 文脈依存的反応修飾 / ネコ / 活動相互相関解析 / 刺激方位 / 空間周波数 |
Outline of Final Research Achievements |
The response magnitudes of neurons in the early visual system, i.e., retina-LGN-V1, is modulated according to the figural-properties of visual stimuli within and outside the receptive field (contextual modulation). To clarify the circuit mechanism of the contextual modulation, I conducted electrophysiological analysis using anesthetized cats. The results are summarized as follows; 1)The contextual modulation started from the retina and became stronger in the further stages. 2) In the neural circuit showing a functional connection, exhibiting the firing correlation, neurons in the different processing stages shared similar stimulus-tuning properties for the modulation. And, 3) The results so far suggested both bottom-up and top-down mechanisms.
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Report
(4 results)
Research Products
(32 results)
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[Journal Article] Spatiotemporal characteristics of surround suppression in the primary visual cortex and the lateral genicualte nucleus of cat.2014
Author(s)
Shimegi, S., Ishikawa, A., Kida, H., Sakamoto, H., Hara, S.-I. and Sato, H.
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Journal Title
Journal of Neurophysiology
Volume: 112
Pages: 603-619
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Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Effects of stimulus spatial frequency, size, and luminance contrast on orientation tuning of neurons in the dorsal lateral geniculate nucleus of cat.2013
Author(s)
Naito, T., Okamoto, M., Sadakane, O., Shimegi, S., Osaki, H., Hara, S. I., Kimura, A., Ishikawa, A., Suematsu, N., & Sato, H.
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Journal Title
Neuroscience Research
Volume: 77
Issue: 3
Pages: 143-154
DOI
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Peer Reviewed
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[Presentation] The neural representation of brightness and its temporal dynamics in the cat primary visual cortex2013
Author(s)
himegi, Soma, S., Suematsu, N., Kimura, A., Sato, A., Yoshioka, D. and Sato, H.
Organizer
Society for Neuroscience
Place of Presentation
San Diego, USA
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