https://scholars.lib.ntu.edu.tw/handle/123456789/384989
標題: | Cortical brightness adaptation when darkness and brightness produce different dynamical states in the visual cortex | 作者: | CHUN-I YEH | 關鍵字: | Cortical inhibition; Laminar pattern; Light adaptation | 公開日期: | 2014 | 卷: | 111 | 期: | 3 | 起(迄)頁: | 1210-1215 | 來源出版物: | Proceedings of the National Academy of Sciences of the United States of America | 摘要: | Darkness and brightness are very different perceptually. To understand the neural basis for the visual difference, we studied the dynamical states of populations of neurons in macaque primary visual cortex when a spatially uniform area (8° × 8°) of the visual field alternated between black and white. Darkness evoked sustained nerve-impulse spiking in primary visual cortex neurons, but bright stimuli evoked only a transient response. A peak in the local field potential (LFP) γ band (30-80 Hz) occurred during darkness; white-induced LFP fluctuations were of lower amplitude, peaking at 25 Hz. However, the sustained response to white in the evoked LFP was larger than for black. Together with the results on spiking, the LFP results imply that, throughout the stimulus period, bright fields evoked strong net sustained inhibition. Such cortical brightness adaptation can explain many perceptual phenomena: interocular speeding up of dark adaptation, tonic interocular suppression, and interocular masking. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84892916178&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/384989 |
DOI: | 10.1073/pnas.1314690111/-/DCSupplemental |
顯示於: | 心理學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。