Differences in gamma frequencies across visual cortex restrict their possible use in computation.
Differences in gamma frequencies across visual cortex restrict their possible use in computation.
复制标题
DOI:
10.1016/j.neuron.2010.08.004
复制
发表时间:
2010-09-09
期刊:
影响因子:
16.2
通讯作者:
Maunsell, John H. R.
中科院分区:
文献类型:
--
作者:
Ray, Supratim;Maunsell, John H. R.
Neuronal oscillations in the gamma band (30-80 Hz) have been suggested to play a central role in feature binding or establishing channels for neural communication. For these functions, the gamma rhythm frequency must be consistent across neural assemblies encoding the features of a stimulus. Here we test the dependence of gamma frequency on stimulus contrast in V1 cortex of awake behaving macaques and show that gamma frequency increases monotonically with contrast. Changes in stimulus contrast over time leads to a reliable gamma frequency modulation on a fast timescale. Further, large stimuli whose contrast varies across space generate gamma rhythms at significantly different frequencies in simultaneously recorded neuronal assemblies separated by as little as 400 μm, making the gamma rhythm a poor candidate for binding or communication, at least in V1. Instead, our results suggest that the gamma rhythm arises from local interactions between excitation and inhibition.
登录
查看更多内容
影响因子:
5.3
作者:
Heiss, Jaime E.;Katz, Yonatan;Lampl, Ilan
通讯作者:
Lampl, Ilan
影响因子:
25
作者:
Mann EO;Mody I
通讯作者:
Mody I
影响因子:
3.4
作者:
Gieselmann, M. A.;Thiele, A.
通讯作者:
Thiele, A.
影响因子:
3.7
作者:
Friedman-Hill, S;Maldonado, PE;Gray, CM
通讯作者:
Gray, CM
影响因子:
1.2
作者:
Kang K;Shelley M;Henrie JA;Shapley R
通讯作者:
Shapley R