Long-wavelength (reddish) hues induce unusually large gamma oscillations in the primate primary visual cortex.

ABSTRACT: Gamma oscillations (∼30-80 Hz) are a prominent signature of electrophysiological signals, with a purported role in natural vision. Previous studies in the primary visual cortex (area V1) have shown that achromatic gratings or gabor stimuli generate salient gamma oscillations, whose strength and frequency depend on stimulus properties such as their size, contrast, and orientation. Surprisingly, although natural images are rarely achromatic, the effect of chromatic input on gamma has not been thoroughly investigated. Recording from primate V1, we show that gamma oscillations of extremely high magnitude (peak increase of ∼300-fold in some cases), far exceeding the gamma generated by optimally tuned achromatic gratings, are induced in the local field potentials by full-field color stimuli of d

SUBMITTER: Shirhatti V 

PROVIDER: S-EPMC5924890 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature