RRC ID 50539
Author Le QV, Isbell LA, Matsumoto J, Le VQ, Nishimaru H, Hori E, Maior RS, Tomaz C, Ono T, Nishijo H.
Title Snakes elicit earlier, and monkey faces, later, gamma oscillations in macaque pulvinar neurons.
Journal Sci Rep
Abstract Gamma oscillations (30-80 Hz) have been suggested to be involved in feedforward visual information processing, and might play an important role in detecting snakes as predators of primates. In the present study, we analyzed gamma oscillations of pulvinar neurons in the monkeys during a delayed non-matching to sample task, in which monkeys were required to discriminate 4 categories of visual stimuli (snakes, monkey faces, monkey hands and simple geometrical patterns). Gamma oscillations of pulvinar neuronal activity were analyzed in three phases around the stimulus onset (Pre-stimulus: 500 ms before stimulus onset; Early: 0-200 ms after stimulus onset; and Late: 300-500 ms after stimulus onset). The results showed significant increases in mean strength of gamma oscillations in the Early phase for snakes and the Late phase for monkey faces, but no significant differences in ratios and frequencies of gamma oscillations among the 3 phases. The different periods of stronger gamma oscillations provide neurophysiological evidence that is consistent with other studies indicating that primates can detect snakes very rapidly and also cue in to faces for information. Our results are suggestive of different roles of gamma oscillations in the pulvinar: feedforward processing for images of snakes and cortico-pulvinar-cortical integration for images of faces.
Volume 6
Pages 20595
Published 2016-2-8
DOI 10.1038/srep20595
PII srep20595
PMID 26854087
PMC PMC4744932
MeSH Animals Electrophysiological Phenomena Female Macaca Male Neurons / physiology* Photic Stimulation Reaction Time Visual Perception
IF 4.011
Times Cited 18
Japanese macaques