著者：Mikio Inagaki, Ichiro Fujita
タイトル：Difference in neural representations of face between the temporal cortex and the amygdala in monkeys
発表日：28 Jul., 2009
Neuropsychological and brain imaging studies in human suggest that visual processing of face is carried out by both cortical and subcortical pathways. Here we showed electrophysiological evidence of the difference in face representations between the temporal visual cortex and the amygdala in monkeys. We examined whether face responsive neurons in the temporal cortex and the amygdala are tuned to image-based spatial frequencies (cycles/image), which are relative spatial frequencies referenced by the image size, or retina-based spatial frequencies (cycles/degree), which are absolute spatial frequencies on the retina, by assessing the effects of the image size on tuning. We found most neurons in the temporal cortex and a few neurons in the amygdala were tuned to image-based spatial frequencies, indicating that face representation in the temporal cortex is invariant to retinal image size. The results demonstrate that representations of face differed in their frame of reference for spatial frequencies between the temporal cortex and the amygdala.