オサキ ヒロノブ
  尾崎 弘展
   所属   医学部 医学科
   職種   助教
論文種別 原著
言語種別 英語
査読の有無 査読あり
表題 Surround suppression by high spatial frequency stimuli in the cat primary visual cortex.
掲載誌名 正式名:The European journal of neuroscience
略  称:Eur J Neurosci
ISSNコード:1460-9568(Electronic)0953-816X(Linking)
巻・号・頁 33(5),923-32頁
著者・共著者 Osaki Hironobu, Naito Tomoyuki, Sadakane Osamu, Okamoto Masahiro, Sato Hiromichi
発行年月 2011/03
概要 Surround suppression is a phenomenon whereby stimulation of the extraclassical receptive field suppressively modulates the visual responses of neurons in the primary visual cortex (V1) (also known as area 17). It is known that surround suppression tunes to spatial frequencies (SFs) that are much lower and broader than the frequencies to which the classical receptive field tunes. In this study, we tested the effects of varying SFs on surround suppression by using a circular sinusoidal grating patch that covered both the classical receptive field and the extraclassical receptive field. Using area-summation tuning curves, we found high-SF-tuned surround suppression in the cat V1. This high-SF-tuned surround suppression causes the SF tuning to shift to low SF for large stimuli. By simulating a model neuron lacking a suppressive surround mechanism, we confirmed that these preferred SF shifts do not occur in the absence of surround suppression. We surmise that the high-SF-tuned suppression, which shifts the preferred SF according to size, functionally contributes to the scale-invariant processing of visual images in V1.
DOI 10.1111/j.1460-9568.2010.07572.x
文献番号 21255126