Interactions between binocular disparity and size tuning in the macaque area V4 (original) (raw)

IEICE technical report. Neurocomputing, 2008

Abstract

The perceived size of an object remains relatively stable despite changes in the size of retinal images accompanying changes in distance from the observer. In this perceptual phenomenon (size constancy), the brain uses distance information for calibrating the perceived size. Binocular disparity provides a clue about distance. To examine interaction between binocular disparity and stimulus size information, we recorded neuronal responses in the macaque cortical are V4. Half of V4 cells showed significant interaction between the tunings for binocular disparity and size. This behavior of V4 cells was consistent with psychophysical performance of human observers. The results suggest that V4 cells contribute to size constancy. Keyword Monkey, Visual area, Binocular disparity, Size perception, Size constancy 1. 背景 1.1. 大きさ恒常性 ある物体までの距離が変化すると、その物体の網膜 投影像の大きさは変化する。しかし、ヒトはその物体 の大きさが一定であると知覚できる。この心理現象は 大きさ恒常性と呼ばれる [1]。物体の物理的な大きさを 知覚するためには、その物体が与える網膜投影像の大 きさに加え、物体までの距離が必要である。脳は物体 までの距離と、網膜投影像の...

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