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Visual System

開催日 2014/9/13
時間 11:00 - 12:00
会場 Poster / Exhibition(Event Hall B)

Functional organization of facial views within the face selective region in anterior inferotemporal cortex in macaque

  • P3-123
  • Chia-Pei Lin:1,2 Masashi Matsuda:2,4 Takayuki Sato:2 Go Uchida:2 Chou Po Hung:3 Manabu Tanifuji:2,4 
  • 1:Institute of Neuroscience, National Yang-ming University, Taipei, Taiwan 2:Brain Science Institute, Riken, Japan 3:Dep of Neuroscience, Georgetown Uni, USA 4:Dep of Complexity Science and Engineering, The Univ. of Tokyo, Japan 

Face selective sub-regions in macaque inferior temporal (IT) cortex are postulated to be essential for face processing. In a sub-region located at anterior lateral IT cortex, neurons are tuned to particular views of faces. However, the spatial organization of view tuned neurons within this region is not well understood. Previously, optical intrinsic signal imaging (OISI) in anterior lateral IT cortex suggested that face selective neurons were arranged in systematic order with respect to their preferred viewing angles within a columnar region (Wang et al. 1996, 1998). However, because OISI is an indirect measure of neural activity and signal-to-noise ratio is limited, our understanding of the spatial organization within face selective sub-regions is not sufficient. Here, using electrode arrays, we investigated neuronal organization with respect to preferred viewing angles in the face selective sub-region. Consistent with previous OISI studies, preferred viewing angles were systematically mapped within local regions, while neurons in surrounding regions also tuned to particular viewing angles. Modeling of functional maps from the discrete samples of neural responses suggested a broader continuous map of face views beyond a column region similar to orientation map in V1. Furthermore, neurons tuned to a particular viewing angle also responded to its mirror symmetric view, and as a result continuous mapping of viewing angles seems to be also mirror-symmetric.

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