CiNet/FBS/BPE/視覚科学フォーラム セミナー
"Neural correlates of contextual modulation in visual motion perception"
「運動知覚のコンテクスト効果」
Dr. Hiromasa Takemura（竹村浩昌）
Department of Psychology, Stanford University, USA
日時：2013年3月26日（火） 15:00~17:00
場所：CiNet棟１階 大会議室（Ａ）
## Map and directions: http://www.fbs.osaka-u.ac.jp/eng/general/suita.php （CiNet Building is right next to the Nanobiology Building [Blue Circle #2] in the map）
Abstract:
A physically stationary stimulus appears to move in the direction opposite to surrounding motion (induced motion; Duncker 1929). We examined the neural correlates of induced motion by using fMRI for humans. During the fMRI experiment, we presented visual stimuli, which were composed of a central Gabor patch surrounded by an annulus filled with a translating random-dot pattern (inducer) and examined how the activation changes depending on the perception of central stimuli. We found that human MT complex (hMT+) exhibited the pattern of activation, which was closely matched to the perception of induced motion. The compatibility with induced motion was most pronounced in hMT+, as compared with early visual areas. The present results suggest that the hMT+ may be a neural correlate of induced motion perception and play an important role in contrasting motion signals in relation to their surrounding context and adaptively modulating our motion perception depending on the spatial context. At the end, I would like to briefly describe the preliminary findings in my ongoing project at Stanford, which examines the white matter pathway in the human visual cortex by using diffusion-weighted imaging.
Dr. Hiromasa Takemura (竹村浩昌) received his Ph,D. from Tokyo University under Prof. Ikuya Murakami. He is currently working with Prof. Brian Wandell at Stanford University.
主催：脳情報通信融合研究センター（CiNet）
共催：生命機能研究科、視覚科学フォーラム、基礎工学部生物工学
世話人：大澤五住
"Neural correlates of contextual modulation in visual motion perception"
「運動知覚のコンテクスト効果」
Dr. Hiromasa Takemura（竹村浩昌）
Department of Psychology, Stanford University, USA
日時：2013年3月26日（火） 15:00~17:00
場所：CiNet棟１階 大会議室（Ａ）
## Map and directions: http://www.fbs.osaka-u.ac.jp/eng/general/suita.php （CiNet Building is right next to the Nanobiology Building [Blue Circle #2] in the map）
Abstract:
A physically stationary stimulus appears to move in the direction opposite to surrounding motion (induced motion; Duncker 1929). We examined the neural correlates of induced motion by using fMRI for humans. During the fMRI experiment, we presented visual stimuli, which were composed of a central Gabor patch surrounded by an annulus filled with a translating random-dot pattern (inducer) and examined how the activation changes depending on the perception of central stimuli. We found that human MT complex (hMT+) exhibited the pattern of activation, which was closely matched to the perception of induced motion. The compatibility with induced motion was most pronounced in hMT+, as compared with early visual areas. The present results suggest that the hMT+ may be a neural correlate of induced motion perception and play an important role in contrasting motion signals in relation to their surrounding context and adaptively modulating our motion perception depending on the spatial context. At the end, I would like to briefly describe the preliminary findings in my ongoing project at Stanford, which examines the white matter pathway in the human visual cortex by using diffusion-weighted imaging.
Dr. Hiromasa Takemura (竹村浩昌) received his Ph,D. from Tokyo University under Prof. Ikuya Murakami. He is currently working with Prof. Brian Wandell at Stanford University.
主催：脳情報通信融合研究センター（CiNet）
共催：生命機能研究科、視覚科学フォーラム、基礎工学部生物工学
世話人：大澤五住