Effects of Face Contour and Features on Occipitotemporal Activity when Viewing Eye Movement

DOI Web Site 参考文献5件
  • MIKI Kensaku
    Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan RISTEX, Japan Science and Technology Agency, Chiyoda-ku Tokyo 100-0004, Japan
  • WATANABE Shoko
    Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan
  • HONDA Yukiko
    Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan RISTEX, Japan Science and Technology Agency, Chiyoda-ku Tokyo 100-0004, Japan
  • NAKAMURA Maiko
    Department of Neurology, Jikei University School of Medicine, Minato-ku, Tokyo 105-8461, Japan
  • KAKIGI Ryusuke
    Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan RISTEX, Japan Science and Technology Agency, Chiyoda-ku Tokyo 100-0004, Japan The Graduate University for Advanced Studies, Hayama, Kanagawa 240-0913, Japan Japan Space Forum, Chiyoda-ku, Tokyo 100-0004, Japan

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We investigated whether the activity in MT/V5 is influenced by a face contour and/or features such as the mouth using magnetoencephalography (MEG). We compared two conditions as visual motion stimuli using apparent motion as follows; (1) CDL: A schematic face consisting of a face Contour, two Dots & a horizontal Line and (2) D: Two Dots only. Subjects described a simple movement of dots for D, but eye movement for CDL, though movement modalities were the same through both conditions. We used a single equivalent current dipole (ECD) model between 145-220 ms after stimulus onset and estimated the location, dipole moment (strength) and peak latency. There were no significant differences in the peak latency of the estimated dipoles between each condition, but the activity was significantly stronger for CDL than for D (p < 0.01) in the right and left hemispheres. These results indicated that there is specific information processing for eye movements in the occipitotemporal area, the human MT/V5 homologue, and this activity was significantly influenced by whether movements appeared with the face contour and/or features, in other words, whether the eyes moved or not, even if the movement itself was the same.

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