An earlier component of face perception detected by seeing-as-face task

Yutaka Kato, Taro Muramatsu, Motoichiro Kato, Masuro Shintani, Fumihiro Yoshino, Masaki Shimono, Tatsuya Ishikawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


To investigate the time sequence of the neural processes underlying face perception, magnetoencephalography was performed using a seeing-as-face task, in which visual inputs were identical across two conditions, but subject perceptions differed: one being a non-specific pattern of geographical shapes, the other being a percept of a face. Subtraction between the two conditions revealed a response occurring 120 ms after stimulus onset in right occipital, ∼50 ms earlier than previously reported response at a latency of 170 ms at the right fusiform gyrus. As our novel task completely excluded differences in low-level properties of visual stimuli between control and face conditions, these two responses were considered specific to face perception. The result supported the two-stage theory of face processing.

Original languageEnglish
Pages (from-to)225-229
Number of pages5
Issue number2
Publication statusPublished - 2004 Feb 9


  • Face perception
  • M100
  • M170
  • Magnetoencephalography (MEG)
  • Seeing-as-face

ASJC Scopus subject areas

  • Neuroscience(all)


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