Abstract：
:To examine the neural mechanism underlying illusory-contour perception, we measured the magnetic responses of the human visual cortex to an abutting-line grating inducing illusory contours (test stimulus) and a non-abutting-line grating (control stimulus) using the technique of magnetoencephalography (MEG). In the initial latency period of 60-80 ms, the MEG response to the test stimulus was nearly identical with that to the control stimulus, but in the subsequent period of 80-150 ms, the former was larger than the latter. The origin of the peak MEG response to the test stimulus was estimated to be in the vicinity of striate cortex/extrastriate visual cortex for two of the four subjects. These results suggest that, in accord with those of the previous electrophysiological and functional magnetic resonance imaging studies, illusory-contour signals are generated in the very early stage(s) of processing in the primate visual cortex.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Ohtani Y,Okamura S,Shibasaki T,Arakawa A,Yoshida Y,Toyama K,Ejima Ydoi
10.1016/s0304-3940(02)00062-9keywords:
subject
Has Abstractpub_date
2002-03-22 00:00:00pages
173-6issue
3eissn
0304-3940issn
1872-7972pii
S0304394002000629journal_volume
321pub_type
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