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| Research article summary (published 22 Apr 2009): |
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Common cortical responses evoked by appearance, disappearance and change of the human face.
Full Abstract
BACKGROUND: To segregate luminance-related, face-related and non-specific components involved in spatio-temporal dynamics of cortical activations to a face stimulus, we recorded cortical responses to face appearance (Onset), disappearance (Offset), and change (Change) using magnetoencephalography. RESULTS: Activity in and around the primary visual cortex (V1/V2) showed luminance-dependent behavior. Any of the three events evoked activity in the middle occipital gyrus (MOG) at 150 ms and temporo-parietal junction (TPJ) at 250 ms after the onset of each event. Onset and Change activated the fusiform gyrus (FG), while Offset did not. This FG activation showed a triphasic waveform, consistent with results of intracranial recordings in humans. CONCLUSION: Analysis employed in this study successfully segregated four different elements involved in the spatio-temporal dynamics of cortical activations in response to a face stimulus. The results show the responses of MOG and TPJ to be associated with non-specific processes, such as the detection of abrupt changes or exogenous attention. Activity in FG corresponds to a face-specific response recorded by intracranial studies, and that in V1/V2 is related to a change in luminance.
Author information
Author/s: Tanaka, Emi (E); Inui, Koji (K); Kida, Tetsuo (T); Kakigi, Ryusuke (R);
Affiliation: Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki, Japan. temi(-atsign-)nips.ac.jp
Journal and publication information
Publication Type: Comparative Study; Journal Article
Journal: BMC neuroscience (BMC Neurosci), published in England. (Language: eng)
Reference: 2009-; vol 10 (issue ) : pp 38
Dates: Created 2009/05/12; Completed 2009/06/30;
PMID: 19389259, status: MEDLINE (last retrieval date: 6/30/2009, IMS Date: 30 Jun 2009 00:00:00)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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