Abstract:
:Recent studies have yielded contradictory evidence on whether visual speech perception (watching articulatory gestures) can activate the human primary auditory cortex. To circumvent confounds due to inter-individual anatomical variation, we defined our subjects' Heschl's gyri and assessed blood oxygenation-dependent signal changes at 3 T within this confined region during visual speech perception and observation of moving circles. Visual speech perception activated Heschl's gyri in nine subjects, with activation in seven of them extending to the area of primary auditory cortex. Activation was significantly stronger during visual speech perception than during observation of the moving circles. Further, a significant hemisphere by stimulus interaction occurred, suggesting left Heschl's gyrus specialization for visual speech processing.
journal_name
Neuroreportjournal_title
Neuroreportauthors
Pekkola J,Ojanen V,Autti T,Jääskeläinen IP,Möttönen R,Tarkiainen A,Sams Mdoi
10.1097/00001756-200502080-00010subject
Has Abstractpub_date
2005-02-08 00:00:00pages
125-8issue
2eissn
0959-4965issn
1473-558Xpii
00001756-200502080-00010journal_volume
16pub_type
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