Visual Phonetic Processing Localized Using Speech and Non-Speech Face Gestures in Video and Point-Light Displays
Identifieur interne : 001073 ( Pmc/Corpus ); précédent : 001072; suivant : 001074Visual Phonetic Processing Localized Using Speech and Non-Speech Face Gestures in Video and Point-Light Displays
Auteurs : Lynne E. Bernstein ; Jintao Jiang ; Dimitrios Pantazis ; Zhong-Lin Lu ; Anand JoshiSource :
- Human brain mapping [ 1065-9471 ] ; 2010.
Abstract
The talking face affords multiple types of information. To isolate cortical sites with responsibility for integrating linguistically relevant visual speech cues, speech and non-speech face gestures were presented in natural video and point-light displays during fMRI scanning at 3.0T. Participants with normal hearing viewed the stimuli and also viewed localizers for the fusiform face area (FFA), the lateral occipital complex (LOC), and the visual motion (V5/MT) regions of interest (ROIs). The FFA, the LOC, and V5/MT were significantly less activated for speech relative to non-speech and control stimuli. Distinct activation of the posterior superior temporal sulcus and the adjacent middle temporal gyrus to speech, independent of media, was obtained in group analyses. Individual analyses showed that speech and non-speech stimuli were associated with adjacent but different activations, with the speech activations more anterior. We suggest that the speech activation area is the temporal visual speech area (TVSA), and that it can be localized with the combination of stimuli used in this study.
Url:
DOI: 10.1002/hbm.21139
PubMed: 20853377
PubMed Central: 3120928
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