Primary auditory cortex activation by visual speech: an fMRI study at 3 T.
Neuroreport
; 16(2): 125-8, 2005 Feb 08.
Article
em En
| MEDLINE
| ID: mdl-15671860
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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Estimulação Luminosa
/
Córtex Auditivo
/
Percepção da Fala
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Imageamento por Ressonância Magnética
/
Leitura Labial
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Neuroreport
Ano de publicação:
2005
Tipo de documento:
Article