Abstract:
:This fMRI study explored the functional neural organisation of seen speech in congenitally deaf native signers and hearing non-signers. Both groups showed extensive activation in perisylvian regions for speechreading words compared to viewing the model at rest. In contrast to earlier findings, activation in left middle and posterior portions of superior temporal cortex, including regions within the lateral sulcus and the superior and middle temporal gyri, was greater for deaf than hearing participants. This activation pattern survived covarying for speechreading skill, which was better in deaf than hearing participants. Furthermore, correlational analysis showed that regions of activation related to speechreading skill varied with the hearing status of the observers. Deaf participants showed a positive correlation between speechreading skill and activation in the middle/posterior superior temporal cortex. In hearing participants, however, more posterior and inferior temporal activation (including fusiform and lingual gyri) was positively correlated with speechreading skill. Together, these findings indicate that activation in the left superior temporal regions for silent speechreading can be modulated by both hearing status and speechreading skill.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Capek CM,Macsweeney M,Woll B,Waters D,McGuire PK,David AS,Brammer MJ,Campbell Rdoi
10.1016/j.neuropsychologia.2007.11.026subject
Has Abstractpub_date
2008-04-01 00:00:00pages
1233-41issue
5eissn
0028-3932issn
1873-3514pii
S0028-3932(07)00403-4journal_volume
46pub_type
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