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Parametrically Dissociating Speech and Nonspeech Perception in the Brain Using fMRI
Oleh:
Benson, Randall R.
;
Whalen, D. H.
;
Richardson, Matthew
;
Swainson, Brook
;
Clark, Vincent P.
;
Lai, Song
;
Liberman, Alvin M.
Jenis:
Article from Journal - ilmiah internasional
Dalam koleksi:
Brain and Language (Full Text) vol. 78 no. 3 (2001)
,
page 364-396.
Topik:
brain
;
language
;
speech
;
phonetic
;
imaging
;
fMRI
;
parametric
;
Wernicke
;
auditory
;
perception
Fulltext:
78_03_Benson.pdf
(599.41KB)
Isi artikel
Candidate brain regions constituting a neural network for preattentive phonetic perception were identified with fMRI and multivariate multiple regression of imaging data. Stimuli contrasted along speech/nonspeech, acoustic, or phonetic complexity (three levels each) and natural/synthetic dimensions. Seven distributed brain regions’ activity correlated with speech and speech complexity dimensions, including five left-sided foci [posterior superior temporal gyrus (STG), angular gyrus, ventral occipitotemporal cortex, inferior/posterior supramarginal gyrus, and middle frontal gyrus (MFG)] and two right-sided foci (posterior STG and anterior insula). Only the left MFG discriminated natural and synthetic speech. The data also supported a parallel rather than serial model of auditory speech and nonspeech perception.
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