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ArtikelParametrically 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 artikelCandidate 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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