title: Task-dependent laterality for cue decoding during spoken language processing.
abstract: The task-dependent laterality of the auditory cortices was investigated by measuring the magnetic fields elicited by three forms of a Japanese verb, which differed in terms of prosodic and phonetic cues. Significant task-dependent magnetic fields were found in both hemispheres during a prosody-related task, but only in the left during a phoneme-related task. The latency was similar to the mismatch negatively which reflects the neural activity of automatic cue decoding. These results suggest that task-dependent schemata are activated at least partially in parallel with automatic cue-decoding processes such that those in the left hemisphere process linguistic information irrespective of acoustic cues whereas those in the right hemisphere process prosodic information.
authors.affiliation: Department of Speech and Cognitive Sciences, Graduate School of Medicine, University of Tokyo, Bunkyo, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Imaizumi
authors.forename: K
authors.initials: K
authors.lastname: Mori
authors.forename: S
authors.initials: S
authors.lastname: Kiritani
authors.forename: H
authors.initials: H
authors.lastname: Hosoi
authors.forename: M
authors.initials: M
authors.lastname: Tonoike
mesh_terms: D000328:Adult; D003463:Cues; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D015225:Magnetoencephalography; D008297:Male; D008606:Mental Processes / Q000502:physiology*; D008875:Middle Aged; D008959:Models, Neurological; D013067:Speech Perception / Q000502:physiology*