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Titolo:
Human temporal lobe activation by speech and nonspeech sounds
Autore:
Binder, JR; Frost, JA; Hammeke, TA; Bellgowan, PSF; Springer, JA; Kaufman, JN; Possing, ET;
Indirizzi:
Med Coll Wisconsin, Dept Neurol, Milwaukee, WI 53226 USA Med Coll Wisconsin Milwaukee WI USA 53226 Neurol, Milwaukee, WI 53226 USA Med Coll Wisconsin, Dept Cellular Biol Neurobiol & Anat, Milwaukee, WI 53226 USA Med Coll Wisconsin Milwaukee WI USA 53226 & Anat, Milwaukee, WI 53226 USA
Titolo Testata:
CEREBRAL CORTEX
fascicolo: 5, volume: 10, anno: 2000,
pagine: 512 - 528
SICI:
1047-3211(200005)10:5<512:HTLABS>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION TOMOGRAPHY; HUMAN AUDITORY-CORTEX; FREQUENCY-MODULATED SOUNDS; PURE WORD DEAFNESS; HUMAN-BRAIN; CORTICAL REPRESENTATION; TONOTOPIC ORGANIZATION; BILATERAL LESIONS; PREFRONTAL CORTEX; PLANUM TEMPORALE;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
113
Recensione:
Indirizzi per estratti:
Indirizzo: Binder, JR Med Coll Wisconsin, Dept Neurol, 9200 W Wisconsin Ave, Milwaukee, WI 53226USA Med Coll Wisconsin 9200 W Wisconsin Ave Milwaukee WI USA 53226
Citazione:
J.R. Binder et al., "Human temporal lobe activation by speech and nonspeech sounds", CEREB CORT, 10(5), 2000, pp. 512-528

Abstract

Functional organization of the lateral temporal cortex in humans is not well understood. We recorded blood oxygenation signals from the temporal lobes of normal volunteers using functional magnetic resonance imaging during stimulation with unstructured noise, frequency-modulated (FM) tones, reversed speech, pseudowords and words. For all conditions, subjects performed a material-nonspecific detection response when a train of stimuli began or ceased. Dorsal areas surrounding Heschl's gyrus bilaterally, particularly the planum temporale and dorsolateral superior temporal gyrus, were more strongly activated by FM tones than by noise, suggesting a role in processing simple temporally encoded auditory information. Distinct from these dorsolateral areas, regions centered in the superior temporal sulcus bilaterally weremore activated by speech stimuli than by FM tones. Identical results were obtained in this region using words, pseudowords and reversed speech, suggesting that the speech-tones activation difference is due to acoustic ratherthan linguistic factors. In contrast, previous comparisons between word and nonword speech sounds showed left lateralized activation differences in more ventral temporal and temporoparietal regions that are likely involved in processing lexical-semantic or syntactic information associated with words. The results indicate functional subdivision of the human lateral temporal cortex and provide a preliminary framework for understanding the corticalprocessing of speech sounds.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 09:24:32