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Titolo:
Lexical retrieval during fluent speech production: an fMRI study
Autore:
Kircher, TTJ; Brammer, MJ; Williams, SCR; McGuire, PK;
Indirizzi:
Univ Tubingen, Dept Psychiat, D-72076 Tubingen, Germany Univ Tubingen Tubingen Germany D-72076 ychiat, D-72076 Tubingen, Germany Inst Psychiat, London SE5 8AF, England Inst Psychiat London England SE5 8AF t Psychiat, London SE5 8AF, England GKT Sch Med, Dept Psychol Med, London SE5 8AF, England GKT Sch Med London England SE5 8AF Psychol Med, London SE5 8AF, England
Titolo Testata:
NEUROREPORT
fascicolo: 18, volume: 11, anno: 2000,
pagine: 4093 - 4096
SICI:
0959-4965(200012)11:18<4093:LRDFSP>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
GENERIC BRAIN ACTIVATION; WORKING-MEMORY; PET; ANATOMY; TASK;
Keywords:
articulation; language production; lexical retrieval; speech production; superior temporal gyrus; verbal fluency;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Kircher, TTJ Univ Tubingen, Dept Psychiat, Osianderstr 24, D-72076 Tubingen, Germany Univ Tubingen Osianderstr 24 Tubingen Germany D-72076 ermany
Citazione:
T.T.J. Kircher et al., "Lexical retrieval during fluent speech production: an fMRI study", NEUROREPORT, 11(18), 2000, pp. 4093-4096

Abstract

We investigated the neural correlates of lexical retrieval during fluent speech production using MRI. Blood oxygenation level dependent (BOLD) contrast was measured while subjects spoke about 7 Rorschach inkblots for 3 min each. Varying degrees of speech rate were elicited during each run. In a within-subject design, the number of words produced was correlated with the BOLD contrast in the two runs in each subject that showed the highest variance of speech output. The rate of articulation was positively correlated withactivation in the left superior temporal (BA 22) and supramarginal (BA 39/40) gyri. The main negative correlations were in the fusiform gyri bilaterally (BA 19), the posterior cingulate (BA 30) and superior occipital gyrus (BA 19). Lexical retrieval during continuous language production engages areas in the left temporal and inferior parietal cortex. This pattern of activation differs from that evident during the generation of single words (verbal fluency), which is more associated with left prefrontal activation. NeuroReport 11:4093-4096 (C) 2000 Lippincott Williams & Wilkins.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/01/20 alle ore 15:19:38