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Titolo:
FUNCTIONAL-HETEROGENEITY OF LEFT INFERIOR FRONTAL-CORTEX AS REVEALED BY FMRI
Autore:
PAULESU E; GOLDACRE B; SCIFO P; CAPPA SF; GILARDI MC; CASTIGLIONI I; PERANI D; FAZIO F;
Indirizzi:
UNIV MILAN,CNR,INB,DEPT NUCL MED,SCI INST H SAN RAFFAELE,VIA OLGETTINA 60 I-20132 MILAN ITALY UNIV MILAN,CNR,INB,DEPT NUCL MED,SCI INST H SAN RAFFAELE I-20132 MILAN ITALY UNIV BRESCIA,DEPT NEUROL BRESCIA ITALY
Titolo Testata:
NeuroReport
fascicolo: 8, volume: 8, anno: 1997,
pagine: 2011 - 2017
SICI:
0959-4965(1997)8:8<2011:FOLIFA>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
WORKING-MEMORY; VERBAL MEMORY; RETRIEVAL; SYSTEMS; TASKS;
Keywords:
ACTIVATION; BROCAS AREA; ECHOPLANAR IMAGING; FLUENCY; FMRI; PHONEMIC; SEMANTIC; WORD RETRIEVAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
E. Paulesu et al., "FUNCTIONAL-HETEROGENEITY OF LEFT INFERIOR FRONTAL-CORTEX AS REVEALED BY FMRI", NeuroReport, 8(8), 1997, pp. 2011-2017

Abstract

USING functional magnetic resonance imaging (fMRI), Rie mapped brain activity in six normal volunteers during two silent verbal fluency tasks, one with a phonemic (letter) cue and one with a semantic (category) cue. In comparison with resting state, both tasks activated the anterior triangular portion of the left inferior frontal gyrus (IFG or F3,for third frontal gyrus) and the left thalamus. There were also areasactivated in one task but not in the other: the posterior opercular portion of the left IFG for phonemic fluency, and the left retrosplenial region for semantic fluency. Our findings concur with normal psychophysical data and neuropsychological observations to suggest the recruitment of two overlapping but dissociable systems for the two tasks, and demonstrate functional heterogeneity within the left IFG (Broca's area), where the opercular portion is responsible for obtaining access to words through a phonemic/articulatory route.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 10:31:52