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Titolo:
Spatiotemporal maps of brain activity underlying word generation and theirmodification during repetition priming
Autore:
Dhond, RP; Buckner, RL; Dale, AM; Marinkovic, K; Halgren, E;
Indirizzi:
Massachusetts Gen Hosp, Nucl Magnet Resonance Ctr, Charlestown, MA 02129 USA Massachusetts Gen Hosp Charlestown MA USA 02129 Charlestown, MA 02129 USA Univ Utah, Dept Radiol, Salt Lake City, UT 84105 USA Univ Utah Salt Lake City UT USA 84105 adiol, Salt Lake City, UT 84105 USA Washington Univ, Howard Hughes Med Inst, Dept Psychol Radiol & Anat & Neurobiol, St Louis, MO 63130 USA Washington Univ St Louis MO USA 63130 & Neurobiol, St Louis, MO 63130 USA
Titolo Testata:
JOURNAL OF NEUROSCIENCE
fascicolo: 10, volume: 21, anno: 2001,
pagine: 3564 - 3571
SICI:
0270-6474(20010515)21:10<3564:SMOBAU>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON EMISSION TOMOGRAPHY; DEPTH-RECORDED POTENTIALS; TEMPORAL LANGUAGE AREA; LEFT PREFRONTAL CORTEX; SURFACE-BASED ANALYSIS; FUNCTIONAL MRI; CORTICAL ACTIVITY; FACE PERCEPTION; WORKING-MEMORY; NEURAL SYSTEM;
Keywords:
word-stem completion; magnetoencephalography; temporal lobe; planum temporale; prefrontal cortex; language; occipital lobe; word form;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Halgren, E Massachusetts Gen Hosp, Nucl Magnet Resonance Ctr, Room 2301,Bldg 149,13thSt, Charlestown, MA 02129 USA Massachusetts Gen Hosp Room 2301,Bldg 149,13th St Charlestown MA USA 02129
Citazione:
R.P. Dhond et al., "Spatiotemporal maps of brain activity underlying word generation and theirmodification during repetition priming", J NEUROSC, 21(10), 2001, pp. 3564-3571

Abstract

Spatiotemporal maps of brain activity based on magnetoencephalography wereused to observe sequential stages in language processing and their modification during repetition priming. Subjects performed word- stem completion and produced either novel or repeated (primed) words across trials. Activation passes from primary visual cortex (activated at similar to 100 msec after word presentation), to left anteroventral occipital (similar to 180 msec), to cortex in and near Wernicke's (similar to 210 msec) and then Broca's (similar to 370 msec) areas. In addition, a posteroventral temporal area is activated simultaneously with posterosuperior temporal cortex. This area shows an early (similar to 200-245 msec) increase in activation to repeated word stems. In contrast, prefrontal and anterior temporal regions showed activity reductions to repeated word stems late (similar to 365-500 msec) in processing. These results tend to support classical models of language and suggest that an effect of direct item repetition is to allow word-form processing to increase its contribution to task performance while concurrently allowing reductions in time-consuming frontal temporal processing.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 00:30:01