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Titolo:
Striatum forever, despite sequence learning variability: A random effect analysis of PET data
Autore:
Peigneux, P; Maquet, P; Meulemans, T; Destrebecqz, A; Laureys, S; Degueldre, C; Delfiore, G; Aerts, J; Luxen, A; Franck, G; Van der Linden, M; Cleeremans, A;
Indirizzi:
Univ Liege, Ctr Rech Cyclotron, B-4000 Liege, Belgium Univ Liege Liege Belgium B-4000 tr Rech Cyclotron, B-4000 Liege, Belgium Univ Liege, Serv Neuropsychol, B-4000 Liege, Belgium Univ Liege Liege Belgium B-4000 Serv Neuropsychol, B-4000 Liege, Belgium Univ Liege, Serv Neurol, B-4000 Liege, Belgium Univ Liege Liege Belgium B-4000 iege, Serv Neurol, B-4000 Liege, Belgium Free Univ Brussels, Cognit Sci Res Unit, B-1050 Brussels, Belgium Free Univ Brussels Brussels Belgium B-1050 nit, B-1050 Brussels, Belgium
Titolo Testata:
HUMAN BRAIN MAPPING
fascicolo: 4, volume: 10, anno: 2000,
pagine: 179 - 194
SICI:
1065-9471(200008)10:4<179:SFDSLV>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
REACTION-TIME-TASK; SUPPLEMENTARY MOTOR AREA; FOCAL CEREBELLAR LESIONS; PARKINSONS-DISEASE; BASAL GANGLIA; VISUOMOTOR SEQUENCE; HUNTINGTONS-DISEASE; COMPARING DIRECT; FRONTAL LOBES; O-15 PET;
Keywords:
implicit learning; serial reaction time; individual variability; PET; statistical parametric mapping; striatum; caudate nucleus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Peigneux, P Univ Liege, Ctr Rech Cyclotron, Bat B30, B-4000 Liege, BelgiumUniv Liege Bat B30 Liege Belgium B-4000 B-4000 Liege, Belgium
Citazione:
P. Peigneux et al., "Striatum forever, despite sequence learning variability: A random effect analysis of PET data", HUM BRAIN M, 10(4), 2000, pp. 179-194

Abstract

This PET study is concerned with the what, where, and how of implicit sequence learning. Ln contrast with previous studies imaging the serial reaction time (SRT) task, the sequence of successive locations was determined by aprobabilistic finite-state grammar. The implicit acquisition of statistical relationships between serially ordered elements (i.e., what) was studied scan by scan, aiming to evidence the brain areas (i.e., where) specificallyinvolved in the implicit processing of this core component of sequential higher-order knowledge. As behavioural results demonstrate between- and within-subjects variability in the implicit acquisition of sequential knowledgethrough practice, functional PET data were modelled using a random-effect model analysis (i.e., how) to account for both sources of behavioural variability. First, two mean condition images were created per subject dependingon the presence or not of implicit sequential knowledge at the time of each of the 12 scans. Next, direct comparison of these mean condition images provided the brain areas involved in sequential knowledge processing. Using this approach, we have shown that the striatum is involved in more than simple pairwise associations and that it has the capacity to process higher-order knowledge. We suggest that the striatum is not only involved in the implicit automatization of serial information through prefrontal cortex-caudate nucleus networks, but also that it Flays a significant role for the selection of the most appropriate responses in the context created by both the current and previous stimuli, thus contributing to better efficiency and faster response preparation in the SRT task. (C) 2000 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 18:51:08