Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Learning related modulation of functional retrieval networks in man
Autore:
Petersson, KM; Sandblom, J; Gisselgard, J; Ingvar, M;
Indirizzi:
Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden Karolinska Inst Stockholm Sweden Dept Clin Neurosci, Stockholm, Sweden
Titolo Testata:
SCANDINAVIAN JOURNAL OF PSYCHOLOGY
fascicolo: 3, volume: 42, anno: 2001,
pagine: 197 - 216
SICI:
0036-5564(200107)42:3<197:LRMOFR>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION-TOMOGRAPHY; ANTERIOR CINGULATE CORTEX; EPISODIC MEMORY RETRIEVAL; MEDIAL TEMPORAL LOBES; PREFRONTAL CORTEX; HUMAN BRAIN; HIPPOCAMPAL-FORMATION; WORKING-MEMORY; VISUOSPATIAL ATTENTION; RECOGNITION MEMORY;
Keywords:
episodic memory; medial temporal lobe; hippocampus; retrieval; recognition; recall; PET; brain activation; functional neuroimaging;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
90
Recensione:
Indirizzi per estratti:
Indirizzo: Petersson, KM Karolinska Hosp, Dept Clin Neurosci, Cognit Neurophysiol ResGrp, Karolinska Inst, R2-01, S-17176 Stockholm, Sweden Karolinska Hosp R2-01 Stockholm Sweden S-17176 holm, Sweden
Citazione:
K.M. Petersson et al., "Learning related modulation of functional retrieval networks in man", SC J PSYCHO, 42(3), 2001, pp. 197-216

Abstract

The medial temporal lobe has been implicated in studies of episodic memorytasks involving spatio-temporal context and object-location conjunctions. We have previously demonstrated that an increased level of practice in a free-recall task parallels a decrease in the functional activity of several brain regions, including the medial temporal robe, the prefrontal, the anterior cingulate, the anterior insular, and the posterior parietal cortices, that in concert demonstrate a move from elaborate controlled processing towards a higher degree of automaticity. Here we report data from two experiments that extend these initial observations. We used a similar experimental approach but probed for effects of retrieval paradigms and stimulus material. In the first experiment we investigated practice related changes during recognition of object-location conjunctions and in the second during free-recall of pseudo-words. Learning in a neural network is a dynamic consequenceof information processing and network plasticity. The present and previousPET results indicate that practice can induce a learning related functional restructuring of information processing. Different adaptive processes likely subserve the functional re-organisation observed. These may in part be related to different demands For attentional and working memory processing. It appears that the role(s) of the prefrontal cortex and the medial temporal lobe in memory retrieval are complex, perhaps reflecting several different interacting processes or cognitive components. We suggest that an integrative interactive perspective on the role of the prefrontal and medial temporal lobe is necessary for an understanding of the processing significance of these regions in learning and memory. It appears necessary to develop elaborated and explicit computational models for prefrontal and medial temporal functions in order to derive detailed empirical predictions, and in combination with an efficient use and development of functional neuroimaging approaches, to further the understanding of the processing significance of these regions in memory.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 18:29:52