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Titolo:
FUNCTIONAL INTERACTIONS BETWEEN THE MEDIAL TEMPORAL LOBES AND POSTERIOR NEOCORTEX RELATED TO EPISODIC MEMORY RETRIEVAL
Autore:
KOHLER S; MCINTOSH AR; MOSCOVITCH M; WINOCUR G;
Indirizzi:
MCGILL UNIV,MONTREAL NEUROL INST,COGNIT NEUROSCI UNIT,3801 UNIV ST MONTREAL PQ H3A 2B4 CANADA UNIV TORONTO,BAYCREST CTR GERIATR CARE,ROTMAN RES INST TORONTO ON CANADA BAYCREST CTR GERIATR CARE,DEPT PSYCHOL TORONTO ON CANADA UNIV TORONTO,DEPT PSYCHOL TORONTO ON M5S 1A1 CANADA UNIV TRENT,DEPT PSYCHOL PETERBOROUGH ON CANADA
Titolo Testata:
Cerebral cortex (New York, N.Y. 1991)
fascicolo: 5, volume: 8, anno: 1998,
pagine: 451 - 461
SICI:
1047-3211(1998)8:5<451:FIBTMT>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION TOMOGRAPHY; NETWORK ANALYSIS; PARAHIPPOCAMPAL CORTICES; HIPPOCAMPAL-FORMATION; PREFRONTAL CORTEX; SPATIAL LOCATION; VISUAL PATHWAYS; BRAIN-REGIONS; HUMANS; OBJECT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
70
Recensione:
Indirizzi per estratti:
Citazione:
S. Kohler et al., "FUNCTIONAL INTERACTIONS BETWEEN THE MEDIAL TEMPORAL LOBES AND POSTERIOR NEOCORTEX RELATED TO EPISODIC MEMORY RETRIEVAL", Cerebral cortex (New York, N.Y. 1991), 8(5), 1998, pp. 451-461

Abstract

We applied structural equation modeling to positron emission tomography data in humans to examine functional interactions between the rightmedial temporal lobe (MTL) and selected right neocortical regions in relation to visual recognition memory. Using a priori knowledge about anatomical connections between these regions as a guiding constraint, we modeled the pattern of interactions [i.e. covariances in regional cerebral blood flow (rCBF)] associated with episodic memory retrieval of spatial location and compared it with the pattern for retrieval of object identity. We also compared these patterns with those associated with perceptual matching of spatial location and object identity. Although displaying no difference in average rCBF across tasks, the right MTL showed domain-specific qualitative differences in interactions with posterior dorsal (parieto-occipital sulcus, supramarginal gyrus) andventral regions (fusiform gyrus, superior temporal sulcus) hut not with a prefrontal region. MTL interactions involving dorsal regions werepositive in the spatial retrieval task but negative for object retrieval. Interactions involving ventral regions showed the reverse pattern. No comparable changes were observed during perceptual matching. Using control models, we demonstrated the neuroanatomical specificity of these results. Our results provide support for the notion that the nature of interactions between the MTL and posterior neocortex depends on the domain of information to-be recovered.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 11:25:36