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Titolo:
NETWORKS OF DOMAIN-SPECIFIC AND GENERAL REGIONS INVOLVED IN EPISODIC MEMORY FOR SPATIAL LOCATION AND OBJECT IDENTITY
Autore:
KOHLER S; MOSCOVITCH M; WINOCUR G; HOULE S; MCINTOSH AR;
Indirizzi:
UNIV TORONTO,ROTMAN RES INST,BAYCREST CTR GERIATR CARE,3560 BATHURST ST TORONTO ON M6A 2E1 CANADA BAYCREST CTR GERIATR CARE,DEPT PSYCHOL TORONTO ON CANADA UNIV TORONTO,DEPT PSYCHOL TORONTO ON M5S 1A1 CANADA TRENT UNIV,DEPT PSYCHOL PETERBOROUGH ON K9J 7B8 CANADA UNIV TORONTO,CLARKE INST PSYCHIAT,PET CTR TORONTO ON CANADA
Titolo Testata:
Neuropsychologia
fascicolo: 2, volume: 36, anno: 1998,
pagine: 129 - 142
SICI:
0028-3932(1998)36:2<129:NODAGR>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION TOMOGRAPHY; WORKING-MEMORY; HUMAN BRAIN; FUNCTIONAL-ANATOMY; PREFRONTAL CORTEX; VERBAL MEMORY; FRONTAL-LOBE; RETRIEVAL; PET; RECOGNITION;
Keywords:
POSITRON EMISSION TOMOGRAPHY; HUMAN; SPATIAL VISION; OBJECT VISION; EXTRASTRIATE CORTEX; HIPPOCAMPUS; PREFRONTAL CORTEX;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
74
Recensione:
Indirizzi per estratti:
Citazione:
S. Kohler et al., "NETWORKS OF DOMAIN-SPECIFIC AND GENERAL REGIONS INVOLVED IN EPISODIC MEMORY FOR SPATIAL LOCATION AND OBJECT IDENTITY", Neuropsychologia, 36(2), 1998, pp. 129-142

Abstract

Positron emission tomography (PET) was used to investigate human episodic memory for spatial location and object identity. We measured regional cerebral bloodflow (rCBF) while subjects engaged in perceptual matching of the location or the identity of line drawings of objects. Perceptual matching also involved incidental encoding of the presented information. Subsequently, rCBF was measured when subjects retrieved the location or the identity of these objects from memory. Using the multivariate partial least squares image analysis, we identified three patterns of activity across the brain that allowed us to distinguish structures that are differentially involved in processing spatial location and object identity from structures that are differentially involvedin encoding and retrieval but operate across both domains. Domain-specificity was evident by increased rCBF during the processing of spatial location in the right middle occipital gyrus, supramarginal gyrus, and-superior temporal sulcus, and by increased rCBF during the processing of object identity in portions of bilateral lingual and fusiform gyri. There was a nearly complete overlap between domain-specific dorsaland ventral extrastriate cortex activations during perceptual matching and memory retrieval. Evidence of domain-specificity was also found in the prefrontal cortex and the left hippocampus, but the effect interacted with encoding and retrieval. Domain-general structures includedbilateral superior temporal cortex regions, which were preferentiallyactivated during encoding, and portions of bilateral middle and inferior frontal gyri, which were preferentially activated during retrieval. Together, our data suggest that encoding and retrieval in episodic memory depend on the interplay between domain-specific structures, mostof which are involved in memory as well as perception, and domain-general structures, some of which operate more at encoding and others more at retrieval. (C) 1998 Published by Elsevier Science Ltd. All rightsreserved.

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Documento generato il 11/07/20 alle ore 20:06:15