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Titolo:
New questions on the hemispheric encoding/retrieval asymmetry (HERA) modelassessed by divided visual-field tachistoscopy in normal subjects
Autore:
Blanchet, S; Desgranges, B; Denise, P; Lechevalier, B; Eustache, F; Faure, S;
Indirizzi:
Univ Caen, Lab Psychol Cognit & Pathol, Maison Rech Sci Humaines, F-14032 Caen, France Univ Caen Caen France F-14032 on Rech Sci Humaines, F-14032 Caen, France CHU Cote Nacre, Neurol Serv, INSERM, Unite 320, F-14033 Caen, France CHU Cote Nacre Caen France F-14033 SERM, Unite 320, F-14033 Caen, France CHU Cote Nacre, Physiol Lab, F-14033 Caen, France CHU Cote Nacre Caen France F-14033 re, Physiol Lab, F-14033 Caen, France
Titolo Testata:
NEUROPSYCHOLOGIA
fascicolo: 5, volume: 39, anno: 2001,
pagine: 502 - 509
SICI:
0028-3932(2001)39:5<502:NQOTHE>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION TOMOGRAPHY; SPATIAL WORKING-MEMORY; EPISODIC MEMORY; PREFRONTAL CORTEX; BRAIN ACTIVITY; RETRIEVAL; PET; RECOGNITION; ACTIVATION; LANGUAGE;
Keywords:
episodic memory; working memory; hemispheric asymmetry; verbal material; visuospatial material;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Eustache, F Univ Caen, Lab Psychol Cognit & Pathol, Maison Rech Sci Humaines, F-14032 Caen, France Univ Caen Caen France F-14032 Humaines, F-14032 Caen, France
Citazione:
S. Blanchet et al., "New questions on the hemispheric encoding/retrieval asymmetry (HERA) modelassessed by divided visual-field tachistoscopy in normal subjects", NEUROPSYCHO, 39(5), 2001, pp. 502-509

Abstract

According to the hemispheric encoding/retrieval asymmetry (HERA) model, based on data obtained through functional neuroimaging, the left and right prefrontal cortices are preferentially, and, respectively, involved in long-term episodic memory encoding and retrieval. In this study, the HERA model was tested from a behavioral perspective using divided visual-field tachistoscopy. A recognition paradigm with both verbal and visuospatial materials was devised to differentiate memory-related effects (encoding vs. retrieval)from effects linked to the materials. The paradigm used lists of 12 and four items to assess long-term episodic memory and short-term memory, respectively. The aim of the latter condition was to test whether the HERA model is applicable in short-term memory. For long-term episodic memory, the data obtained validated the HERA model; the direction of the hemispheric asymmetry was found to depend on the type of materials used, whereas its magnitudewas determined by the type of memory process. For verbal short-term memory, the HERA model seems to be confirmed. The pre-existing representations ofthe material could take into account the similarity of the hemispheric asymmetry pattern between short-term memory and long-term memory. In contrast,for visuospatial short-term memory, Baddeley's working memory model seems to better explain our results insofar as the asymmetries were essentially linked to the material in encoding but not in retrieval. This latter difference between short-term memory and long-term indicates that processes involved in LTM depend on episodic processes per se, hence, lending more support for the HERA model. Accordingly, these two memory systems seem to bring into play two different modes of hemisphere specialization. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 05/12/20 alle ore 01:27:29