Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
The effects of aging on visual memory: evidence for functional reorganization of cortical networks
Autore:
Bennett, PJ; Sekuler, AB; McIntosh, AR; Della-Maggiore, V;
Indirizzi:
Univ Toronto, Dept Psychol, Toronto, ON M5S 3G3, Canada Univ Toronto Toronto ON Canada M5S 3G3 ychol, Toronto, ON M5S 3G3, Canada Rotman Res Inst, Toronto, ON M6A 2E1, Canada Rotman Res Inst Toronto ON Canada M6A 2E1 st, Toronto, ON M6A 2E1, Canada
Titolo Testata:
ACTA PSYCHOLOGICA
fascicolo: 1-3, volume: 107, anno: 2001,
pagine: 249 - 273
SICI:
0001-6918(200104)107:1-3<249:TEOAOV>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
SHORT-TERM-MEMORY; PERCEPTION FOLLOWING LESIONS; SPATIAL-FREQUENCY; ORIENTATION DISCRIMINATION; PREFRONTAL CORTEX; AGE; BRAIN; CONTRAST; MONKEY; IDENTIFICATION;
Keywords:
aging; plasticity; short-term memory; visual memory; vision; neuroimaging; psychophysics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: Sekuler, AB Univ Toronto, Dept Psychol, Suite 4020,100 St George St, Toronto, ON M5S 3G3, Canada Univ Toronto Suite 4020,100 St George St Toronto ON Canada M5S 3G3
Citazione:
P.J. Bennett et al., "The effects of aging on visual memory: evidence for functional reorganization of cortical networks", ACT PSYCHOL, 107(1-3), 2001, pp. 249-273

Abstract

Recent evidence suggests that the mature human brain is capable of substantial functional reorganization following injury. The fact that the brain retains a great deal of plasticity raises the possibility that cortical reorganization may occur during normal aging. We examined this issue by using positron emission tomography (PET) to measure the brain activity associated with short-term memory for simple visual attributes in young and old observers. A two-interval forced choice procedure was used to measure spatial frequency discrimination thresholds for sine wave gratings presented at different inter-stimulus intervals (ISI). Memory load was manipulated by varying the duration of the ISI and by presenting an irrelevant masking stimulus in the middle of the ISI, Old and young observers performed the experiment equally well. However, the neural systems correlated with good performance differed for the two age groups. The results support the hypothesis that the functional networks that underlie visual memory undergo reorganization during aging. (C) 2001 Published by Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 08:52:03