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Titolo:
General and task-specific frontal lobe recruitment in older adults during executive processes: A fMRI investigation of task-switching
Autore:
DiGirolamo, GJ; Kramer, AF; Barad, V; Cepeda, NJ; Weissman, DH; Milham, MP; Wszalek, TM; Cohen, NJ; Banich, MT; Webb, A; Belopolsky, AV; McAuley, E;
Indirizzi:
Univ Cambridge, Dept Expt Psychol, Cambridge CB3 2EB, England Univ Cambridge Cambridge England CB3 2EB hol, Cambridge CB3 2EB, England Univ Illinois, Beckman Inst, Chicago, IL 60680 USA Univ Illinois Chicago IL USA 60680 s, Beckman Inst, Chicago, IL 60680 USA
Titolo Testata:
NEUROREPORT
fascicolo: 9, volume: 12, anno: 2001,
pagine: 2065 - 2071
SICI:
0959-4965(20010703)12:9<2065:GATFLR>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
CEREBRAL BLOOD-FLOW; WORKING-MEMORY; PREFRONTAL CORTEX; NEURAL ACTIVITY; AGE-DIFFERENCES; ACTIVATION; DISEASE; INTELLIGENCE; BEHAVIOR; PET;
Keywords:
ageing; frontal lobe function; neuroimaging;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: DiGirolamo, GJ Univ Cambridge, Dept Expt Psychol, Downing Site, Cambridge CB3 2EB, England Univ Cambridge Downing Site Cambridge England CB3 2EB land
Citazione:
G.J. DiGirolamo et al., "General and task-specific frontal lobe recruitment in older adults during executive processes: A fMRI investigation of task-switching", NEUROREPORT, 12(9), 2001, pp. 2065-2071

Abstract

Performance deteriorates when subjects must shift between two different tasks relative to performing either task separately. This switching cost is thought to result from executive processes that are not inherent to the component operations of either task when performed alone. Medial and dorsolateral frontal cortices are theorized to subserve these executive processes. Here we show that larger areas of activation were seen in dorsolateral and medial frontal cortex in both younger and older adults during switching than repeating conditions, confirming the role of these frontal brain regions inexecutive processes. Younger subjects activated these medial and dorsolateral frontal cortices only when switching between tasks; in contrast, older subjects recruited similar frontal regions while performing the tasks in isolation as well as alternating between them. Older adults recruit medial and dorsolateral frontal areas, and the processes computed by these areas, even when no such demands are intrinsic to the current task conditions. This neural recruitment may be useful in offsetting the declines in cognitive function associated with ageing. NeuroReport 12:2065-2071 (C) 2001 LippincottWilliams & Wilkins.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 01:03:23