Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Dissociable mechanisms of attentional control within the human prefrontal cortex
Autore:
Nagahama, Y; Okada, T; Katsumi, Y; Hayashi, T; Yamauchi, H; Oyanagi, C; Konishi, J; Fukuyama, H; Shibasaki, H;
Indirizzi:
Kyoto Univ, Fac Med, Dept Brain Pathophysiol, Kyoto 6068507, Japan Kyoto Univ Kyoto Japan 6068507 Brain Pathophysiol, Kyoto 6068507, Japan Kyoto Univ, Fac Med, Dept Nucl Med, Kyoto 6068507, Japan Kyoto Univ Kyoto Japan 6068507 Med, Dept Nucl Med, Kyoto 6068507, Japan Kyoto Univ, Fac Med, Dept Neurol, Kyoto 6068507, Japan Kyoto Univ Kyoto Japan 6068507 ac Med, Dept Neurol, Kyoto 6068507, Japan
Titolo Testata:
CEREBRAL CORTEX
fascicolo: 1, volume: 11, anno: 2001,
pagine: 85 - 92
SICI:
1047-3211(200101)11:1<85:DMOACW>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARD SORTING TEST; POSITRON EMISSION TOMOGRAPHY; NONSPATIAL WORKING-MEMORY; LATERAL FRONTAL-CORTEX; FUNCTIONAL MRI; TASK-DIFFICULTY; LOBE LESIONS; ACTIVATION; PERFORMANCE; SET;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Fukuyama, H Kyoto Univ, Fac Med, Dept Brain Pathophysiol, 54 Shogoin Kawahara Cho, Kyoto 6068507, Japan Kyoto Univ 54 Shogoin Kawahara Cho Kyoto Japan 6068507 Japan
Citazione:
Y. Nagahama et al., "Dissociable mechanisms of attentional control within the human prefrontal cortex", CEREB CORT, 11(1), 2001, pp. 85-92

Abstract

Neuropsychological tests that require shifting an attentional set, such asthe Wisconsin card Sorting Test, are sensitive to frontal robe damage. Although little information is available for humans, an animal experiment suggested that different regions of the prefrontal cortex may contribute to setshifting behavior at different levels of processing. Behavioral studies also suggest that set shifting trials are more time consuming than non set shifting trials (i.e. switch cost) and that this may be underpinned by differences at the neural level, We determined whether there were differential neural responses associated with two different levels of shifting behavior, that of reversal of stimulus-response associations within a perceptual dimension or that of shifting an attentional set between different perceptual dimensions. Neural activity in the antero dorsal prefrontal cortex increased only in attentional set shifting, in which switch costs were significant. Activity in the postero-ventral prefrontal cortex increased not only in set shifting but also in reversing stimulus-response associations, in which switch costs were absent. We conclude that these distinct regions in the humanprefrontal cortex provide different levels of attention control in response selection. Thus, the antero-dorsal prefrontal cortex may be critical for higher order control of attention, i.e. attentional set shifting, whereas the postero-ventral area may be related to a lower level of shift, i.e. reorganizing stimulus-response associations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 20:44:22