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Titolo:
The neural substrate of orientation working memory
Autore:
Cornette, L; Dupont, P; Salmon, E; Orban, GA;
Indirizzi:
Katholieke Univ Leuven, Lab Neuro Psychofysiol, B-300 Louvain, Belgium Katholieke Univ Leuven Louvain Belgium B-300 iol, B-300 Louvain, Belgium Ctr Hosp Univ Liege, Liege, Belgium Ctr Hosp Univ Liege Liege BelgiumCtr Hosp Univ Liege, Liege, Belgium
Titolo Testata:
JOURNAL OF COGNITIVE NEUROSCIENCE
fascicolo: 6, volume: 13, anno: 2001,
pagine: 813 - 828
SICI:
0898-929X(20010815)13:6<813:TNSOOW>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
DORSOLATERAL PREFRONTAL CORTEX; POSITRON EMISSION TOMOGRAPHY; LATERAL FRONTAL-CORTEX; VISUAL MENTAL-IMAGERY; BRAIN ACTIVATION; PARIETAL CORTEX; SUSTAINED ACTIVITY; TASK-DIFFICULTY; RHESUS-MONKEY; PET EVIDENCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
84
Recensione:
Indirizzi per estratti:
Indirizzo: Orban, GA Katholieke Univ Leuven, Lab Neuro Psychofysiol, Campus Gasthuisberg,Herestr 49, B-300 Louvain, Belgium Katholieke Univ Leuven Campus Gasthuisberg,Herestr 49 Louvain Belgium B-300
Citazione:
L. Cornette et al., "The neural substrate of orientation working memory", J COGN NEUR, 13(6), 2001, pp. 813-828

Abstract

We have used positron emission tomography (PET) to identify, the neural substrate of two major cognitive components of working memory (WM), maintenance and manipulation of a single elementary visual attribute, i.e., the orientation of a grating presented in central vision. This approach allowed us to equate difficulty across tasks and prevented subjects from using verbal strategies or vestibular cues, Maintenance of orientations involved a distributed fronto-parietal network, that is, left and right lateral superior frontal sulcus (SFSl), bilateral ventrolateral prefrontal cortex (VLPFC), bilateral precuneus, and right superior parietal lobe (SPL). A more medial superior frontal sulcus region (SFSm) was identified as being instrumental in the manipulative operation of updating orientations retained in the WM. Functional connectivity analysis revealed that orientation WM relies on a coordinated interaction between frontal and parietal regions. In general, the current findings confirm the distinction between maintenance and manipulative processes, highlight the functional heterogeneity in the prefrontal cortex (PFC), and suggest a more dynamic view of WM as a process requiring the coordinated interaction of anatomically distinct brain areas.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 15:14:09