Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
USING LOCATIONS TO STORE SHAPE - AN INDIRECT EFFECT OF A LESION
Autore:
KOSSLYN SM; DALY PF; MCPEEK RM; ALPERT NM; KENNEDY DN; CAVINESS VS;
Indirizzi:
HARVARD UNIV,DEPT PSYCHOL CAMBRIDGE MA 02138 MASSACHUSETTS GEN HOSP,DEPT NEUROL CAMBRIDGE MA 02138 MASSACHUSETTS GEN HOSP,DEPT RADIOL CAMBRIDGE MA 02138
Titolo Testata:
Cerebral cortex
fascicolo: 6, volume: 3, anno: 1993,
pagine: 567 - 582
SICI:
1047-3211(1993)3:6<567:ULTSS->2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON EMISSION TOMOGRAPHY; CEREBRAL BLOOD-FLOW; EXTRASTRIATE CORTEX; METABOLISM; STIMULI; DISSOCIATION; LOCALIZATION; RECOGNITION; PERFORMANCE; COMPONENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
S.M. Kosslyn et al., "USING LOCATIONS TO STORE SHAPE - AN INDIRECT EFFECT OF A LESION", Cerebral cortex, 3(6), 1993, pp. 567-582

Abstract

This study had three general points. First, it examined possible visual consequences of frontal lesions. A patient with focal damage to thesubcortical regions of the left frontal lobe, and a small amount of damage near Broca's area, was predicted to have impaired brain functionin posterior regions that are anatomically connected to the damaged site. Second, it showed the utility of using positron emission tomography (PET) in conjunction with magnetic resonance imaging to characterize ''functional lesions. '' PET revealed reduced metabolism in posteriorcortical loci that are innervated by fibers from the damaged regions. Some of the affected areas are hypothesized to be involved in visual functions, specifically the encoding of lines and edges. Third, a series of tests was designed to document that the patient had difficulty encoding visual stimuli, and then to distinguish among alternative possible causes of this deficit. The results suggested that the patient encoded shapes as sets of filled locations if possible, which allowed him to use intact processes subserved by brain areas that were not affected by the damage, The data were best explained if the lesion slowed processing in the ventral system (which encodes object properties), allowing the dorsal system (which encodes spatial properties) to produce a response more quickly than the ventral system.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 08:57:08