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Titolo:
TOWARD A PRINCIPLED EXPLANATION OF UNILATERAL NEGLECT
Autore:
HALLIGAN PW; MARSHALL JC;
Indirizzi:
RIVERMEAD REHABIL CTR,ABINGDON RD OXFORD OX1 4XD ENGLAND RADCLIFFE INFIRM,NEUROPSYCHOL UNIT OXFORD OX2 6HE ENGLAND
Titolo Testata:
Cognitive neuropsychology
fascicolo: 2, volume: 11, anno: 1994,
pagine: 167 - 206
SICI:
0264-3294(1994)11:2<167:TAPEOU>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUO-SPATIAL NEGLECT; BRAIN-DAMAGED PATIENTS; RIGHT-HEMISPHERE LESIONS; LEFT-SIDED NEGLECT; LINE BISECTION; VISUOSPATIAL NEGLECT; DIRECTIONAL HYPOKINESIA; HEMISPATIAL NEGLECT; SELECTIVE ATTENTION; CEREBRAL-LESIONS;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Citazioni:
213
Recensione:
Indirizzi per estratti:
Citazione:
P.W. Halligan e J.C. Marshall, "TOWARD A PRINCIPLED EXPLANATION OF UNILATERAL NEGLECT", Cognitive neuropsychology, 11(2), 1994, pp. 167-206

Abstract

In the unilateral neglect syndrome, patients seem unable to detect orrespond to stimuli in spatial locations contralateral to the damaged cerebral hemisphere. The condition has been reported in the visual, auditory, tactile, and olfactory modalities, although the most extensiveinvestigations have concerned visuo-spatial neglect. Left neglect after right hemisphere lesion is more frequent, severe, and long-lasting than right neglect after left hemisphere lesion. Left neglect is a major negative prognostic factor after brain damage and is reliably associated with poor performance on many functional recovery measures.Many current accounts stress that neglect is an ''attentional'' disorder, although there are numerous (potentially competing) hypotheses that emphasise ''perceptual,'' ''representational'' ''intentional,'' and ''premotor'' factors. In short, there is little theoretical consensus and it is possible that many distinct impairments have been conflated underthe label of ''unilateral neglect. '' The theoretical integration proposed here attempts to derive many of the core clinical symptoms of neglect from two (conceptually) independent properties of normal hemispheric specialisation: the contralateral ''orientational bias'' of each cerebral hemisphere, and the association of ''focal'' and ''global'' processing biases (attentional and/or perceptual) with left and right hemisphere mechanisms, respectively.

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Documento generato il 26/01/20 alle ore 01:23:28