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Titolo:
Sensory and response interference by ipsilesional stimuli in tactile extinction
Autore:
Vaishnavi, S; Calhoun, J; Southwood, MH; Chatterjee, A;
Indirizzi:
Univ Penn, Dept Neurol, Philadelphia, PA 19104 USA Univ Penn PhiladelphiaPA USA 19104 pt Neurol, Philadelphia, PA 19104 USA Univ Penn, Ctr Cognit Neurosci, Philadelphia, PA 19104 USA Univ Penn Philadelphia PA USA 19104 Neurosci, Philadelphia, PA 19104 USA Univ Alabama, Dept Rehabil Sci, Birmingham, AL USA Univ Alabama Birmingham AL USA ama, Dept Rehabil Sci, Birmingham, AL USA Univ Alabama, Cognit Sci Programme, Birmingham, AL USA Univ Alabama Birmingham AL USA Cognit Sci Programme, Birmingham, AL USA
Titolo Testata:
CORTEX
fascicolo: 1, volume: 36, anno: 2000,
pagine: 81 - 92
SICI:
0010-9452(200002)36:1<81:SARIBI>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNILATERAL NEGLECT; VISUAL EXTINCTION; ATTENTION;
Keywords:
attention; intention; neglect; signal detection theory;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Chatterjee, A Univ Penn, Dept Neurol, 3 W Gates Bldg,3400 Spruce St, Philadelphia, PA 19104 USA Univ Penn 3 W Gates Bldg,3400 Spruce St Philadelphia PA USA 19104
Citazione:
S. Vaishnavi et al., "Sensory and response interference by ipsilesional stimuli in tactile extinction", CORTEX, 36(1), 2000, pp. 81-92

Abstract

Extinction is thought to be due to a pathologically limited attentional capacity in which multiple stimuli cannot be processed simultaneously to conscious awareness. Patients with tactile extinction are aware of being touched on a contralesional limb, but seem unaware of similar contralesional touch if touched simultaneously on their ipsilesional limb. The ipsilesional stimulus interferes and competes with the processing of the contralesional stimulus. Most theorists assume that the ipsilesional stimulus affects the sensory processing of the contralesional stimulus, although the precise functional level at which this interference occurs is not clear. We report a series of experiments using signal detection analyses to investigate tactile extinction in one patient (DC). These analyses revealed that ipsilesional stimuli, in addition to interfering with processing of contralateral sensations, also interfere with verbal reports of those sensations. This influence on responses suggests that interference in tactile extinction can occur at a post-perceptual level, further 'downstream' than previously thought.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 04:31:30