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Titolo:
RESIDUAL PROCESSING OF CHROMATIC SIGNALS IN THE ABSENCE OF A GENICULOSTRIATE PROJECTION
Autore:
BARBUR JL; SAHRAIE A; SIMMONS A; WEISKRANTZ L; WILLIAMS SCR;
Indirizzi:
CITY UNIV LONDON,APPL VIS RES CTR,NORTHAMPTON SQ LONDON EC1V 7DD ENGLAND INST PSYCHIAT,NEUROIMAGING RES GRP LONDON SE5 8AF ENGLAND UNIV OXFORD,DEPT PSYCHOL OXFORD OX1 3UD ENGLAND
Titolo Testata:
Vision research (Oxford)
fascicolo: 21, volume: 38, anno: 1998,
pagine: 3447 - 3453
SICI:
0042-6989(1998)38:21<3447:RPOCSI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUAL-CORTEX; PUPIL RESPONSE; COLOR; DISCRIMINATION; STIMULUS; PULVINAR; PATTERN; SYSTEM; VISION; V1;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
J.L. Barbur et al., "RESIDUAL PROCESSING OF CHROMATIC SIGNALS IN THE ABSENCE OF A GENICULOSTRIATE PROJECTION", Vision research (Oxford), 38(21), 1998, pp. 3447-3453

Abstract

We have investigated the residual processing of chromatic signals in a subject with unilateral damage to the primary visual cortex using psychophysical, pupillometric and functional magnetic resonance imaging (fMRI) methods. Of particular interest was to establish the correlation between the subject's ability to make use of chromatic signals in the blind hemifield to discriminate between different coloured targets, the corresponding residual pupil colour responses and the level and location of cortical activation generated by the same stimuli as revealed by fMRI. The results obtained using the three different experimentalapproaches are consistent and suggest that retrograde degeneration ofthalamic and retinal chromatic processing mechanisms caused by damageto the primary visual cortex in man does not abolish completely the ability to process chromatic signals particularly when large, long-wavelength stimuli are employed. (C) 1998 Elsevier Science Ltd. All rightsreserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 05:11:50