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Titolo:
NO VISUAL RESPONSES IN DENERVATED V1 - HIGH-RESOLUTION FUNCTIONAL MAGNETIC-RESONANCE-IMAGING OF A BLINDSIGHT PATIENT
Autore:
STOERIG P; KLEINSCHMIDT A; FRAHM J;
Indirizzi:
UNIV DUSSELDORF,INST PHYSIOL PSYCHOL,GEB 23-03,UNIV STR 1 D-40225 DUSSELDORF GERMANY MAX PLANCK INST BIOPHYS CHEM,BIOMED NMR FORSCH GMBH D-37070 GOTTINGENGERMANY
Titolo Testata:
NeuroReport
fascicolo: 1, volume: 9, anno: 1998,
pagine: 21 - 25
SICI:
0959-4965(1998)9:1<21:NVRIDV>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN BRAIN ACTIVATION; FIELD DEFECTS; MRI; CORTEX;
Keywords:
BLINDSIGHT; CORTICAL BLINDNESS; FMRI; FUNCTIONAL ACTIVATION; HUMAN; STRIATE CORTEX; VISUAL FIELD DEFECT; VISUAL STIMULATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
P. Stoerig et al., "NO VISUAL RESPONSES IN DENERVATED V1 - HIGH-RESOLUTION FUNCTIONAL MAGNETIC-RESONANCE-IMAGING OF A BLINDSIGHT PATIENT", NeuroReport, 9(1), 1998, pp. 21-25

Abstract

FOLLOWING severe cranio-cerebral trauma that affected the optic radiation, patient FS suffers from an incomplete macula-splitting hemianopia. Within the hemianopic field, FS exhibits blindsight, i.e. he detects and discriminates visual stimuli he cannot (consciously) see. We performed functional magnetic resonance imaging (fMRI) at high spatial resolution using a large flickering stimulus field to assess visual responsiveness of deafferented V1. Contrasting strong activation of the normal contralesional visual cortex, ipsilesional V1 displayed no stimulus-related MRI signal changes. However, activation was observed in ipsilesional extrastriate cortex. We conclude that blindsight does not depend on functional islands of tissue preserved within the deafferentedstriate cortex.

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Documento generato il 01/06/20 alle ore 02:22:27