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Titolo:
FUNCTIONAL MAGNETIC-RESONANCE-IMAGING OF THE PRIMARY VISUAL-CORTEX - EVALUATION OF HUMAN AFFERENT VISUAL-SYSTEM
Autore:
MIKI A; NAKAJIMA T; FUJITA M; WATANABE H; KUWABARA T; NARUSE S; TAKAGI M; ABE H;
Indirizzi:
NIIGATA UNIV,SCH MED,DEPT OPHTHALMOL,1-757 ASAHIMACHI DORI NIIGATA 951 JAPAN NIIGATA UNIV,BRAIN RES INST,DEPT NEUROL NIIGATA 951 JAPAN NATL SAIGATA HOSP,DEPT NEUROL OGATA JAPAN NATL SAIGATA HOSP,DEPT RADIOL OGATA JAPAN KYOTO PREFECTURAL UNIV MED,DEPT NEUROSURG & RADIOL KYOTO 602 JAPAN
Titolo Testata:
Japanese Journal of Ophthalmology
fascicolo: 3, volume: 39, anno: 1995,
pagine: 302 - 308
SICI:
0021-5155(1995)39:3<302:FMOTPV>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION TOMOGRAPHY; SIGNAL CHANGES; SENSORY STIMULATION; PHOTIC-STIMULATION; BLOOD OXYGENATION; STRIATE CORTEX; BRAIN-FUNCTION; METABOLISM; 1.5-T; FLOW;
Keywords:
FUNCTIONAL MAGNETIC RESONANCE IMAGING; HOMONYMOUS HEMIANOPIA; HUMAN BRAIN MAPPING; PRIMARY VISUAL CORTEX; VISUAL STIMULATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
A. Miki et al., "FUNCTIONAL MAGNETIC-RESONANCE-IMAGING OF THE PRIMARY VISUAL-CORTEX - EVALUATION OF HUMAN AFFERENT VISUAL-SYSTEM", Japanese Journal of Ophthalmology, 39(3), 1995, pp. 302-308

Abstract

The authors evaluated signal changes in the human primary visual cortex during visual stimulation using functional magnetic resonance imaging (fMRI) with a conventional gradient-echo magnetic resonance imaging(MRI) scanner at 1.5 Tesla. Experiments were performed on 10 normal volunteers and 2 patients with homonymous hemianopsia. In the normal volunteers, a signal increase was observed on the bilateral primary visual cortex during the full-field reversing checkerboard stimulation andon the contralateral cortex during hemifield stimulation. In one patient with homonymous hemianopsia after cerebral infarction, the signal change was clearly decreased on the affected side. In the other patient, who was recovering from multiple sclerosis to an almost normal visual field, the fMRI results were within normal limits. These results suggest that it is possible to map noninvasively the activation of the visual cortex during visual stimulation with a clinical MRI system, andthat this test might be useful as an objective method of visual fieldexamination.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 01:53:50