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Titolo:
RESIDUAL VISION WITH AWARENESS IN THE FIELD CONTRALATERAL TO A PARTIAL OR COMPLETE FUNCTIONAL HEMISPHERECTOMY
Autore:
WESSINGER CM; FENDRICH R; PTITO A; VILLEMURE JG; GAZZANIGA MS;
Indirizzi:
GEORGETOWN UNIV,SCH MED,INST COGNIT & COMPUTAT SCI,3970 RESERVOIR RD WASHINGTON DC 20007 UNIV CALIF DAVIS,CTR NEUROSCI DAVIS CA 95616 MONTREAL NEUROL INST MONTREAL PQ H3A 2B4 CANADA
Titolo Testata:
Neuropsychologia
fascicolo: 11, volume: 34, anno: 1996,
pagine: 1129 - 1137
SICI:
0028-3932(1996)34:11<1129:RVWAIT>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
EARLY CEREBRAL HEMIDECORTICATION; RETINAL GANGLION-CELLS; EXTRINSIC DETERMINANTS; VISUAL FUNCTION; STRIATE CORTEX; BLIND FIELD; DISCRIMINATION; CAT; REPRESENTATION; PROJECTION;
Keywords:
HEMISPHERECTOMY; HEMIANOPIA; RESIDUAL VISION; RETINOTECTAL; NASO-TEMPORAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
53
Recensione:
Indirizzi per estratti:
Citazione:
C.M. Wessinger et al., "RESIDUAL VISION WITH AWARENESS IN THE FIELD CONTRALATERAL TO A PARTIAL OR COMPLETE FUNCTIONAL HEMISPHERECTOMY", Neuropsychologia, 34(11), 1996, pp. 1129-1137

Abstract

Two patients with unilateral disconnection or removal of the entire occipital lobe were tested for residual vision in their blind field. Using image stabilization to eliminate eye motion artifacts, the centralportion of each subject's visual field was tested, beginning 1 degrees from fixation and extending outward to 13.5 degrees. A narrow zone of residual vision was identified along the retinal vertical meridian of each patient. The lateral edge of this zone was generally within 3.5degrees of the vertical meridian, though extended farther outward (but not beyond 6 degrees) at one field location for each subject. In onepatient, it was present in both superior and inferior quadrants; in the other, it was confined to the superior quadrant. Within their zonesof residual vision, both patients could detect stimuli and perform simple shape discriminations, but could not name complex line drawings. The patients were aware of their vision within this zone. No residual vision, with or without awareness, was found in areas tested outside these zones. Given the complete absence of visual cortex contralateral to the observed residual vision, alternate structures must be mediating these abilities. Copyright (C) 1996 Elsevier Science Ltd.

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Documento generato il 03/04/20 alle ore 11:14:24