Investigating form and colour perception in blindsight using an interference task
作者:
James Danckert,
Paul Maruff,
Glynda Kinsella,
Steven de Graaff,
Jon Currie,
期刊:
NeuroReport
(OVID Available online 1998)
卷期:
Volume 9,
issue 13
页码: 2919-2925
ISSN:0959-4965
年代: 1998
出版商: OVID
关键词: Blindsight;Extrastriate cortex;Flanker task;Thalamus
数据来源: OVID
摘要:
PATIENTS with striate cortical damage causing a hemianopic field defect can nevertheless demonstrate residual visual capacities in their blind field. Previous research investigating blindsight required patients to respond explicitly to stimuli appearing in the blind field by making forced choice judgements. We present data from a patient with a left occipital lesion resulting in a homonymous hemianopia, using the flanker task. This patient displayed a significant flanker congruency effect (FCE) for colour and letter stimuli even when they appeared in the blind field. A control patient with a lesion of the right thalamus showed no FCE in the blind field. This suggests that thalamo-extrastriate neural pathways are necessary for residual functioning in blindsight.
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