Visual field defects in lateral geniculate body infarction.
نویسندگان
چکیده
منابع مشابه
Visual field defects in vascular lesions of the lateral geniculate body.
Corresponding retinal nerve fibres begin their path in the eyes and end in a single visual cortical cell. Because of this arrangement, lesions in the anterior visual pathway produce incongruent visual field defects and in the posterior pathway congruent field defects. The lateral geniculate body is on the anterior third of the visual pathway. A lesion of this nucleus produces moderately to comp...
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Three patients were found to have visual field defects which involved homonymous horizontal sectors of the visual fields, thus mimicking field defects associated with lesions of the lateral geniculate nucleus. Computed tomography provided anatomical evidence that the responsible lesion involved the optic radiations rather than the lateral geniculate nucleus.
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Quantitative perimetric studies in two patients with involvement of a lateral geniculate nucleus (caused by astrocytoma in one and a small arteriovenous malformation in the other) revealed strikingly incongruous defects in the contralateral homonymous fields of vision. The patterns of these hemianopias were analysed and correlated anatomically in terms of established patterns of retinal project...
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THEIMPORTANCEOFNORMALSENSORYSTIMULATION inthedevelopment and maintenance of the nervous system is now generally recognized. In the visual system this problem has usually been approached by examining the effects of sensory deprivation on structure and behavior (see reviews by Hebb (12) and Riesen (28)). An obvious way of extending this work would be to examine electrophysiologically the function...
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IN ANIMALS with welI-developed binocular vision, such as the cat, monkey, and man, the retina is divided into temporal and nasal halves which, respectively, send optic fibers back to the same and opposite halves of the brain so that the left hemiretinas of both eyes project to the left hemisphere of the brain and, similarly, the right hemiretinas to the right hemisphere. This means that an obje...
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ژورنال
عنوان ژورنال: Nosotchu
سال: 1997
ISSN: 0912-0726,1883-1923
DOI: 10.3995/jstroke.19.323