Visual agnosia and amnesia from a left unilateral lesion.
This case report describes the behavior of a patient with a visual agnosia of the associative type, developing to optic agnosia at a later stage. Language, general intelligence and right hemisphere functions were well preserved, but recognition of visually presented objects, colors, faces, words, and complex stimuli was impaired. Agnosia was accompanied by a multimodal amnestic syndrome. CT displayed a focal left hemisphere lesion. The observed pathomorphology is not consistent with a bilateral visuolimbic disconnection syndrome, as suggested from previous case studies. Significant components of visual semantic processing may be executed by the left hemisphere.
Klinik für Neurologie, Innsbruck, Austria.
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Benke
D000328:Adult; D000377:Agnosia / Q000209:etiology* / Q000503:physiopathology; D000647:Amnesia / Q000209:etiology* / Q000503:physiopathology; D002543:Cerebral Hemorrhage / Q000150:complications* / Q000000981:diagnostic imaging / Q000503:physiopathology; D005260:Female; D005556:Form Perception / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D009483:Neuropsychological Tests; D010364:Pattern Recognition, Visual / Q000502:physiology*; D014057:Tomography, X-Ray Computed