Visuoverbal disconnection (optical aphasia) for objects, pictures, colors and faces with abstractive alexia

The case is reported of a patient who, after a left occipital infarction, presented a deficit in naming visually presented objects with neither aphasia, nor perturbation in the perceptive and associative processing of visual informations. This visuo-verbal disconnection was accompanied by disturbanc...

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Bibliographic Details
Published in:Neuropsychologia 1985, Vol.23 (3), p.333-349
Main Authors: Gil, R, Pluchon, C, Toullat, G, Micheneau, D, Rogez, R, Lefevre, J P
Format: Article
Language:fre
Subjects:
Aged
Agnosia - psychology
Anomia - psychology
Aphasia - psychology
Association Learning
Cerebral Infarction - psychology
Color Perception
Discrimination Learning
Dyslexia, Acquired - psychology
Face
Form Perception
Humans
Male
Neuropsychological Tests
Pattern Recognition, Visual
Semantics
Visual Perception
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Summary:The case is reported of a patient who, after a left occipital infarction, presented a deficit in naming visually presented objects with neither aphasia, nor perturbation in the perceptive and associative processing of visual informations. This visuo-verbal disconnection was accompanied by disturbance of the semantic function when this was explored via the visual channel. In addition the patient showed an alexia which could be described as an abstraction defect. Finally, the patient showed a deficit in naming colors and faces, without evidence for agnosia. This observation argues in favor of maintaining a distinction between visual associative agnosia and optic aphasia. It also demonstrates that the naming deficit implies a deficit in extracting semantic values from visual informations such as objects or graphic symbols.
ISSN:0028-3932