Optic aphasia and the right hemisphere: a replication and extension.
Optic aphasia is a rare, visual modality-specific naming disorder. We describe a patient who developed this disorder subsequent to a left occipital lobe infarction. Like another case that we described previously, this patient performed normally on a variety of tasks assessing the recognition of objects he could not name. Additionally, although he never read aloud a single word, his performance on lexical decision and word comprehension tasks was far better than chance. We suggest that his performance was mediated by a right hemisphere semantic system.
Coslett
H B
HB
Department of Neurology, Temple University Hospital, Philadelphia, PA 19140.
Saffran
E M
EM
D000368:Aged; D000377:Agnosia / Q000175:diagnosis / Q000503:physiopathology; D000849:Anomia / Q000175:diagnosis / Q000503:physiopathology; D001037:Aphasia / Q000175:diagnosis* / Q000503:physiopathology / Q000523:psychology; D001921:Brain / Q000503:physiopathology; D002561:Cerebrovascular Disorders / Q000175:diagnosis / Q000503:physiopathology; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D007807:Language Tests; D008297:Male; D009483:Neuropsychological Tests; D012660:Semantics; D014796:Visual Perception / Q000502:physiology*