Auditory sound agnosia without aphasia following a right temporal lobe lesion |
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Authors: | T Fujii R Fukatsu S Watabe A Ohnuma K Teramura I Kimura S Saso K Kogure |
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Institution: | Department of Neurology, Tohoku University School of Medicine, Sendai, Japan. |
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Abstract: | A 55-year-old right-handed man showed inability to recognize the meaning of non-verbal sounds without impairment of language comprehension after a cerebrovascular accident. His auditory acuity was intact and no other sign of agnosia, apraxia or aphasia was detectable. His errors on a test of sound recognition were acoustic rather than semantic. Brain CT scan showed a small lesion in the posterior part of the right temporal lobe. This case suggests that auditory sound agnosia without language disorder can ensure a lesion confined to the right hemisphere, and that the deficit is discriminative rather than associative in nature. |
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