Auditory sound agnosia without aphasia following a right temporal lobe lesion.
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.
Fujii
T
T
Department of Neurology, Tohoku University School of Medicine, Sendai, Japan.
Fukatsu
R
R
Watabe
S
S
Ohnuma
A
A
Teramura
K
K
Kimura
I
I
Saso
S
S
Kogure
K
K
D000377:Agnosia / Q000209:etiology* / Q000523:psychology; D001299:Audiometry; D002543:Cerebral Hemorrhage / Q000150:complications* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008568:Memory; D008875:Middle Aged; D009483:Neuropsychological Tests; D013016:Sound; D013702:Temporal Lobe / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed