title: [A case of cortical deafness following bilateral putaminal hemorrhage].
abstract: A 59-year-old man had suffered from consciousness disturbance and right hemiplegia in December, 1996. He was diagnosed as left putaminal hemorrhage and his symptoms improved by conservative treatment. After one week since the onset, when he became alert, he noticed deafness. He was admitted in our hospital because of deafness and dysarthria in March, 2001. T 1-weighted MR image of the brain revealed bilateral putaminal hemorrhage and a low signal area in the white matter of right temporal lobe. Single photon emission computed tomography image revealed hypoperfusion in the bilateral temporal lobes. His electrocochleogram and auditory brainstem response were normal. Audiogram revealed increased air and bone conduction thresholds. Therefore, we diagnosed his condition as cortical deafness. He could only recognize loudness as the sound by the electrical promontory test. These results indicate that his cortical deafness might be caused by his bilateral acoustic radiation damage associated with the right partial temporal lobe damage and that some fibers of the acoustic radiation, which were responsible for the recognition of loudness of sound, were spared. Therefore he has a possibility of regaining hearing capability by a cochlear implant.
authors.affiliation: Division of Neurology, Department of Internal Medicine, Miyazaki Medical College, Kiyotake 5200, Miyazaki 889-1692, Japan.
authors.forename: Yasuji
authors.initials: Y
authors.lastname: Arimura
authors.forename: Takekazu
authors.initials: T
authors.lastname: Ohi
authors.forename: Kensuke
authors.initials: K
authors.lastname: Shimizu
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Shiomi
authors.forename: Seiichiro
authors.initials: S
authors.lastname: Sugimoto
authors.forename: Shigeru
authors.initials: S
authors.lastname: Matsukura
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Touno
authors.forename: Shizuo
authors.initials: S
authors.lastname: Komune
mesh_terms: D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology; D001931:Brain Mapping; D002560:Cerebrovascular Circulation; D016057:Evoked Potentials, Auditory, Brain Stem; D006313:Hearing Loss, Central / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D020146:Putaminal Hemorrhage / Q000150:complications* / Q000175:diagnosis; D015899:Tomography, Emission-Computed, Single-Photon