Ayumu Ohnuma

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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(More)
Language is fairly well preserved in most patients with mild Alzheimer's disease, but writing ability seems to be impaired even in the early stages of the disease. To investigate the neural bases of writing impairments in Alzheimer's disease (AD), we examined the correlation between writing ability and regional cerebral blood flow (rCBF) in 52 Japanese(More)
BACKGROUND/AIMS We investigated writing abilities in patients with the amnestic type of mild cognitive impairment (aMCI) and mild Alzheimer's disease (AD). To examine the earliest changes in writing function, we used writing tests for both words and sentences with different types of Japanese characters (Hiragana, Katakana, and Kanji). METHODS A total of(More)
We report a 44-year-old woman who had anti-aquaporin 4 (AQP4) antibody-positive myelitis and immune thrombocytopenic purpura (ITP). She was admitted to our hospital with paraparesis, dysesthesia below the Th8 dermatome level on her right side and lower extremities, constipation and urinary retention. Magnetic resonance imaging revealed a longitudinally(More)
To electrophysiologically diagnose amyotrophic lateral sclerosis (ALS), fasciculation potentials (FPs) were evaluated in each wasted muscle in 12 ALS and 14 other neurogenic disorders (non-ALS patients). Various types of FPs were observed in ALS. The number of discharged FPs and firing rate of FPs were significantly increased in ALS compared to those in(More)
Familial occurrence of inclusion body myositis is extremely rare, and only a few cases in Western countries have been reported. In these reports, a strong association of this disease with DR3 (DRB1*0301/0302) and the efficacy of immunosuppressants suggested that an immune pathomechanism is involved in the disease. We, for the first time, report two Japanese(More)
Serial CT and MRI findings in five patients (two boys and three girls) with Leigh syndrome were retrospectively reviewed in a follow-up period lasting from six months to 10 years. The two boys were found to have cytochrome c oxidase deficiency and one of the girls to have mitochondrial DNA mutation, while the remaining two girls had no detectable enzyme(More)
Tracheostomy has been employed to release the airway obstruction at the glottic level and to prevent sudden death in patients with multiple system atrophy (MSA). However, sudden death is possible even after tracheostomy. Nocturnal polysomnography showed that the apnea-hypopnea index became higher after tracheostomy, and all tracheostomized patients had(More)
We measured the CSF tau protein levels in 26 patients with Guillain-Barré syndrome. The levels of the poor outcome group (Hughes grade at 6 months was between II and VI, n = 6) were higher than those of the good outcome group (0 or I, n = 20) (p < 0.0005). The higher levels of CSF tau may reflect axonal degeneration and could predict a poor clinical outcome(More)