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Although a linear correlation between oscillatory activities in the right and left motor cortices during movements has been shown in monkeys, there has been a debate whether scalp-recorded EEG coherence in human reflects a similar association. By applying partial coherence analysis, we demonstrated that interhemispheric coherence during movements cannot be(More)
OBJECTIVES To investigate the physiologic mechanism of human electroencephalogram-electromyogram (EEG-EMG) coherence, the directed transfer function (DTF) based on a multivariate autoregressive (MVAR) model was computed. METHODS Fifty-six channel EEG and EMG of the right abductor pollicis brevis muscle during a weak tonic contraction were recorded in 6(More)
STUDY OBJECTIVES The relationship between memory enhancement and fast (13-16 Hz) versus slow (10-13 Hz) spindle activity during sleep was investigated. DESIGN Standard polysomnographic recordings were conducted during an adaptation, control nonlearning, and learning night. Automatic spindle detection and measurement was utilized with visual confirmation.(More)
OBJECTIVE The present study examined whether slow and/or fast sleep spindles are related to visuomotor learning, by examining the densities of current sleep spindle activities. METHODS Participants completed a visuomotor task before and after sleep on the learning night. This task was not performed on the non-learning night. Standard polysomnographic(More)
We report a patient with severe sensory ataxia, areflexia, and ophthalmoplegia with preservation of limb muscle strength. Electrophysiological examinations revealed peripheral sensory nerve involvement. A serological examination showed the elevation of IgG antibodies to various b-series gangliosides as well as GT1a. These indicated that this case is an(More)
A 67-year-old man temporarily complained of hearing loss and earache in the left side. Afterwards, hearing impairment in the right, pharyngalgia, dysphagia, and ipsilateral facial weakness occurred, however, otological treatments did not completely improve these symptoms except facial weakness. On admission neurological examination revealed right cranial(More)
Pure autonomic failure (PAF) is an uncommon disorder, characterized by autonomic failure without other neurological deficits. We report here an autopsy case of pure autonomic failure with pathological features of Parkinson's disease. At age 79, the patient developed slowly progressive severe orthostatic hypotension, followed by decreased sweating and(More)
A 70-year-old man developed slowly progressive muscular atrophy in the lower limbs from age 28, followed by urinary disturbance from age 40. Neurological examination revealed bilateral severe muscular atrophy in the lower limbs with hypesthesia and hypalgesia, mild muscle wasting of both hands, urinary incontinence, and constipation. A sacral dimple was(More)
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