Hiroshi Hirayama

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Chronic cats with double hemisections of the spinal cord, first at a lower thoracic level followed by a contralateral midthoracic cord at intervals of 0 to 126 days (T-T preparations) or first at an upper cervical followed by a midthoracic at intervals of 15 to 74 days (C-T preparations), eventually recovered quadrupedal standing 7 to 53 days after the(More)
The antiepileptic effects of globulin-N, an intact human immunoglobulin was examined, using the amygdaloid kindled animals prepared by the method of Goddard et al. [1969] and Wada et al. [1974 b]. In the non-treated kindled cats, kindled convulsion and after-discharge (AD) were simultaneously created at 24-hour intervals by electrically stimulating(More)
In order to investigate if inter-limb propriospinal reflexes participate in coordination of locomotive movements of fore- and hindlimbs, we examined the relations between fore- and hindlimbs during overground locomotion of adult cats with spinal cord lesions. In a group of cats (T-T preparations), the spinal cord was hemisected first at around Th12 and then(More)
The purpose of this study was to evaluate the effect of changing mandibular position on body posture and reciprocally, body posture on mandibular position. Forty-five (45) asymptomatic subjects (24 males and 21 females, ages 21-53 years, mean age 30.7 years) were included in this study and randomly assigned to one of two groups, based on the table of random(More)
Activities of motor units of human tibialis anterior muscle were studied when the subject maintained the force of the muscle at a constant level voluntarily. Motor units were classified into two main groups according to their discharge frequencies and their tensions. Those units which were recruited from the beginning of the contraction and discharged(More)
Proliferative potential of four cases of central neurocytoma were assessed by a silver colloid staining technique for argyrophilic protein associated with nucleolar organizer regions (AgNORs). All but one tumor had an Ag-NOR score of less than 2 and were regarded as a benign entity. However, one tumor tissue from a patient suffering from a recurrent central(More)
Fourteen cases of various grades of gliomas were investigated by an immunohistochemical method using a monoclonal antibody, Ki-67, which reacted with a nuclear antigen in proliferating cells, and the correlation between Ki-67 labeling index and the number of nucleolar organizer regions stained by an argyrophilic method. Four normal brain tissue samples(More)
A 56-year-old man presented with a rare traumatic basilar artery occlusion caused by a fracture of the clivus. He fell from the height of 2 meters and immediately fell into a coma. Head computed tomography (CT) revealed an open depressed fracture, an acute epidural hematoma 1 cm thick in the left middle frontal fossa, and a longitudinal fracture of the(More)
Stimulation of C6 cells with endothelin-1 (ET) caused a biphasic sn-1,2-diacylglycerol (1,2-DG) generation, which occurred not only via phosphatidylinositol 4,5-P2 (PIP2) hydrolysis by specific phospholipase C action, but also through the breakdown of phosphatidylcholine (PC) induced by either PC phospholipase C or D. ET also stimulated DNA synthesis in(More)
We describe herein a surgically treated case of Lhermitte-Duclos disease in a 33-year-old man. The clinical presentation seemed typical in terms of symptoms, neurological signs, and neuroimaging. High and heterogenous fluorodeoxyglucose uptake in positron emission tomography study is presented and discussed. Furthermore, we performed volumetric analysis of(More)