Masataka Ishii

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We report the rare case of ipsilateral posterior inferior cerebellar artery originating from the carotid artery, and associated with multiple concurrent aneurysms. This is the 23rd reported case of carotid-cerebellar anastomosis and the first case with three concurrent aneurysms reported in the literature. Of the 23 cases, 6 had single aneurysms, 2 had(More)
The possible changes in the subarachnoid space after subarachnoid haemorrhage were studied in animals by using a scanning electron microscope (SEM). About 1 ml/kg of autogenous blood was injected intracisternally in 36 adult mongrel dogs to investigate changes in the subarachnoid space, over periods ranging from immediately after the injection to as long as(More)
Scanning electron microscopic observations of the subarachnoid space were made in dogs focussing upon the fibre components in both the normal subarachnoid space and in areas of post-haemorrhagic fibrosis. It was concluded that the fibrous tissue originates from the arachnoid membrane itself, while organized haematoma is considered to form a component of the(More)
The present paper develops a virtual tennis system using robotic devices for the rehabilitation of upper arm movements, and discusses an evaluation method of human motor skills for natural stroke in the dynamic task. In the training, a trainee manipulates the handle of an impedance-controlled robot to hit a ball by a racket toward the center of a circular(More)
Sixty dogs with experimental subarachnoid haemorrhage (SAH), repeated SAH, and subarachnoid fibrosis (examined three weeks and three months after SAH, and treated with urokinase or dexamethasone) were examined by scanning electron microscope (SEM). The authors observed the resting and activated macrophages, the erythrophagocytosis, and giant cells in the(More)
The arachnoid villi of 18 dogs were studied. The authors confirmed the pressure gradient changes of the morphology of arachnoid villi of dogs with the scanning electron microscope (SEM). A subarachnoid infusion with 5--10 times higher pressure gradient than the physiological one, tore the superficial endothelial layer from the villi, and the inner part(More)
The effect of antifibrinolytic therapy on posthaemorrhagic subarachnoid fibrosis was observed experimentally in dogs with the scanning electron microscope (SEM). The subchronic subjects, given intravenous injections of tranexamic acid (1 mg/day) for 12 days and sacrificed 3 weeks after cisternal blood injection, showed residual clot with thick fibrosis,(More)
A case of a 43-year-old man with coexistence of intracranial and spinal cavernous angiomas is presented. The patient had a 2-year history of severe back pain incurred by neck flexion, and he became aware of weakness of the right lower extremity and paresthesia of the left lower extremity. Neurological examinations at the time of the first admission(More)
A case of dural arteriovenous malformation with giant non-traumatic false aneurysm in the left middle fossa is reported. A 10-year-old female patient was admitted to our hospital with pulsating exophthalmos of the left eye, which was successfully treated by ligation of the main feeder and finally by the radical excision of the dural AVM and false aneurysm.(More)