Neurologia medico-chirurgica
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Neurol. Med. Chir. (Tokyo) · Oct 1997
Case ReportsHemifacial spasm resulting from facial nerve compression near the internal acoustic meatus--case report.
A 61-year-old female presented with a rare case of hemifacial spasm (HFS) resulting from facial nerve compression near the internal acoustic meatus. She underwent a first surgery for microvascular decompression at the root entry zone of the facial nerve, but this did not achieve resolution of the HFS. ⋯ When the AICA was dissected and separated from the facial nerve, abnormal muscle responses of the mentalis muscle due to electrical stimulation of the zygomatic branch of the facial nerve were abolished. Following surgery the patient was completely free of the HFS.
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Neurol. Med. Chir. (Tokyo) · Jul 1997
Case ReportsPure amnesia caused by bilateral temporal lobe astrocytoma--case report.
A 32-year-old male presented with progressive pure amnesia caused by astrocytoma invading the bilateral medial temporal lobes. Methionine positron emission tomography demonstrated the extent of tumor invasion well. His memory impairment was partially improved by treatment for the astrocytoma. Lesion of the bilateral hippocampus causes memory impairment, but pure memory loss without other associated neurological sign or deterioration of consciousness is rare in a case of cerebral neoplasm.
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Neurol. Med. Chir. (Tokyo) · Jul 1997
Acute subdural hematoma without subarachnoid hemorrhage due to ruptured intracranial aneurysm--case report.
A 54-year-old female presented with acute subdural hematoma secondary to rupture of an intracranial aneurysm. She was admitted with acute onset of severe headache, nausea, and vomiting. There was no past history of head trauma. ⋯ Angiography revealed an aneurysm of the internal carotid-posterior communicating artery which was oriented posterolaterally. Uneventful clipping was performed and the patient was discharged from hospital without neurological deficits. The possibility of aneurysmal subdural hematoma should be considered in the absence of trauma.
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Neurol. Med. Chir. (Tokyo) · Apr 1997
Case ReportsThoracic dumbbell-shaped neurinoma treated by unilateral hemilaminectomy with partial costotransversectomy--case report.
A 56-year-old male was admitted in January 1994, with back pain persisting for 2 months. Magnetic resonance imaging disclosed a homogeneously enhanced mass occupying the spinal canal at the T-8 level and extending into the retropleural space through the left intervertebral foramen between T-8 and T-9. ⋯ Histological examination indicated neurinoma. This approach allows excellent visualization of anterior paraspinal components of the tumor, preserves important anatomic structures, and requires minimal compression of the cord for removal of the lesion.
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Neurol. Med. Chir. (Tokyo) · Jan 1997
Effects of intrathecal nonnarcotic analgesics on chronic tactile allodynia in rats: alpha 2-agonists versus somatostatin analog.
The effects of the intrathecal alpha 2-agonists tizanidine and clonidine and the somatostatin analog octreotide on an experimental rat model of tactile allodynia were investigated to determine the therapeutic potential for treating chronic neuropathic pain. Allodynia was induced by ligating the rat sciatic nerve. The mechanical threshold for paw withdrawal was assessed by applying von Frey hairs to quantify analgesic actions. ⋯ No side effect was observed at a 10-micrograms dose, at which the threshold was 88-96% of MPE. Intrathecal octreotide modestly increased the threshold to only 49-67% of MPE, showing a lesser analgesic effect, although no side effect was observed at a 4-micrograms dose. The antiallodynic effects of intrathecal tizanidine and clonidine were more potent than that of octreotide.