Cerebral blood flow changes induced by electrical stimulation of the Gasserian ganglion after experimentally induced subarachnoid haemorrhage in pigs.

The effect of trigeminal electrical stimulation on cerebral blood flow has been studied in conditions of normal or reduced cerebral blood flow (CBF). Autologous blood was injected into the subarachnoid space of ten Pittmann-Moore pigs to induce subarachnoid haemorrhage (SAH) accompanied by cerebral blood flow (CBF) reduction. One week later, in six of ten animals, a considerable decrease of CBF was noted as evaluated by means of a recording-system monitoring over the right parieto-temporal calvarium the washout of 133Xenon injected into the internal carotid artery after the external carotid had been clamped.

Accidental high voltage electrocution: a rare neurosurgical problem.

The authors describe a case of accidental electrocution from a high voltage current in a young worker, who was struck by the electric shock in the mid-occipital region. The case is especially interesting due to the improbability of anyone surviving after receiving a shock of more than 1000 V., and to the development of bilateral parieto-occipital haemorrhagic infarction with spastic paraparesis, directly caused by the high voltage current and not indirectly by heat generation or secondary head trauma.

The posterior approach to cervical rizopathy.

The posterior approach to cervical rizopathy is a widely acquired technique; however only recently it encountered more favorable consideration. After a brief review of the literature, the Authors present some details of surgical approach, discuss its value and its limits with a comment on their own series.

[Biopsy and stereotaxic radiotherapy of cerebral gliomas].

The Authors report their experience on a series of 125 patients that underwent stereotactic biopsy. The procedure has proved reliable and almost risk -free. The diagnosis obtained from the bioptic specimen by smear technique-cytological examination and by paraffin embedding-histological examination are compared.

Spontaneous ("erosive") cerebrospinal rhinorrhea, with pneumococcal meningitis from anterior optic glioma. Case report.

A 6-year-old girl, operated upon for an optic nerve astrocytoma (resection limited to the intraorbital portion of the nerve), developed 3 years later symptoms and signs of chiasmatic invasion. Nine years after surgery (1980), she suffered from pneumococcal meningitis, due to cerebrospinal rhinorrhea that had been present in the last few years. A repeated neuroradiological investigation showed the site of the fistula and cerebral ventricles of normal size.