To investigate the functions of the amygdala in limbic system, changes in heart rate and body temperature resulting from electrical destructions of amygdala centralis and piriform cortex were observed in a total of 40 rats varying in weight from 180 to 250g with the use of stereotaxic apparatus(Reyniers and Sons). The results were as follows; 1) Bilateral destructions of amygdala centralis revealed a tendency to increased heart rate and decreased rectal temperature. 2) Bilateral destructions of piriform cortex revealed no changes in heart rate and rectal temperature. Therefore, it is assumed that cardiovascular and temperature responses are not significantly resulted from the electrical destructions of amygdala centralis and piriform cortex.
Amygdala ; Animals ; Body Temperature ; Heart Rate ; Limbic System ; Rats

To investigate the variations of the dorsal root of the first cervical nerve and its anastomosis with the spinal accessory nerve, a total of 74 anatomical dissections has been performed in 37 cases of Korean human fetus. The anastomotic connections between the dorsal roots and the spinal accessory nerve have fitted into five main types. The central course of the sensory fibers of the first cervical nerve and the neurosurgical significance of the variations have been discussed. Often the only pathway for the sensory fibers of the first cervical nerve to reach the spinal cord is through the rootlets of the spinal accessory nerve.
Accessory Nerve ; Fetus ; Humans ; Spinal Cord ; Spinal Nerve Roots*

This study has been made to stress the importance of fracture pattern of the posterior fossa for recognition of traumatic lesions in the posterior fossa. Included in the series are all the cases of clinically significant verified lesions in the posterior fossa due to posterior fossa fractures. The classification of posterior fossa fractures introduced here by author has been based on the linear fracture involving the transverse sinus groove and/or the foramen magnum in Towne's projection. Five types of pattern have occurred. In type I, a linear fracture involves the transverse sinus groove and the foramen magnum. In type II, a linear fracture involves the transverse sinus groove but not the foramen magnum. In type III, a linear fracture involves the lambdoid suture, the transverse sinus groove and the foramen magnum. In type IV, a linear fracture involves the lambdoid suture and the transverse sinus groove, but not the foramen magnum. In type V, a linear fracture of the suboccipital bone involves the foramen magnum, but not the transverse sinus groove. In a total of 33 cases of posterior fossa fracture, 13 cases(39.3%) are of type I, 7 cases(21.2%) are of type II, 5 cases(15.2%) are of type III, 5 cases(15.2%) are of type IV, 3 cases(9.1%) are of type V. It has been shown that the cerebellar hematomas have been verified in type I, epidural and subdural hematomas verified in all the types without regard to the fracture patterns, and subdural hygromas verified in type I, III and V.
Classification ; Foramen Magnum ; Hematoma ; Hematoma, Subdural ; Subdural Effusion ; Sutures

The authors report 2 cases of pseudotumor cerebri in which ventriculoperitoneal shunting procedures have been performed to relieve intracranial hypertensions, and satisfactory results have been obtained.
Pseudotumor Cerebri* ; Ventriculoperitoneal Shunt*

The authors report a rare case of reticulum cell sarcoma-microgliomatosis which was extended into the leptomeninges, the Virchow-Robin spaces and choroid plexus invading the cerebral parenchyma in the left temporal area. Histogenesis of this tumor is briefly discussed.
Brain* ; Choroid Plexus ; Lymphoma, Non-Hodgkin* ; Reticulum*

Of all the potentially lethal complications of the head injury, extradural hemorrhage is the most readily diagnosed and remediable, yet the mortality rate remains distressingly high. The authors report on 58 consecutive patients with extradural hematoma. The mortality was 31%. The classical clinical course with a lucidal interval was seen in three patients only. The classical neurological signs of an extradural hematoma, contralateral hemiparesis, and ipsilateral third nerve palsy were seen in 9 patients(15.5%). The main factors associated with increased mortality were concomitant brain injury, rapid development of the hematoma and unconsciousness at the time of operation. In almost half of the fatal cases, there was a delay in the diagnosis and operation. Consequently better results are possible with better organization of the supervision and treatment of brain injured patients.
Brain ; Brain Injuries ; Craniocerebral Trauma ; Diagnosis ; Hematoma* ; Hemorrhage ; Humans ; Mortality* ; Oculomotor Nerve Diseases ; Organization and Administration ; Paresis ; Unconsciousness

The authors describe a case of ossiculum terminale in which a new technique of posterior cervical fusion for the reduction of atlantoaxial dislocation has been attempted, and satisfactory stabilization and restoration of normal contour of the cervical spine have been obtained by double wiring technique.
Dislocations* ; Spine

The authors analyze arbitrary 100 cases of skull fractures and compare with the incidence and character of the complication of head injuries associated with a skull fracture. Age, sex, cause of injury, skull fracture, intracranial hemorrhage, mortality rate and sequelae are discussed.
Craniocerebral Trauma ; Incidence ; Intracranial Hemorrhages ; Mortality ; Skull Fractures* ; Skull*

Although a great deal has been written about porencephaly during the past 100 years, there is much that remains obscure. The clinical recognition of porencephaly is important because it occurs with sufficient frequency to require consideration in the differential diagnosis of focal cerebral lesions. The authors considered and discussed to fulfill the pathogensis for this case.
Diagnosis, Differential

The penicillin produces seizures when applied directly to cerebral cortex and, in some instances, when given systemically in large amounts. Most studies with this agent have had as their goal the elucidation of neurophysiological mechanisms underlying seizure activity. The present study was undertaken to explore the biochemical events which take place in the presence of an epileptogenic agent and, in particular, to see whether this agent has a direct effect on passive or active cation transport or an effect on energy production within neural tissues. The penicillin-induced seizure activity has been produced by direct injection of an aqueous penicillin G sodium into the cerebral subarachnoid space in rat. It is assumed that penicillin-induced seizure results from the leakage of potassium ions from intracellular compartment and alteration of firing properties of neurons with prolonged depolarization, and disturbances in activities of enzyme involved in glutamine metabolism. Diphenylhydantoin may stimulate cation pumping with activation of (Na+-K+)-ATPase enzyme system and this action may be relevant to its anticonvulsant activity.
Animals ; Cation Transport Proteins ; Cerebral Cortex ; Fires ; Glutamine ; Ions ; Metabolism ; Neurons ; Penicillin G ; Penicillins ; Phenytoin ; Potassium ; Rats ; Seizures* ; Subarachnoid Space