Naoshige Maruyama

REGULATORY INFLUENCE OF AMYGDALOID NUCLEI UPON THE UNITARY ACTIVITY IN VENTROMEDIAL NUCLEUS OF HYPOTHALAMUS

Under barbiturate anesthesia, the unitary activity of the ventromedial nucleus of the hypothalamus of 10 adult cats was picked up with the use of glass pipette electrodes, and the electrical stimulation on the three principal nuclei (lateral, medial and intermediate) of the amygdaloid nuclear complex was observed with reference to spike activities.

ACTIONS OF STIMULATION TO MEDULLARY PYRAMID ON SINGLE NEURONS IN CAT'S MOTOR CORTEX By

The electrical activities of single neurons in the anterior sigmoid gyrus of 45 adult cats were picked up intracellularly or extracellularly by means of microelectrode technique. The response patterns elicited by single shock applied to the medullary pyramid were recorded.

Software system for real-time discrimination of multi-unit nerve impulses.

We have developed a computer program to separate a unit of interest from multi-units of nerve impulses on an on-line, real-time operation basis. This method is divided into two phases: (1) the learning phase; (2) the hunting phase. In the learning phase, the user specifies spike patterns of a random unit from among varied spike trains displayed on CRT. The template for the unit is also constructed. In the hunting phase, the detection of spikes is carried out followed by almost simultaneous template-matching. As soon as a spike is established to be identical with the learned pattern, time information is delivered to the main memory of the computer.

A new intelligent terminal for clinical computer network

An intelligent terminal has been developed to provide the clinical staffs with a means of utmost simplicity to communicate with the computer. Only 16 keys and a single switch are all which are involved in any terminal operation. The members of the operating system are the interpreter of TEXTOR (a language developed in this study), editor, monitor, and data-communication handler. This system configuration greatly reduces the cost for data communication compared with the conventional communication systems.

Some Observations on the Neuronal Mechanism of Opto-Kinetic Nystagmus

Unitary activities were recorded from the oculo-motor nucleus and optic nerve in rabbits by means of super-fine microelectrodes with the aim of clarifying the neuronal mechanism concerned in the reflex arc of op-tokinetic nystagmus.1)The unitary activities of oculo-motor neurons when optic nystagmus was elicited were as followsThe discharge rate increased or decreased gradually upon rotating the optical cylinder until it reached a certain rate, which continued to the beginning of nystagmus. the impulse to the ocular muscle which rested in the quick phase decreased promptly to a minimum rate just before the beginning of the quick phase and increased gradually during the slow phase. the change in the discharge rate of the impulses to the ocular muscle which contracted in the quick phase corresponded to the course of nystagmus.2)The eye speed in the slow phase of nystagmus which was recorded with electronystagmography was accelerated towards the nasal side when discharges of an optic nerve fiber which was pr...