THE ROLE OF THE NUCLEUS LATERALIS MAMILLARIS OF THE HYPOTHALAMUS IN RESPIRATORY NEURONS IN HYPOXIA CONDITIONS

Abstract

In the normal as well as in the oxygen deficiency conditions research has been made to study the influence of irritation of lateral mamillary (LM) nucleus of the hypothalamus on impulse activity of respiratory neurons of medulla oblongata. In conditions of normal atmospheric pressure the electrical stimulation of the LM nucleus has had mainly activiting influence. In the initial phase, on 4–5 thousand meter altitude, activation of frequent discharge of neurons occurred. In this situation stimulation of the LM induced uncharacteristic reactions of those neurons. In the second phase (7.5–8 thousand meters) on the reduction of the impulse activity of neurons, stimulation LM nucleus of hypothalamus was more accentuated than in conditions of normoxia.