Psychophysiologic investigation of nocturnal sleep (Russian)

Thirty subjects (some healthy and others suffering from neuroses) awoke during delta sleep and rapid sleep. Their accounts after awakening were compared with the results of polygraphic investigations. In delta sleep more often than in rapid sleep a negation of the previous sleep was encountered. The fact that comprehensive accounts about the dreams during rapid sleep correlate with the accelerated pulse rate at this phase, was not connected with the relative value of pulse variability and REM intensity, and was more frequently recorded in the case of awareness of sleep in delta sleep. After awakening from rapid sleep, the subsequent alertness lasted longer than after awakening from delta sleep. The patients gave fewer accounts about the dreams, and there was frequent slowing of the pulse rate in rapid sleep and a low Rem intensity. The causes of amnesia of the dream contents are discussed both in the case of low and high Rem intensity.