neuropsychic weakness of various origins, a state of increased fatigue, irritability, emotional lability, due to the exhaustion of the central nervous system; It is characterized by rapid fatigue, inability to long-term exertion. At the same time, there is a decrease in all forms of mental activity, functions of the autonomic nervous system. Headaches, fluctuations in blood pressure, tachycardia and sleep disorders (difficulty falling asleep, superficial sleep, early awakening, daytime drowsiness) are characteristic. There is a variability of mood, instability of the emotional-volitional sphere, irascibility, irritability, tearfulness, aggressiveness, memory loss, increased fatigue, unproductive intellectual activity, motor disinhibition.