ABSTRACT
A major component in the extremely diverse symptomatology of hysteria is some form of motor disturbance. It may include hyperkinetic symptoms, such as convulsive fits, tremors, contractures, impairments of gait and posture, rapid muscular fatigue, paresis or paralysis, hysterical spasms, or paralysis of the smooth musculature of internal organs. Signs of motor disturbances in monkeys subjected to experimental neurosis have been repeatedly noted by various authors. S. D. Kaminskii observed negativism, stereotypy, and instability of conditioned motor response in anubis baboons; their usual motor activity gave way to sluggishness. In the years 1962–1967, as establishing an experimental model of neurogenic gastric achylia in hamadryas baboons, observed several profound motor disturbances–convulsive attacks, paresis, paralysis and hyperkinesis in experimental animals. A striking form of motor disorganization is seen in baboons unable to stand or walk. Usually they move about in a sitting position, resting on the buttocks.
