Functional hyperkinesis is a common disease of the nervous system. The main symptomatic basis is a nonspecific increase in the tone of the human motor system. The disease itself can be either temporary or chronic.
The main causes of functional hyperkinesis in adults are cerebral circulatory disorders, trauma during childbirth and spinal cord lesions. In children and adolescents, this disorder may be associated with trauma, brain infections, neurotoxic drugs, and alcohol toxicity. In very rare cases, hyperkinesis is associated with Parkinson's disease. Men suffer from this disease more often than women. At the beginning of the disease, only the muscles of the head and face are affected; with further progression, the problems begin to affect the body as a whole. Clinical manifestations can occur on any part of the body and begin suddenly. Hyperkinesis can be completely symmetrical or unilateral, involve any muscle group and have any degree of manifestation: from barely noticeable tremor to hyperkinesis affecting entire muscle groups.