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Excessive and usually uncontrollable muscle movement.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



excessive, violent, involuntary movements that occur in cases of organic and functional disturbances of the nervous system. Hyperkinesia usually accompanies disturbances of the cerebral cortex, subcortical motor centers, or truncal part of the brain. Types of hyperkinesia include athetosis, chorea, Parkinson’s disease, and myoclonia (brief jerking of a muscle or muscle bundle with a lightning-fast pace of contraction).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The disorder classically affects older women, causing apical ballooning and basal hyperkinesis of the left ventricle.
The playwrights stuporous expression, the absence of dialogue, the abrupt, almost cinematic hyperkinesis of the fight, and the unresolved conclusion coalesce to make the account gorgeous as well as suggestive.
It was in the late 1960s and early 1970s that these signs crystallized into a distinctive syndrome or disorder, one characterized by exuberant and disruptive activity, or hyperkinesis. Frequently manifesting and being particularly disruptive in school, such problematic behavior obtained increasing interest by medical and educational professionals, but also from sociologists, most notably American sociologist Peter Conrad.
Peter Conrad notes that while the paradoxical effect of stimulants on some children was recognized in the 1930s, "hyperkinetic impulse disorder" was not conceptualized until the late 1950s and hyperkinesis did not become widely diagnosed and treated until the 1960s.
A transoesophageal echocardiogram performed immediately in the recovery room demonstrated severe wall motion abnormalities of the midventricular segments with apical sparing and hyperkinesis of the basilar segments.
In trials of sertraline on depressed children submitted by Pfizer, 8 of 189 subjects discontinued for aggression, agitation, or hyperkinesis (a coding term for akathisia), compared with 0 of 184 on placebo.
In rare cases, such dogs can suffer from a physiological disorder called hyperkinesis. This condition results in abnormal changes in neurotransmitters and can only be diagnosed by a veterinarian.
Specifically, cognitive/inattention problems, restless/impulsive symptoms, and the symptoms included in the Conners' ADHD index (attention problems, hyperkinesis, disorganization, distractibility, lack of persistence) occurred with a significantly greater severity in the older children with ADHD.
Hyperactivity, also called "hyperkinesis," actually can be the result of a medical condition that is characterized by frantic behavior, incessant movement resulting in exhaustion, a consistent elevated heart rate, panting, loss of weight, vomiting, and increased appetite or loss of appetite.
Food additives and hyperkinesis: A controlled-double blind experiment.
Attention-deficit/hyperactivity disorder (ADHD) was first described 100 years ago by Still and has been known as hyperactivity, hyperkinesis disorder of childhood, or minimal brain dysfunction (Seidman, Valera, & Bush, 2004).