Definition of hyperkinesis in US English:


(also hyperkinesia)


  • 1Medicine
    Muscle spasm.

    • ‘Of the remainder, just under one in five had confirmed hyperkinesis.’
    • ‘The hyperkinesia is usually confined to one side of the body contralateral to a lesion in the subthalamic nucleus.’
    • ‘Symptoms but not impact fell significantly in children with hyperkinesis.’
    muscle spasm, muscular spasm, muscle contraction, muscular contraction, pang, twinge
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  • 2Psychiatry
    A disorder of children marked by hyperactivity and inability to concentrate.

    • ‘Childhood psychopathology is often persistent, particularly among children with conduct disorder and hyperkinesis.’
    • ‘Dystonia, parkinsonism, and hyperkinesia all occur in elderly, untreated people.’
    • ‘Behavioral problems such as hyperkinesis and aggressiveness have been associated with LKS.’


Mid 19th century: from hyper- ‘above normal’ + Greek kinēsis ‘motion’.