Meaning of hyperkinesia

hy•per•ki•ne•sia

Pronunciation: (hī"pur-ki-nē'zhu, -zhē-u, -zē-u, -kī-), [key]
— n.
  1. an abnormal amount of uncontrolled muscular action; spasm.
  2. a disorder occurring in children and adolescents, characterized by excessive activity, extreme restlessness, impulsivity, and a short attention span.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.