hy·per·ki·ne·sia 
(hī′pər-kə-nēzhə, -kī-) also hy·per·ki·ne·sis (-sĭs)
(hī′pər-kə-nēzhə, -kī-) also hy·per·ki·ne·sis (-sĭs)n.
1. An abnormal increase in muscular activity.
2. Hyperactivity, especially in children.
[HYPER- + Greek kīnēsis, movement (from kīnein, to move; see keiə- in the Appendix of Indo-European roots) + -IA1.]