a form of hyperkinesia characterized by regular, symmetrical, to-and-fro movements (at about 4 per second) that are produced by patterned, alternating contraction of muscles and their antagonists.
Health4All
a form of hyperkinesia characterized by regular, symmetrical, to-and-fro movements (at about 4 per second) that are produced by patterned, alternating contraction of muscles and their antagonists.