ankle clonus

Grade 4 ankle hyper reflexia is called ankle clonus.

Typically a patient is standing and walking on the balls of the feet with rigid legs and often with ankle clonus.

Neurologic examination of individuals with this mutation may show dysmetria in the upper extremities, hyperreflexia, distal amyotrophy and ankle clonus, in addition to spasticity, weakness and dysarthria.