athetosis

from WordNet (r) 3.0 (2006)

athetosis
    n 1: a continuous succession of slow, writhing, involuntary
         movements of the hands and feet and other body parts

from The Collaborative International Dictionary of English v.0.48

Athetosis \Ath`e*to"sis\, n. [NL., fr. Gr. ? not fixed; 'a priv.
   + ? to set.] (Med.)
   A variety of chorea, marked by peculiar tremors of the
   fingers and toes.
   [1913 Webster]