Chorea, or Chorea Sancti Viti (Latin for “St. Vitus’ dance”) is an involuntary movement disorder characterized by abrupt, purposeless, patternless involuntary movements. Causes include Huntington’s disease and drug side effects.
Example: The patient presents a series of abnormal movements which are quick and unpredictable, involving many muscle groups.
Grinnell, R. (2008). Chorea. Psych Central. Retrieved on August 31, 2015, from http://psychcentral.com/encyclopedia/2008/chorea/