A neurological disorder of movement in which groups of muscles twist or contract involuntarily. Causes include drug side effects, trauma to the body, poisoning, or infection.
Example: A schizophrenic man experiences prolonged, painful spasms in his right arm soon after taking a dose of his neuroleptic medication.
Grinnell, R. (2008). Dystonia. Psych Central. Retrieved on May 30, 2015, from http://psychcentral.com/encyclopedia/2008/dystonia/