Unusual immobility of posture and decreased sensitivity to pain. Causes include nervous disorders, Parkinson’s disease, epilepsy, and extreme shock, among others.
Example: A patient is observed standing immobile in a busy corridor for over an hour without regard to surroundings or passers by.
Grinnell, R. (2008). Catalepsy. Psych Central. Retrieved on September 4, 2015, from http://psychcentral.com/encyclopedia/2008/catalepsy/