Table 1.

Features of catatonia.

Symptom	Description of pathology
Stupor	decreased response to external stimuli, hypoactive behavior
Immobility	akinetic behavior, resistance to being moved
Waxy flexibility	slight resistance to being moved
Mutism	verbally unresponsive, refusal to speak
Posturing	purposely maintaining a position for long periods of time
Excitement	frantic, stereotyped or purposeless activity
Echolalia	senseless repetition of the words of others (echolalia)
Echopraxia	mimicking the movements of others
Staring	eyes fixed and open for long periods of time
Catalepsy	the passive adoption of a posture