Echo phenomenon is automatic imitative actions wihtout explicit awareness, or pathological repetitions of external stimuli or activities, actions, sounds, or phrases, indicative of an underlying disorder.
Classification
Echolalia, of vocalizations, the most common
Echopraxia, of actions
Echomimia, of facial expressions
Echographia, in writing
Echoplasia, physically or mentally, tracing contours of objects
Echolalioplasia, involving sign language, described in 1 individual with Tourette syndrome
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