Echophenomenon (also known as echo phenomenon; from Ancient Greek ἠχώ (ēkhṓ) " echo, reflected sound") is "automatic imitative actions without explicit awareness" or pathological repetitions of external stimuli or activities, actions, sounds, or phrases, indicative of an underlying disorder. The echophenomena include repetition: * echolalia (syn. echophrasia) – of vocalizations (the most common of the echophenomena) ** echopalilalia – of words * echopraxia (syn. echokinesis, echomatism) – of actions, movements * echopathy – of actions or speech * echoplasia – physically or mentally, tracing contours of objects * echolalioplasia – involving sign language, described in one individual with Tourette syndrome ().

References

{{Reflist Tourette syndrome Schizophrenia