Source:http://linkedlifedata.com/resource/umls/id/C0013528
MSH: Involuntary ("parrot-like"), meaningless repetition of a recently heard word, phrase, or song. This condition may be associated with transcortical APHASIA; SCHIZOPHRENIA; or other disorders. (From Adams et al., Principles of Neurology, 6th ed, p485),NCI: A symptom of neurologic or psychiatric dysfunction in which the individual involuntarily and meaninglessly repeats a recently heard word, series of words, or a song.