It has features resembling other complex tics such as echolalia or coprolalia, but, unlike other aphasias, palilalia is based upon contextually correct speech.
[4] Palilalia occurs most commonly in Tourette syndrome and may be present in neurodegenerative disorders like Alzheimer's disease and progressive supranuclear palsy.
[5] AB, a 60-year-old male was diagnosed with idiopathic Parkinson's disease and had noticed changes in gait, posture, writing, and speech.
Such results indicated not all palilalic repetitions show an increasing rate with decreasing volume, and defied the two distinct subtypes of palilalia as suggested by Sterling.
[5][9] A case study by Tyrone and Moll examined a 79-year-old right-handed deaf man named PSP who showed anomalies in his signing.
In contrast to stuttering or logoclonia, palilalic repetitions tend to consist of complete sections of words or phrases,[5] are often repeated many times,[11] and the speaker has no difficulty initiating speech.