<unk>  also occurs in a variety of neurological disorders, occurring most commonly in Tourette syndrome, Alzheimer's disease, and progressive supranuclear palsy. Such degradation can occur in the substantia nigra where decreased dopamine production results in a loss of function. It can also occur in a variety of genetic disorders including fragile X syndrome, Prader-Willi syndrome, and autism.
Palilalia
Echolalia
Tachylalia
Coprolalia
Tourettism
Selective mutism
Akinetic mutism
Taurodontism