<unk>  can vary from mild to severe motor dysfunction; it is generally characterized by unbalanced, involuntary movements of muscle and a difficulty maintaining a symmetrical posture. The associated motor dysfunction can be restricted to a part of the body or present throughout the body, depending on the individual and the severity of the symptom. One of the pronounced signs can be observed in the extremities in particular, as the writhing, convoluted movement of the digits.<unk>  can appear as early as 18 months from birth with first signs including difficulty feeding, hypotonia, spasm, and involuntary writhing movements of the hands, feet, and face, which progressively worsen through adolescence and at times of emotional distress.<unk>  is caused by lesions in several brain areas such as the hippocampus and the motor thalamus, as well as the corpus striatum; therefore children during the developmental age could possibly suffer from severe communication deficits such as speech impairment, hearing loss, and failed or delayed acquirement of sitting balance, although most people with<unk>  have normal or near-normal intelligence.
Athetosis
Ptosis 
Eryptosis
Cynanthropy
Periodontosis
Aphonia
Acrodynia
Hyperekplexia