<unk>  is characterized by brief, semi-directed, irregular movements that are not repetitive or rhythmic, but appear to flow from one muscle to the next. These 'dance-like' movements of<unk>  often occur with athetosis, which adds twisting and writhing movements. Walking may become difficult, and include odd postures and leg movements. Unlike ataxia, which affects the quality of voluntary movements, or Parkinsonism, which is a hindrance of voluntary movements, the movements of<unk>  and ballism occur on their own, without conscious effort. Thus,<unk>  is said to be a hyperkinetic movement disorder. When<unk>  is serious, slight movements will become thrashing motions; this form of severe<unk>  is referred to as ballism, or ballismus.
Chorea
Myoclonus
Dystonia
Opisthotonus
Paratonia
Opsoclonus
Athetosis
Clonus