<unk>  head<unk> s (IHT) in<unk>  are characterized by involuntary lateral or vertical movement of the head.<unk>  head<unk> s are ordinarily considered a benign disease characterized by uncontrollable head<unk> s of spontaneous initiation and cessation. These head<unk> s are considered<unk>  because the cause is not apparent, but nervous system disorders, seizures and head injuries may be significant contributors of<unk> . Head<unk> s are usually not associated with any other symptoms, although some<unk>  have other signs of disease in addition to head<unk> s.
Idiopathic head tremor in dogs
Infantile convulsions and choreoathetosis
Acute cerebellar ataxia of childhood
New Brunswick neurological syndrome of unknown cause
Incontinentia pigmenti achromians
Autosomal dominant nocturnal frontal lobe epilepsy
Bobble-head doll syndrome
Paroxysmal kinesigenic choreoathetosis