Semiology of movement disorders is varied. They are classified by movement type and syndrome. Parkinsonism is the most prominent hypokinetic syndrome; while among hypokinetic highlight dystonia, myoclonus, tic and chorea. The etiology is diverse, predominating pathophysiologically the dysfunction of basal ganglia and its cortical connections.Abnormal contraction of agonist and antagonist muscles takes place in dystonia, causing abnormal postures. Dystonias are classified according to the area of the body that is affected, clinical characteristics and etiology. More than twenty loci, previously named DYT loci, haven been identified in genetic dystonia.Chorea describes involuntary, purposeless and irregular movements. Several causes can lead to choreic movements, for example genetically determined diseases. Huntington's disease is an autosomal-dominant disease caused by a pathological triplet repeat expansion in HTT gene. It is a neurodegenerative disorder co-existing with multiple movement disorders (chorea, dystonia and parkinsonism).Primary and genetically determined dystonia as well as Huntington's disease and other primary chorea, are treated symptomatically.