الفهرس 
REVIEW OF LITTERATEUROnly 14 pages are availabe for public view
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Abstract
A high proportion of neurological diseases are characterized by movement disorders. There has been increasing awareness that most pattern of involuntary movements have an organic basis. Psychogenic explanations should be considered with caution. Movement disorders tend to results predominantly in either poverty of movement associated with rigidity (akinetic-rigid syndromes) or abnormal involuntary movements (dyskinesias). Tremor is the most common of all movement disorders. It is a rhythmical, sinusoidal involuntary movement, also, it may be postural tremor (e.g. physiological, essential, orthostatic), rest tremor (e.g. Parkinson’s disease), or kinetic tremor (e.g. in brain stem or cerebellar disease). Chorea is a hyperkinetic involuntary movement disorder which has many causes and comprises flowing, irregular, purposeless, unpredictable and brief jerky movements which appear to flee from one part of the body to another randomly.