Unlike the cerebrum, cerebellar disease causes problems on the SAME SIDE of the body as the the cerebellar lesion.Seen in any process that causes damage to the cerebrellum (stroke, tumor, multiple sclerosis, chronic alcohol abuse, certain medications).Usually associated with other cerebellar findings.Slow action tremor that most commonly occurs with purposeful movement (such as in doing finger to nose test).Differentiate from Parkinson by noting absence of resting tremor, rigidity, bradykinesia, etc.Classically, tremor decreases with EtOH, worsens with stress.Classically affects head and/or speech.Mainly a postural tremor but if worsened, will occur at rest.Progressive, may appear at anytime of life but most commonly >70 years.Most common involuntary movement disorder, typified by a rapid postural tremor most often of the upper extremities."Essential" Tremor (ET) (Kinetic Tremor / Familial Tremor) anxiety, fear, physical exhaustion, hypoglycemia, hyperthyroidism, alcohol withdrawal.Present in almost everyone and a normal finding that usually cannot be seen unless worsened in certain situations that include:.Hemiballismus: wild, large-amplitude, flinging movements on one side of the body, commonly affecting proximal limb muscles but can also affect the trunk.Dystonia: Sustained or repetitious muscular contractions, often produces abnormal posture.Athetosis: Writhing movements, mostly of arms and hands.Often rapid and may involve proximal or distal muscle groups. Chorea: Dance-like, unpatterned movements, often approximate a purpose (e.g.Myoclonus: Shock-like, arrhythmic twitches.Tics: Paroxysmal, stereotyped muscle contractions, commonly suppressible, might be simple (single muscle group) or complex.Tremor: Rhythmic oscillations caused by intermittent muscle contractions.This page describes the diagnosis of the major categories of hyperkinetic movement disorders. Recognition of involuntary movements associated with hyperkinetic movement disorders is an important diagnostic skill. Involuntary movements compose a group of uncontrolled movements that may manifest as a tremor, tic, myoclonic jerk, chorea, athetosis, dystonia or hemiballism.
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