Uncoordinated movements, including an unsteady gait, caused by damage to or disease of the cerebellum (see BRAIN). Brain tumours, MULTIPLE SCLEROSIS and stroke can result in ataxia – as can excessive consumption of alcohol, and degeneration of the cerebellum as a result of inherited disease. Affected victims may have slurred speech, hand tremors and nystagmus (see under EYE, DISORDERS OF).