Degenerative disorders
• Parkinson's disease (idiopathic form, cause unknown)
• Progressive supranuclear palsy
• Hungtington's disease
• Lewy body dementia
• Spinocerebellar degeneration
Infection-related
• AIDS
• Neurosyphilis
Vascular parkinsonism
• Small ischemic infarcts in the brain (lacunar state)
Drug/Toxin induced
• Neuroleptic agents
• reserpine (Harmonyl)
• Carbon monoxide intoxication
• Manganese intoxication
Other disorders
• Hydrocephalus
• Brain tumors
• Subdural hematomas
• Post-traumatic