Tremor & Involuntary Movement
Tremors can be benign (essential tremor) or indicate Parkinson's disease, multiple sclerosis, or other neurological conditions. Characterizing tremor type — resting vs action, frequency, and distribution — is key to diagnosis.
Body System: Neurological
Related Diseases
- Parkinson's Disease — Resting tremor (pill-rolling) is a cardinal feature, caused by dopaminergic neuron loss in the substantia nigra.
- Multiple Sclerosis — Intention tremor in MS results from cerebellar demyelination affecting movement coordination.
Related Compounds
Frequently Asked Questions
What causes resting tremor?
Resting tremor is most characteristic of Parkinson's disease, caused by loss of dopamine-producing neurons. It typically starts unilaterally, at 4-6 Hz frequency, and improves with voluntary movement. DaTscan imaging can confirm dopaminergic deficit.
What is the difference between essential tremor and Parkinson's?
Essential tremor is an action tremor (worse during movement), bilateral, often familial, and responds to propranolol/alcohol. Parkinson's tremor is a resting tremor, typically unilateral at onset, accompanied by bradykinesia and rigidity, and responds to levodopa.