Tremors are classified based on when they occur:
- Rest tremor: Happens when muscles are relaxed (common in Parkinson’s disease).
- Action tremor: Occurs during voluntary movements.
- Postural tremor: When holding a position against gravity.
- Kinetic tremor: With any voluntary movement.
- Intention tremor: During goal-oriented movements.
- Task-specific tremor: During specific tasks like writing.
- Isometric tremor: During muscle contraction without movement.