- Action tremor which is normally present in everyone, enhanced by meds or other stimuli
- Symmetric action tremor
- Can affect arms and legs
- Made worse w/exposure to particular meds (e.g. SSRIs, valproate, prednisone, b-agonits), caffeine, smoking, anxiety/stress, other
- No other assoc neuro sx
- Can vary in degree based on timing exposure to particular stimuli