Rest | Low–medium (3–6) | While limb is relaxed and supported against gravity |
Juvenile Parkinson disease Medication induced (e.g., use of lithium, neuroleptics, anticonvulsants, immunosuppressants or β-adrenergic antagonists) Wilson disease
|
Action | | During voluntary muscle contraction | |
Postural | Medium–high (4–12) | While limb is held in position against gravity |
Physiologic tremor Essential tremor Drug withdrawal Neuropathy Metabolic disturbance
|
Kinetic |
Simple kinetic | Variable (3–10) | During simple limb movements |
|
Intention | Low (< 5) | During target-directed limb movements |
Cerebellar lesion (e.g., tumour, trauma, multiple sclerosis or stroke) Medication induced (e.g., use of lithium, neuroleptics, anticonvulsants, immunosuppressants or β-adrenergic antagonists) Alcohol induced
|
Isometric | Medium (4–6) | During muscle contraction against stationary objects |
|
Task specific | Variable (4–10) | During task-specific limb movements |
Handwriting tremor Musician’s tremor
|