The Clinical Rating Scale for Tremor (CRST) is a standardized instrument to assess the severity and functional impact of tremor, particularly in conditions such as Essential Tremor and Parkinson’s Disease.
It is divided into three parts:
| Item | Description | Score (0–4) |
|---|---|---|
| Rest tremor | Face, lips, chin, tongue, hands | |
| Postural tremor | Arms outstretched | |
| Kinetic tremor | Spiral drawing, pouring water | |
| Intention tremor | Finger-to-nose | |
| Total Part A |
| Task | Description | Score (0–4) |
|---|---|---|
| Handwriting | Legibility, steadiness | |
| Drawing spiral (right) | Circle symmetry and amplitude | |
| Drawing spiral (left) | Circle symmetry and amplitude | |
| Pouring water | Between two cups | |
| Total Part B |
| Activity | Description | Score (0–4) |
|---|---|---|
| Speaking | Intelligibility | |
| Feeding | Use of utensils, spillage | |
| Hygiene | Tooth brushing, shaving | |
| Dressing | Buttons, zippers | |
| Working/social activities | Ability to perform tasks or socialize | |
| Total Part C |
Interpretation:
Applications: Used in clinical trials and treatment evaluation, including: