Modified Ashworth Scale (spasticity grade)
Modified Ashworth Scale (Bohannon & Smith 1987): the ordinal 0 / 1 / 1+ / 2 / 3 / 4 grade of muscle-tone increase on passive movement.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Resistance to passive movement
- 1+ — slight increase: catch, then minimal resistance through < half…
Result: Modified Ashworth grade 1+: slight increase in muscle tone -- a catch, followed by minimal resistance through less than half of the range of motion.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Scale
- an ordinal per-muscle grade of resistance to passive movement: 0, 1, 1+, 2, 3, 4 (higher is more spastic). The "1+" level is the 1987 modification, a distinct step.
- Use
- graded per muscle group on passive range of motion; ordinal, not interval -- do not average across muscles.
What you enter
- Resistance to passive movement
How this is calculated
Bohannon RW, Smith MB. Interrater reliability of a modified Ashworth scale of muscle spasticity. Phys Ther. 1987;67(2):206-207. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.