Table 2 Modified Ashworth Scale

From: The treatment of spasticity with Δ9-tetrahydrocannabinol in persons with spinal cord injury

0=No increase in muscle tone
1=Slight increase in tone with a catch and release or minimal resistance at end of range
2=As 2 but with minimal resistance through range following catch
3=More marked increase tone through ROM
4=Considerable increase in tone, passive movement difficult
5=Affected part rigid