Definitions of the Modified Tardieu Scale and the Modified Modified Ashworth Scale
| Grade | Modified Tardieu Scale (Boyd and Graham27) | Modified Modified Ashworth Scale (Ansari et al15) |
|---|---|---|
| 0 | No resistance throughout the course of the passive movement | No increase in muscle tone |
| 1 | Slight resistance throughout the course of the passive movement, with no clear catch at precise angle | Slight increase in muscle tone, manifested by a catch and release or by minimal resistance at the end of the range of motion when the affected part(s) is moved in flexion or extension |
| 2 | Clear catch at precise angle, interrupting the passive movement, followed by release | Marked increase in muscle tone, manifested by a catch in the middle range and resistance throughout the remainder of the range of motion, but affected part (s) easily moved |
| 3 | Fatigable clonus (<10 s when maintaining pressure) occurring at precise angle | Considerable increase in muscle tone, passive movement difficult |
| 4 | Infatigable clonus (>10 s when maintaining pressure) occurring at precise angle | Affected part(s) rigid in flexion or extension |