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Table 1 Descriptions of Ashworth and Modified Ashworth Scales

From: Reliability of Ashworth and Modified Ashworth Scales in Children with Spastic Cerebral Palsy

Ashworth Scale
0 No increase in tone
1 Slight increase in tone giving catch when the limb is moved in flexion and extension
2 More marked increase in tone, but limb is easily flexed
3 Considerable increases in tone, passive movement difficult
4 Limb rigid in flexion or extension [17].
Modified Ashworth Scale
0 No increase in muscle tone
1 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(are) moved in flexion or extension
1+ Slight increase in muscle tone, manifested by a catch followed by minimal resistance through the remainder of the range of motion but the affected part(s) is(are) easily moved.
2 More marked increase in muscle tone through most of the range of movement, but the affected part(s) is easily moved.
3 Considerable increases in muscle tone, passive movement difficult
4 Affected part(s) is (are) rigid in flexion or extension