Modified Ashworth scale
The Modified Ashworth scale (MAS) measures resistance during passive soft-tissue stretching and is used as a simple measure of spasticity.[1] Scoring (taken from Bohannon and Smith, 1987): 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 moved in flexion or extension 1+ Slight increase in muscle tone, manifested by a catch, followed by minimal resistance throughout the remainder (less than half) of the ROM 2 More marked increase in muscle tone through most of the ROM, but affected part(s) easily moved 3 Considerable increase in muscle tone, passive movement difficult 4 Affected part(s) rigid in flexion or extension
References
http://www.rehabmeasures.org/Lists/RehabMeasures/PrintView.aspx?ID=902