NIH Common Data Elements (CDE) Repository

General Details:

Value	Code Name	Code Description
0	No increase in muscle tone	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	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	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	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	Considerable increase in muscle tone, passive movement difficult
4	Affected part(s) rigid in flexion or extension	Affected part(s) rigid in flexion or extension

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Document:: Bohannon R and Smith M. Interrater reliability of a modified Ashworth scale of muscle spasticity. Physical Therapy 1987;67(2):206. Katz R, Rovai G, et al. Objective quantification of spastic hypertonia: correlation with clinical findings. Arch Phys Med Rehabil. 1992 Apr;73(4):339-47.