The assessment of muscle power is a key part of a neurological examination of the upper or lower limbs. As a result, it is important to familiarise yourself with the Medical Research Council’s scale (MRC scale) of muscle power. The MRC scale of muscle strength uses a score of 0 to 5 to grade the power of a particular muscle group in relation to the movement of a single joint.
We have included the MRC scale below in several formats, to make it as accessible as possible:
MRC Muscle Power Scale
|1||Flicker or trace of contraction|
|2||Active movement, with gravity eliminated|
|3||Active movement against gravity|
|4||Active movement against gravity and resistance|
- Used with the permission of the Medical Research Council. Open Government Licence.