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

ScoreDescription
0No contraction
1Flicker or trace of contraction
2Active movement, with gravity eliminated
3Active movement against gravity
4Active movement against gravity and resistance
5Normal power

 

MRC Muscle Power Scale

MRC Muscle Power Scale 1


References

  1. Used with the permission of the Medical Research Council. Open Government Licence.

 

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