MRC scale

Scoring of muscle strength

Grade 0

No contraction.

Grade 1

Flicker or trace contraction.

Grade 2

Movement with gravity eliminated.

Grade 3

Movement agains gravity.

Grade 4

Movement against resistance:
  • 4- for slight resistance
  • 4 for moderate resistance
  • 4+ for strong resistance

    • Grade 5

    Normal strength.

    Reference

    Greenberg's Handbook of Neurosurgery, 7th edition