| BMRC Motor Grade | Muscle strength |
| M0 | No movement is observed |
| M1 | Trace or flicker of movement or fasciculations seen |
| M2 | Muscle can exert movement when gravity is eliminated |
| M3 | Muscle can exert movement against gravity |
| M4 | Muscle strength is reduced but some movement against resistance |
| M5 | Normal movement |
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