Table 1 Modified Medical Research Council system of grading elbow flexion

0

-

No contraction

1

-

Perceptible contraction in the muscle but no movement

2

Gravity Eliminated

A

Motion less than or equal to half range

B

Motion more than half range

C

Full range of motion

3

Against Gravity

A

Motion less than or equal to half range

B

Motion more than half range

C

Full range of motion

4

Motion Against Resistance

A

Able to lift less than 30% weight of the normal side through full range

B

Able to lift 30–60% weight of the normal side through full range

C

Able to lift more than 60% weight of the normal side through full range

5

Normal strength