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Table 3 Modified MRC scale for evaluation of wrist function

From: The effect of perinatal brachial plexus lesion on upper limb development

Grade 0 No contraction or flicker of contraction
Grade 1 Active movement with gravity eliminated
Grade 2 Active movement against gravity only
Grade 3 Active movement against resistance with motion reaching ≤ 1/2 normal range
Grade 4 Active movement against resistance with motion reaching > 1/2 normal range
Grade 5 Normal power and range of motion
  1. Evaluation: grade 3 and 4 are functionally useful both in flexion and extension (F/E).