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McGowan classification

Ulnar nerve injury

Grade 1

Purely subjective symptoms & mild hypaesthesia

Grade 2

Sensory loss & weakness of intrinsic hand muscles, with or without slight wasting

Grade 3

Severe sensorimotor deficit

Reference


The Results of transposition of the ulnar nerve for traumatic ulnar neuritis. Anna J. McGowan. The Journal of bone and Joint Surgery. Vol. 32B, no 3, August 1950.