The 'ape-thumb deformity' occurs due to lesion of:
Ans. B. Median nerveThe 'ape-thumb deformity' is lack of ability to abduct and oppose the thumb due to paralysis of the thenar muscles. It can occur with an injury of the median nerve either at the elbow or the wrist, impairing the thenar muscles and opponents pollicis muscle.
Radial nerve
Median nerve
Ulnar nerve
Musculocutaneous nerve
Upper Extremity