<prompt> Ape thumb deformity is due to injury of which nerveRadial nerveUlnar nerveMedian nerveAxillary nerve  <response>: Ans. c Median nerveRef BDC Vol-1 Pg. 109,159; Clinical anatomy, Vishram Singh 58 Median nerve is the main nerve of the front of the forearm. It also supplies the muscles of thenar eminence. The ape hand deformity or ape thumb deformity of hand is due to paralysis of thenar muscles which is supplied by median nerve.Presenting Feature of Ape Thumb Deformity Thumb is laterally rotated and adducted Loss of thenar eminence Loss of opposition of thumb 