<prompt> Ape thumb deformity is seen in involvement of -Median nerveUlnar nerveRadial nerveAxillary nerve  <response>: Ape thumb deformity : in this the thumb is in the same plane as the wrist .It occurs due to paralysis of opponens pollicis muscle in median nerve injury at the wrist the unopposed action of extensor pollicis longus produces an ape like hand .The thenar eminence is wasted flattened .The thumb is adducted laterally rotated so that the first metacarpal lies in same plane other metacarpals. REF:Essential ohopedics ,Maheshwari ,5th edition , pg.no.64 