An<unk>  may follow an<unk>  nerve lesion which results in the partial or complete denervation of the<unk>  (medial) two lumbricals of the hand. Since the<unk>  nerve also innervates the 3rd and 4th lumbricals, which flex the MCP joints (aka the knuckles), their denervation causes these joints to become extended by the now unopposed action of the long finger extensors (namely the extensor digitorum and the extensor digiti minimi). The lumbricals and interossei also extend the IP (interphalangeal) joints of the fingers by insertion into the extensor hood; their paralysis results in weakened extension. The combination of hyperextension at the MCP and flexion at the IP joints gives the hand its<unk>  like appearance.<unk>  paradox The<unk>  nerve also innervates the<unk>  (medial) half of the flexor digitorum profundus muscle (FDP). If the<unk>  nerve lesion occurs more proximally (closer to the elbow), the flexor digitorum profundus muscle may also be denervated. As a result, flexion of the IP joints is weakened, which reduces the<unk> -like appearance of the hand. (Instead, the fourth and fifth fingers are simply paralyzed in their fully extended position.) This is called the<unk>  paradox" because one would normally expect a more proximal and thus debilitating injury to result in a more deformed appearance. Simply put, as reinnervation occurs along the<unk>  nerve after a high lesion, the deformity will get worse (FDP reinnervated) as the patient recovers - hence the use of the term "paradox". A simple way to remember this is: 'the closer to the Paw, the worse the<unk> '.
Ulnar claw
Nintendo thumb
Pelvic digit
Seal finger
Jaipur foot
Boot 
Finger cot
Axon hillock