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What is "Pointing index" is due to paralysis of: and explain in detail?
Ans. is 'a' i.e. Median nerve Pointing index:On asking the pt. to make a fist, it is noticed that the index finger remains straight.This is d/t Paralysis of the flexor digitorum superficialis and that of lateral half of the flexor digitorum profundus muscle (to the index finger) in median nerve palsy at a level of proximal to elbow.*Some other related questions:* Wrist drop is seen in*-Radial nerve palsy* Foot drop is seen in*-Common peroneal nv palsy.Winging of the scapula*Claw hand(Main -en -griffe):-Long thoracic nerve palsy.* Partial claw hand*-Ulnar nerve palsy* Complete claw hand*-Ulnar +Median nerve palsy* Ape thumb deformity*-Median nerve palsy* Pointing index*-Median nerve palsy* Policeman's tip deformity*-Also k/a Erb's paralysis d/t injury in the region of the upper trunk of the brachial plexus.Nerve roots involved are mainly C5 & partly C6.