Answer
Median Nerve
brachial plexus
Work Step by Step
brachial plexus, situated partly in the neck and partly in the axilla, gives rise to virtually all the nerves that innervate the upper limb.
The median nerve goes down to the forearm and branches into most of the flexor muscles and the skin and innervates the 5 intrinsic muscles of the lateral palm. IT activates muscles that pronates the forearm, flex the wrist, and fingers.