David has sustained an injury to his neck that has resulted in the complete loss of sensation to the posterior side of his upper arm and an inability to extend his index finger. which nerve has most likely been damaged as a result of his injury?

Answer;

Radial nerve

Explanation

-The nerve that is most likely to be damaged as a result of his injury is the radial nerve.

-The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb.

-It innervates the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin.