<prompt> Traumatic anterior dislocation of shoulder with sensory loss in lateral side of forearm and weakness of flexion of elbow joint, most likely injured nerve isradial nerveulnar nerveaxillary nervemusculocutaneous nerve  <response>: Ans. is d i.e.Musculocutaneous nerve Flexion at the elbow is brought about by- BrachialisBiceps brachi BrachioradialisTheir nerve supply :Brachialis -- Musculocutaneous nerveBiceps brachi - Musculocutaneous nerveBrachioradialis - Radial nerveSo the nerve injured is either musculocutaneous nerve or radial nerve.The cutaneous nerve supply of :Musculocutaneous nerve - lateral cutaneous nerve of forearm - skin of the lateral side of the forearmRadial nerve - Post. Cutaneous nerve of arm - Supplies skin on backlower lateral cutaneous nerve of armpost cutaneous nerve of forearm.- posterior aspect of fore armThus sensory loss in lateral side of forearm and weakness of flexion of elbow joint is due to injury to musculocutaneous nerve. 