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1. A 22-year-old male comes to the emergency department aftersustaining a fall in a construction site, after proper evaluationyou notice that the patient has lack of sensation over the lateralaspect of the forearm, inability to abduct the upper limb andinability to flex the forearm. Which of the following is the mostlikely location of this patient’s injury?
   1. Musculocutaneous nerve
   2. C5-C6 Nerve roots
   3. Axillary nerve
   4. Medial brachial cutaneous nerve
   5. Ulnar nerve
2. A 36-year-old male comes to the office complaining of lack ofsensation in the medial aspect of the arm and forearm and a fewother symptoms. Which of the following is the most likely locationof this patient’s injury?
   1. Medial brachial cutaneous nerve
   2. Ulnar nerve
   3. Radial nerve
   4. Medial cord
   5. Axillary nerve
3. A 19-year-old male comes to the ED after being stabbed in aspace limited by the teres major and minor, the humerus and thelong head of the triceps. Which of the following signs do youexpect to find in the physical evaluation?
   1. Lack of flexion of the forearm
   2. Lack of sensation over the lateral aspect of the arm
   3. Lack of adduction of the arm
   4. Lack of sensation over the medial aspect of the forearm
   5. Lack of sensation over the clavicle

1. A 22-year-old male comes to the ED after being stabbed in theaxillary fossa. After stabilization and proper surgical evaluationan injury the portion of the brachial plexus lateral to theaxillary artery. Which of the following signs do you expect to findin the physical evaluation?
   1. Weakness of supination of the forearm
   2. Lack of sensation of the medial aspect of the arm
   3. Lack of sensation of the medial aspect of the forearm
   4. Lack of extension of the forearm
   5. Lack of sensation of the lateral aspect of the arm