Axillary Nerve Damagr

Question 1

What is the origin of the axillary nerve?

Answer 1

C5, C6

Question 2

What is the function of the axillary nerve?

Answer 2

Shoulder abduction

Question 3

What muscle is the axillary nerve associated with?

Answer 3

Deltoid muscle

Question 4

What injuries can result in damage to the axillary nerve?

Answer 4

Humeral neck fracture
Anterior dislocation

Question 5

What can damage to the axillary nerve result in?

Answer 5

Weakness of shoulder abduction

Question 6

What muscle is affected if there is axillary nerve damage?

Answer 6

Flattened deltoid

Question 7

What test can be used to diagnose axillary nerve damage?

Answer 7

Extension lag test

Question 8

What is the extension lag test?

Answer 8

Elevate patient’s arm to near full extension, and ask the patient to maintain the position

Question 9

What would be a positive extension lag test?

Answer 9

The test is positive if the arm drops

Question 10

What can also be affected by damage to the axillary nerve?

Answer 10

Sensory disturbance to the lateral deltoid, around the ‘regimental patch’.