Axillary nerve

Question 1

What is the sensory innervation of the Axillary nerve?

Answer 1

The regimental badge area

Question 2

What is the motor innervation of the Axillary nerve?

Answer 2

Teres minor
Deltoid
Abductors of the arm at the shoulder

Question 3

What is the spinal root of the Axillary nerve?

Answer 3

C5 and C6

Question 4

What is the Quadrangular space?

Answer 4

Space for nerves and vessels to pass from the anterior arm to posterior arm

Question 5

What is the superior border of the Quadrangular space?

Answer 5

Subscapularis muscles

Teres minor

Question 6

What is the inferior border of the Quadrangular space?

Answer 6

Teres major

Question 7

What is the lateral border of the Quadrangular space?

Answer 7

Surgical neck of the Humerus

Question 8

What is the medial border of the Quadrangular space?

Answer 8

Long head of the Triceps Brachii

Question 9

What nerve does a branch of the Axillary nerve give rise to?

Answer 9

Lateral cutaneous nerve of the arm

Question 10

How does injury to the Axillary nerve commonly occur?

Answer 10

Anterior dislocation of the glenohumeral joint

Fracture of the surgical neck of the humerus

Question 11

How would an Axillary nerve injury present itself?

Answer 11

Patient would be unable to Abduct the arm

Question 12

Why is a patient with Axillary nerve damage unable to Abduct their arm?

Answer 12

The teres minor and deltoid are paralysed