Axillary nerve

Question 1

Site of impingement

Answer 1

Quadrangular space

Question 2

Quadrangular space

Answer 2

made up of- teres major, teres minor, triceps long head and humerus

quadrangular space contains- axillary nerve and posterior humeral circumflex artery

Due to:
– humeral fractures
– dislocations
– poorly adjusted crutches (crutch palsy)

Signs and symptoms:
– teres minor and deltoid weakness
—- resulting in weak abduction of the shoulder

– loss of cutaneous sensation to superior posterior and lateral arm