Nerve innervation back to elbow

Trapezius

Spinal accessory nerve and branches of ventral primary rami of c3 and c4

Latissimus Dorsi

Thoracodorsal nerve

Levator scapulae

Dorsal scapular nerve and ventral primary rami of c3 and c4

Rhomboid minor

Dorsal scapular nerve

Rhomboid major

Dorsal scapular nerve

Deltoid

Axillary nerve c5-6

Supraspinatus

Suprascapular nerve

Infraspinatus

Suprascapular nerve

Subscapularis

Lower and upper subscapular nerve

Teres major

Lower subscapular nerve

teres minor

Axillary nerve

Pectoralis major

Lateral and medial pectoral nerves

Pectoralis minor

Medial pectoral nerve

Subclavis

Subclavis nerve

Serratus anterior

Long thoracic nerve

Biceps brachii

Musculocutaneous nerve

Coracobrachialis

Musculocutaneous nerve

Brachialis

Musculocutaneous nerve

Triceps brachii

Radial nerve

What passes through quadrangular space

Axillary nerve and posterior circumflex humeral vessels (artery and vein)

What are the borders of the quadrangular space

Teres minor

Surgical neck of humerus

Teres major

Long head of triceps brachii

What are the borders of the triangular space

Teres minor

Long head of triceps brachii

Teres major

What can you see in the triangular space

Circumflex scapular vessels

What is the clavipectoral fascia pierced by

Cephalic vein

Thoracoacromial artery

Lateral pectoral nerve