Anatomy Upper Limb I

Question 1

Demonstrate dermatomes of upper limb on yourself

Answer 1

C4, C5, C6, C7, C8, T1, T2

Question 2

Demonstrate cutaneous innervation of the hand

Answer 2

median nerve, ulnar nerve, radial nerve

Question 3

Describe the drainage of the superficial lymphatics of the upper limb

Answer 3

• superficial lymphatics originate from lymphatic plexus in the hand
• ascend with superficial veins and terminate in the apical axillary lymph nodes

cephalic vein - lymph nodes enter the apical axillary lymph nodes

basilic vein - lymph nodes enter the cubital lymph nodes

Question 4

Describe the drainage of the deep lymphatics of the upper limb

Answer 4

-ascend with the major deep veins in the upper limb and terminate in the humeral (lateral) axillary lymph nodes
radial vein
ulnar vein

Question 5

How does the right and left subclavian lymphatic trunks drain

Answer 5

-right subclavian lymphatic trunk is joined by the right jugular trunk to form the right lymphatic duct
joins the right venous angle to enter the right subclavian vein

-left subclavian lymphatic trunk joins the thoracic duct
enters the left brachiocephalic vein

Question 6

Describe the superficial venous drainage of the upper limb

Answer 6

• dorsal and palmar networks drain to cephalic (anterolateral) and basilic (posteromedial) veins
• connected in cubital fossa by median cubital vein
• basilic vein goes deep and joins brachial vein to form axillary vein
• cephalic begins in roof of anatomic snuff box and pierces clavipectoral fascia to join axillary vein

Question 7

Boundaries of the axilla

Answer 7

• base = level of 4th rib, forms the armpit
• apex = first rib, clavicle, superior scapula
• anterior wall = pectoralis minor and major, clavipectoral fascia
• posterior wall = scapula, subscapularis, teres major, latissimus dorsi
• lateral wall = intertubercular sulcus of humerus
• medial wall = 1-4th rib and serratus anterior

Question 8

Contents of the axilla

Answer 8

axillary sheath (axillary artery, axillary vein, brachial plexus), axillary lymph nodes, fat