Anatomy of Upper limb

Question 1

what are the 6 branches of the axillary artery

Answer 1

1. Superior thoracic
2. Thoracoacromial
3. Lateral thoracic
4. Subscapular
5. Anterior circumflex humeral artery
6. Posterior CH

Question 2

where does axillary artery started and end

Answer 2

1st rib to Teres major

Question 3

where does the posterior interosseous nerve exit antecubital fossa

Answer 3

Between two heads of supinator

Question 4

what does the median nerve innervate

Answer 4

Anterior flexor compartment for forearm

LOAF muscles of hand - lateral two lumbricals, opponens pollicis, abductor pollicis brevis and flexor pollicis brevis

Question 6

which artery crosses floor of anatomical snuffbox, before piercing first dorsal interosseous muscle to form deep palmar arch

Answer 6

radial artery

Question 7

the superficial palmar arch is a direct continuation of which artery

Answer 7

ulnar artery

Question 8

how does ulnar nerve enter the forearm

Answer 8

winding around posterior aspect of medical epicondyle of humerus, via two heads of flexor carpi ulnaris fibro-osseous channel (cubital tunnel)

Question 9

which muscles does ulnar supply

Answer 9

all of flexor carpi ulnaris and medial half of flexor digitorum profundus

Question 10

which nerves are susceptible to damage in mastectomy and axillary clearance and what are possible symptoms

Answer 10

long thoracic (motor) - winged scapula, via serratus anterior

intercostobrachial nerve (sensory) - loss of sensation in medial upper half of arm

Question 11

what aer the branches of posterior cord of brachial plexus

Answer 11

from all roots C5-T1

1. upper and lower subscapular nerves
2. thoracodorsal nerve
3. radial and axillary nerve

Question 12

which nerve vulnerable in fractures of surgical neck of humerus

Answer 12

axillary nerve - winds around humerus to supply teres minor and deltoid