25: UE Arteries

Question 1

Three regions of the subclavian: relation to anterior scalene

Answer 1

1st: proximal to anterior scalene
2nd: deep to anterior scalene
3rd: distal to anterior scalene

Question 2

What does the internal thoracic A supply?

Answer 2

Anterior thoracic wall

Question 3

Ascending cervical A supplies?

Answer 3

Lateral muscles of superior neck

Question 4

Suprascapular A supplies?

Answer 4

Supraspinatus, infraspinatus

Question 5

What can the deep branch of the transverse cervical artery replace if present?

Answer 5

Dorsal scapular A

Question 6

Where does the supreme intercostal A travel?

Answer 6

In 1st intercostal space

Question 7

Deep cervical A supplies?

Answer 7

Deep cervical muscles

Question 8

Dorsal scapular A supplies?

Answer 8

Levator scapulae + rhomboids

Question 9

Where does subclavian A turn into axillary A?

Answer 9

Distal to first rib

Question 10

Three regions of axillary A in relation to pec minor M

Answer 10

1: proximal to pec minor
2: deep to pec minor
3: distal to pec minor

Question 11

Superior thoracic A supplies?

Answer 11

1st and 2nd intercostal spaces, superior portion of serratus anterior

Question 12

What can cause axillary aneurysms in region 1?

Answer 12

Repeated arm movements, like in baseball pitchers

Question 13

What can an axillary aneurysm do?

Answer 13

Compress the brachial plexus, causing pain and loss of sensation

Question 14

Four branches of the thoracoacromial trunk

Answer 14

1. Pectoral
2. Acromial
3. Clavicular
4. Deltoid

Question 15

Four muscles supplied by the lateral thoracic A

Answer 15

1. Pec major
2. Pec minor
3. Serratus anterior
4. Intercostal M’s

Question 16

Thoracodorsal A supplies?

Answer 16

Latissimus dorsi

Question 17

Three things supplied by circumflex humeral A’s

Answer 17

1. GH joint
2. Head of humerus
3. Surrounding musculature

Question 18

If there is a bleed in the arm and a surgeon ligases an artery, where would they want to ligate the artery to stop bleeding?

Answer 18

Distal to the subscapular A - if ligation is between thyrocervical trunk and subscapular, there will be a reversal of blood flow due to scapular anastomosis, and will continue to feed into the brachial A

Question 19

Where does axillary artery become brachial artery?

Answer 19

Distal to teres major

Question 20

What N does the deep brachial A travel with?

Answer 20

Radial N

Question 21

Two anastomoses in the lateral elbow + two in the medial elbow

Answer 21

Lateral
1. Middle collateral + interosseous recurrent
2. Radial collateral + radial recurrent
Medial
3. Superior ulnar collateral + posterior ulnar recurrent
4. Inferior ulnar collateral + anterior ulnar recurrent

Question 22

What N does the superior ulnar collateral A travel with?

Answer 22

Ulnar N

Question 23

Which is larger, radial A or ulnar A?

Answer 23

Ulnar A

Question 24

How does the ulnar A enter the hand?

Answer 24

Traveling over the flexor retinaculum

Question 25

How does the anterior interosseous A terminate?

Answer 25

Replaces the posterior interosseous A and feeds into the dorsal carpal arch

Question 26

What A produces the interosseous recurrent A?

Answer 26

Posterior interosseous

Question 27

Dorsal carpal arch

Answer 27

Formed by dorsal carpal branches of radial and ulnar A’s that wind around to the dorsal aspect of the hand

Question 28

What does the dorsal carpal arch give rise to?

Answer 28

Four dorsal metacarpal A’s

Question 29

What do dorsal metacarpal A’s form?

Answer 29

Dorsal digital A’s

Question 30

Which A mostly supplies the superficial palmar arch? Which mostly supplies the deep palmar arch?

Answer 30

Ulnar A -> superficial palmar arch | Radial A -> deep palmar arch

Question 31

Besides the radial and ulnar A’s feeding into the dorsal carpal arch, which other A does?

Answer 31

Posterior/anterior interosseous A