Exam #6_Lab: Axillary Fossa

Question 1

What are the four principal contents of the axillary fossa?

Answer 1

1) Brachial plexus
2) Axillary a.
3) Axillary v.
4) Axillary lymph nodes

Question 2

What is the axillary sheath? What is the function of the axillary sheath?

Answer 2

Axillary sheath= fascial sheath surrounding the axillary vessels & nerves

*****Function is to prevent spreading/ displacement during movement of the arm at the shoulder joint

Question 3

Describe the course of the axillary vein.

Answer 3

The axillary vein is a continuation of the brachial & bascilic veins

Question 4

What are the three parts of the axillary artery?

Answer 4

1st= First rib to pectoralis minor 
2nd= Posterior to pectoralis minor 
3rd= Pectoralis minor to teres major

Question 5

What is the branch of the first part of the axillary artery?

Answer 5

Superior thoracic a.

Question 6

What does the superior thoracic a. supply?

Answer 6

1st & 2nd intercostal spaces

Question 7

What are the branches from the second part of the axillary a.?

Answer 7

1) Thoracoacromial trunk

2) Lateral thoracic a.

Question 8

What are the branches of the thoracoacromial trunk? What is the mnemonic to remember these branches?

Answer 8

1) Acromial branch
2) Deltoid branches
3) Pectoral branches
4) Clavicular branches

“Cadavers Are Dead People”

Question 9

What muscles do the pectoral branches supply? What artery do they branch from?

Answer 9

• Pectoral m.

- Thoracoacromial trunk

Question 10

What does the lateral thoracic a. supply?

Answer 10

Serratus anterior m.

Question 11

What arteries arise from the third part of the axillary artery?

Answer 11

1) Subscapular a.
2) Anterior circumflex humoral
3) Posterior circumflex humoral

Question 12

What are the branches of the supscapular artery?

Answer 12

1) Circumflex scapular a.

2) Thoracodorsal a.

Question 13

What does the thoracodorsal artery supply?

Answer 13

Latissumus dorsi m.

Question 14

What is the difference between the thoracodorsal nerve & the long thoracic nerve?

Answer 14

Thoracodorsal= Lat. dorsi m.

Long thoracic= Serratus anterior

Question 15

Which is usually bigger, the anterior or posterior circumflex humoral a?

Answer 15

Posterior i.e. anterior is smaller

Question 16

What parts of the brachial plexus are visible in the apex of the axilla?

Answer 16

Cords i.e. medial, lateral, and posterior cords, which take their names from their relationship to the axillary a.

Question 17

What are the terminal branches of the lateral cord?

Answer 17

1) Musculocutaneous n.

2) Lateral head of median n.

Question 18

What muscle does the musculocutaneous nerve enter (& innervate)?

Answer 18

Coracobrachialis m.

Question 19

What are the branches of the medial cord?

Answer 19

1) Medial brachial/ medial antebrachial cutaneous
2) Ulnar n.
3) Medial head of the median n.

Question 20

What are the two branches of the posterior cord?

Answer 20

1) Axillary n.

2) Radial n.

Question 21

Where is the subscapularis m?

Answer 21

Anterior portion of the scapula