week 4 anatomy 1-4

Question 1

What are the anatomical boundaries of the axilla?

Answer 1

1. apex 2. base 3. anterior wall 4. posterior wall 5. medial wall 6. lateral wall

Question 2

What defines the apex of axilla?

Answer 2

cervico-axillary canal; -Passageway between the neck and axilla bounded by the 1st rib, clavicle, and superior edge of scapula

Question 3

What defines base of axilla?

Answer 3

Bounded by the anterior and posterior axillary folds, the thoracic wall, and medial aspect of the arm. - It is formed by the concave skin, subcutaneous tissue and deep axillary fascia extending from the arm to the thoracic wall forming the axillary fossa (armpit).

Question 4

What defines the anterior wall of axilla?

Answer 4

Formed by pectoralis major and minor and the pectoral and clavicopectoral fascia associated with them. The anterior axillary fold is the inferior most portion of the wall that may be grasped by the fingers, formed by the pectoralis major as it bridges the from the thoracic wall to the humerus.

Question 5

What defines the posterior wall of axilla?

Answer 5

ormed chiefly by scapula and subscapularis on its anterior surface and inferiorly by teres major and latissimus dorsi. Posterior axillary fold is the inferior most portion of the posterior wall that may be grasped. It extends further inferiorly than the anterior wall and is formed by latissimus dorsi, teres major and overlying integument.

Question 6

What defines the medial wall of axilla?

Answer 6

formed by the thoracic wall (1st-4th ribs and intercostal muscles) and the overlying serratus anterior

Question 7

What defines the lateral wall of axilla?

Answer 7

narrow bony wall formed by the intertubercular sulcus in the humerus

Question 8

What is an OMT technique that acts on the axilla?

Answer 8

Pectoral traction

Question 9

What is pectoral traction?

Answer 9

Grasp the patient’s anterior axillary fold with both hands to engage the pectoralis major and minor muscles

Question 10

What does pectoral traction do?

Answer 10

stretches the muscles and deep fascia of the axillary space

Question 11

How do the branches of the axillary artery work?

Answer 11

3 segments: 1st segment has 1 branch ; 2nd segment has 2 branches ; 3rd segment has 3 branches ; She tastes like sweet apple pie ; screw the lawyer save a patient

Question 12

What is the branch of 1st segment of axillary artery?

Answer 12

1.Superior (or Supereme) thoracic artery (Screw)

Question 13

What are the branches of 2nd segment of axillary artery?

Answer 13

1. Thoracoacromial artery and 2. lateral thoracic artert (The Lawyer)

Question 14

What are the branches of 3rd segment of axillary artery?

Answer 14

1. Subscapular artery 2. Anterior circumflex humeral 3. posterior circumflex humeral (Save A Patient)

Question 15

What are the borders of 1st segment of axillary artery?

Answer 15

located between lateral border of first rib and medial border of pectoralis minor

Question 16

What are the borders of 2nd segment of axillary artery?

Answer 16

located posterior to pectoralis minor (is the portion of axillary artery that runs underneath pec minor)

Question 17

What are the borders of 3rd segment of axillary artery?

Answer 17

extends from lateral border of pectoralis minor to the inferior border of the teres major

Question 18

What are the muscles of the anterior compartment of the brachium?

Answer 18

1. biceps brachii 2. coracobrachialis 3. brachialis

Question 19

What is tha anterior compartment of the arm also known as?

Answer 19

Flexor compartment of arm

Question 20

Innervation of biceps brachii

Answer 20

Musculocutaneous nerve (C5, C6, C7);

Question 21

Innervation of coracobrachialis

Answer 21

Musculocutaneous nerve (C5, C6, C7);

Question 22

Innervation of brachialis

Answer 22

Musculocutaneous nerve (C5, C6) and Radial nerve (C5, C7);

Question 23

Blood supply of biceps brachii

Answer 23

Muscular branches of brachial artery

Question 24

Blood supply of coracobrachialis

Answer 24

Muscular branches of brachial artery

Question 25

Blood supply of brachialis

Answer 25

Muscular branches of brachial artery & recurrent radial artery

Question 26

What are the muscles of the posterior compartment of the brachium?

Answer 26

1. triceps brachii 2. anconeus

Question 27

What is the posterior compartment of the arm AKA?

Answer 27

extensor compartment

Question 28

Innervation of triceps brachii

Answer 28

Radial nerve (C6, C7, C8)

Question 29

Blood supply to triceps brachii

Answer 29

Branches of deep brachial artery

Question 30

Innervation of anconeus

Answer 30

Radial nerve (C7, C8, T1)

Question 31

Blood supply of anconeus

Answer 31

Middle collateral branch of deep brachial artery, recurrent interosseous artery