Week 4 Oral quiz flashcards Q1-4
What are the anatomical boundaries of the axilla?
- apex 2. base 3. anterior wall 4. posterior wall 5. medial wall 6. lateral wall
What defines the apex of axilla?
cervico-axillary canal; -Passageway between the neck and axilla bounded by the 1st rib, clavicle, and superior edge of scapula
What defines base of axilla?
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).
What defines the anterior wall of axilla?
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.
What defines the posterior wall of axilla?
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.
What defines the medial wall of axilla?
formed by the thoracic wall (1st-4th ribs and intercostal muscles) and the overlying serratus anterior
What defines the lateral wall of axilla?
narrow bony wall formed by the intertubercular sulcus in the humerus
What is an OMT technique that acts on the axilla?
Pectoral traction
What is pectoral traction?
Grasp the patient’s anterior axillary fold with both hands to engage the pectoralis major and minor muscles
What does pectoral traction do?
stretches the muscles and deep fascia of the axillary space
How do the branches of the axillary artery work?
3 segments: 1st segment has 1 branch ; 2nd segment has 2 branches ; 3rd segment has 3 branches!
What is the branch of 1st segment of axillary artery?
1.Superior thoracic artery
What are the branches of 2nd segment of axillary artery?
- Thoracoacromial artery and 2. lateral thoracic artert
What are the branches of 3rd segment of axillary artery?
- posterior circumflex humeral 2. anterior circumflex humeral 3. subscapular artery
What are the borders of 1st segment of axillary artery?
located between lateral border of first rib and medial border of pectoralis minor
What are the borders of 2nd segment of axillary artery?
located posterior to pectoralis minor (is the portion of axillary artery that runs underneath pec minor)
What are the borders of 3rd segment of axillary artery?
extends from lateral border of pectoralis minor to the inferior border of the teres major
What are the muscles of the anterior compartment of the brachium?
- biceps brachii 2. coracobrachialis 3. brachialis
What is tha anterior compartment of the arm also known as?
Flexor compartment of arm
Innervation of biceps brachii
Musculocutaneous nerve (C5, C6, C7);
Innervation of coracobrachialis
Musculocutaneous nerve (C5, C6, C7);
Innervation of brachialis
Musculocutaneous nerve (C5, C6) and Radial nerve (C5, C7);
Blood supply of biceps brachii
Muscular branches of brachial artery
Blood supply of coracobrachialis
Muscular branches of brachial artery
Blood supply of brachialis
Muscular branches of brachial artery & recurrent radial artery
What are the muscles of the posterior compartment of the brachium?
- triceps brachii 2. anconeus
What is the posterior compartment of the arm AKA?
extensor compartment
Innervation of triceps brachii
Radial nerve (C6, C7, C8)
Blood supply to triceps brachii
Branches of deep brachial artery
Innervation of anconeus
Radial nerve (C7, C8, T1)
Blood supply of anconeus
Middle collateral branch of deep brachial artery, recurrent interosseous artery
