Unit 1: Lecture 11 Flashcards
Axillary Artery
Lateral extension of subclavian artery, and proximal root of brachial artery
Boundaries of axillary artery (medial and lateral)
medial: lateral border of 1st rib
lateral: lower border of the teres major muscle
How many parts of axillary artery?
3
Borders of different parts of axillary artery
First part: medial to pectoralis minor
Second part: inferior to pectoralis minor
Third part: distal to pectoralis minor
Branches of first part of Axillary Artery
highest thoracic artery (supplying 1st/2nd intercostal spaces, and upper part of serratus anterior)
Branches of second part of Axillary Artery
- thoracoacromial artery (pectoral muscles, subclavius, deltoid and acromion)
- lateral thoracic artery (serratus anterior)
Branches of third part of Axillary Artery
- subscapular artery (subscapularis and latissimus dorsi)
- anterior/posterior humeral circumflex arteries (joint capsule of G/H joint, & (post only) deltoid
Axillary vein
lies anterior to axillary artery (and outside axillary sheath)
Distally, what forms Axillary Vein?
Two brachial veins (lateral and medial; course with brachial artery) and one basilic vein (courses within superficial subcutaneous tissue)
Where do the brachial/basilic veins form the axillary vein?
At approximately the lower border of the teres major
Where does the axillary vein become the subclavian vein?
when it passes over the first rib
Brachial plexus
forms both the motor and sensory innervation for the upper limb
Anterior divisions of the upper and middle trunk form the…
lateral cord (C5 - C7)
Anterior divisions of the lower trunk forms the…
medial cord (C8 - T1)
Posterior divisions of all 3 trunks form the…
posterior cord (C5 - T1)
