Anatomy 3: Pectoral Region, Axilla
1st part of Axillary artery pathway
begins at rib 1 & ends at pectoralis minor
3rd part of Axillary artery pathway
begins lateral to pectoralis minor & ends at inferior border of teres major
Axilla lateral wall
intertubercular sulcus
subclavius innervation
nerve to subclavius
Axilla function
passageway between cervical region and arm
2nd part of Axillary artery pathway
posterior to pectoralis minor
Sternal head of Pectoralis Major action
returns arm to coronal plane
Pectoralis Minor origin
ribs 3-5 (near costochondral junctions
subclavius insertion
1st costal cartilage
Pectoralis Major Action
Adduct arm & medially rotate arm
Serratus Anterior insertion
Anterior surface of medial border of scapula
Pectoralis Minor action
Depression, protraction, & inferior rotation of scapula
Axillary Vein
Junction of brachial veins and basilic vein near inferior border of teres major
Pectoralis Major Insertion
Lateral intertubercular sulcus (of humerus)
Pectoralis Major Innervation
Medial & Lateral pectoral nerves
Clavicular head of Pectoralis Major origin
Medial Half of Anterior Clavicle
Serratus Anterior action
Scapular protraction Superior rotation of scapula
Clavipectoral Fascia encircles (2 muscles)
Subclavius & pectoralis minor
Axillary artery branches- 3rd part (3 branches)
Subscapular artery Anterior humeral circumflex artery Posterior humeral circumflex artery
Axillary artery branches- 1st Part (1 Branch)
Superior (supreme) thoracic artery
Axillary artery branches- 2nd part (2 branches
Thoracoacromial trunk Lateral thoracic artery
Clavipectoral Fascia (a, n, v)
Thoracoacromial trunk arteries, lateral pectoral nerve, cephalic vein
Sternal head of Pectoralis Major origin
anterior surface of sternum & costal cartilages
Pectoralis Minor Insertion
coracoid process (of scapula)
Subclavius action
depress clavicle (resist lateral dislocation of clavicle)
Clavicular head of Pectoralis Major Action
flex arm
subclavius origin
inferior aspect of claviclve
axilla inlet
lateral margin of rib I clavicle superior margin of scapula to coracoid process
Serratus Anterior origin
lateral surface of ribs
Serratus Anterior innervation
long thoracic nerve
Pectoralis Minor innervation
medial pectoral nerve
axilla anterior wall
pectoralis major & minor muscles subclavius muscle clavipectoral fascia
axilla posterior wall
subscapularis, teres major, & latissimus dorsi muscles, & long head of triceps
axilla medial wall
upper thoracic wall serratus anterior muscle
