UL: Axilla Flashcards
Branches of axillary artery
1st part: Superior thoracic artery
2nd part: Thoraco-acromial artery, lateral thoracic artery
3rd part: subscapular artery, anterior and posterior circumflex humeral artery
Which muscles splits axillary artery in 3 parts
pec minor
Branches of axillary artery
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Superior thoracic artery
Thoracoacromial artery
Lateral thoracic artery
Subscapular artery
Anterior humeral circumflex artery
Posterior humeral circumflex artery
Anterior wall of axilla made off
Pec major
Pec minor
Subclavius
Clavicopectoral fascia
Origin and insertion of pec major
Origin: Clavicle, Sternocostal, Aponeurosis of external oblique
To: Intertubercular sulcus of humerus
Origin and insertion of subclavius
Origin: 1st rib
To: middle 3rd of clavicle
Origin and insertion of Pec minor
Costal cartilage 3-5 to coracoid process
Innervation of pec major
Medial and lateral pectoral nerves
Innervation of subclavius
Nerve to subclavius
Innervation of pectoralis minor
Medial pectoral nerve
Actions of pec major
Adduction of shoulder
Actions of subclavius/pec minor
Pulls shoulder down
Clavicopectoral fascia covers which structures
Pec minor and subclavius
Structures through clavicopectoral fascia
2 going in: Cephalic vein, Lymph
2 coming out: lateral pectoral nerves, pectoral branch of thoraco-acromial artery
Medial wall of axilla made off
Seratus anterior
Origin and insertion of Seratus anterior
8-9 rib to medial scapula
Innervation of seratus anterior
Long thoracic nerve C5
Action of seratus anterior
Protraction and rotation of the scapula
Posteriro wall of axilla made off
Subscapularis
Teres major
Latissimus dorsi
Long head of triceps
Origin and insertion of subscapularis
subscapular fossa to lesser tubercle of humerus
Innervation of subscapularis
Upper and lower subscapular nerves
Action of subscapular muscle
medial rotation of arm at shoulder
Origin and insertion of latissimus dorsi
Spinous process of thoracic and lumbar vertebra, ilial crest and lower 3-4 ribs
To Intertubercular sulcus of humerus
Innervation of latissimus dorsi
Thoracodorsal nerve
Action of latissimus dorsi
Adduction and medial rotation
Veins of axilla
Routes of brachial plexus
C5 to T1
Trunks of brachial plexus
Superior
Middle
Inferior
Nerves of the route of brachial plexus
Long thoracic nerve
Dorsal scapular
Subclavius nerve
Nerves of the trunks of brachial plexus
Suprascapular nerve
Divisions of brachial plexus
Anterior and posterior
Cords of brachial plexus
Lateral
Posterior
Medial
(in relation to axillary artery)
Branches of posterior cord of brachial plexus
Upper subscapular
Thoracodorsal
Lower subscapular
Radial
Axillary
Branches of medial cord of brachial plexus
Medial pectoral nerve
Medial cutaneous nerve of arm
Medial cutaneous nerve of forearm
Ulnar
Median
Branches of lateral cord of brachial plexus
Lateral pectoral nerve
Musculocutaneous
Median
When does subclavian artery become axillary artery
Lateral border of 1st rib
When does axillary artery become brachial artery
inferior border of teres major
Terminal branch of musculocutanous
Lateral cutenous nerve of forearm (anterolateral forearm sensation)
