Axilla and Brachial plexus Flashcards
Axilla walls
Anterior: pec major and minor
Posterior: lat dorsi, teres major and subscapularis
Medial: Serratus anterior
Lateral: Intertubercular sulcus of humerus
Base: skin and fascia of arm pit
Contents of Axilla
Fat and connective tissue
Axillary vein(not THE axillary) and lymphatics (outside sheath)
Cutaneous nerves
Axillary sheath: axillary a. and brachial plexus
Principal lymphatic node groups
Pectoral Subscapular humeral Central Apical
Pectoral node
Drains
Drains anterior thoracic wall and most of breast
Pectoral node
Location
Anterior wall near lateral thoracic vein and inferior border of pec minor
Subscapular node
Drains
Posterior thoracic wall and scapular region
Subscapular node
location
along subscapular vessels
Humeral node
Drains
Upper limb except for portion along cephalic vein
Humeral node
location
along lateral axilla and axillary vein
Central node
Drains what to where
humeral, subscapular, pectoral to apical
Central node location
deep to pec major
Apical node
Drains
Pectoral, subscapular, humeral, central, Proximal cephalic vein nodes
Cephalic vein location
Deltopectoral groove
Axillary sheath contains
Vessels, nerves, some lymphatics
Brachial plexus
_____ rami of (vertebral levels)
Serves
Ventral rami of C5-T1
All upper limb muscles except trapezius
Brachial plexus structure
Rami (5) upper neck Trunks (3) lower neck Divisions (6) behind clavicle Cords (3) axillary region Branches (5) upper arm
Musculocutaneous innervates
coracobrachialis
biceps
1/2 brachialis
Median nerve innervates
anterior forearm
3 thenar eminence mm
1st 2 lumbricals in hand
Ulnar nerve innervates
muscles of the hand
Flexor Carpi Ulnaris
ulnar 1/2 Flexor Digitorum Profundus
Axillary nerve innervates
deltoid
teres minor
Musculocutaneous nerve passes thru _____
coracobrachialis muscle
Ulnar Nerve runs behind _______
medial epicondyle
Axillary nerve circles ______ ______ in _____
behind humerus in quadrangular space
Axillary nerve innervates
deltoid
teres minor
