Axilla and Arm Concepts/Structure Relations Flashcards
Apex of axilla
1st rib, clavicle
Base of axilla
skin of armpit
Anterior boundary of axilla
pectoral mm.
Posterior boundary of the axilla
scapula, subscapularis
medial boundary of the axilla
thoracic wall. serratus anterior muscle
lateral boundary of the axilla
humerus
What are the contents of the axilla?
axillary artery, axillary vein, axillary lymph nodes, 3 CORDS of the brachial plexus
Spinal nerves converge to form the ventral rami (and dorsal though we are not considering these)–> after which point:
axons become redistributed into peripheral nerves containing multiple spinal nerve segments
What nerves are excluded from the formation of plexuses?
intercostal nerves
EX: T1 spinal nerve is associated with T1 intercostal nerve
Is it the anterior or posterior rami of the spinal nerves that converge to form plexuses?
The anterior (ventral) rami converge to form plexuses
The axillary vein is
anterior to the axillary artery
The lateral thoracic artery passes along the lateral border of the
pectoralis minor muscle
The anterior and posterior circumflex humeral arteries branch off the ___________ at the level of the __________
axillary artery, surgical neck of the humerus
The anterior and posterior circumflex humeral arteries branch off the ___________ at the level of the __________
axillary artery, surgical neck of the humerus
The posterior circumflex humeral artery travels
posterior with the axillary nerve
quadrangular space
The thoracodorsal artery is the continuation of the ___________ inferior to the _______________
subscapular artery, circumflex scapular artery origin
The lateral cord of the brachial plexus
is lateral to the axillary artery
The medial cord of the brachial plexus
is medial to the axillary artery
The posterior cord of the brachial plexus is
posterior to the axillary artery
The musculocutaneous nerve pierces which muscle?
coracobrachialis
The median nerve runs _______ with the _____________
parallel, brachial artery
The radial nerve passes posterior to the humerus along with the _________
profunda brachii artery (triceps hiatus)
The tendon of the latissimus dorsi muscle attaches to the humerus in between the tendons
of teres major and pec major muscles
The long thoracic nerve is _________ to the surface of the serratus anterior muscle
immediately lateral (superficial)
The glenohumeral ligaments are
anterior to the glenohumeral joint
