Unit One Axilla Flashcards
The axilla is located where
Medial and inferior to the glenohumeral joint and superior to the axillary fascia
Axilla located at what junction
Arm and thorax
Axilla serves as a passageway for
Neurovascular structures from the trunk to the upper extremity
Axilla passageway protected by
Musculofascial and bony structures
What causes exposure to axilla
Mobility of the UE
What are the axillary borders
Apex, base, and four walls
Four walls of axilla contain
Three muscular and one bony
Apex of axillary AKA
Thoracic outlet and cervicoaxillary canal
Apex of axilla serves as the passageway between
Neck and axilla
Apex of axilla bounded by
Clavicle, first rib and scapula
Apex of axilla conducts what to the upper extremities
Arteries, nerves, veins and lymphatics
Base of axilla is formed by
Skin, subcutaneous tissue and fascia extending from UE to the thorax
Base is located what level rib
4th rib
Is the base of axilla mobile
Somewhat depending on position of the upper limb
Axillary fascia is an extension of what fascia
Pectoral fascia
The axillary fascia is suspended by
Suspensory ligament
What are the walls of the axilla
Anterior, posteriorly, lateral and medial
Anterior wall of axilla formed by
Pectoralis Major and minor and the clavicopectoral fascia
Posterior wall of axilla formed by
Scapula and subscapularis on the anterior surface, inferiorly by teres major and latissimus dorsi
Medial wall of axilla formed by
Lateral thoracic wall (4th and 5th ribs) and serratus anterior
Lateral wall of axilla formed by
Intertubercular groove of humerus
What are the two main contents in the axilla
Axillary sheath and lymphatics
The axillary sheath of the axilla contains
Nerve, artery and vein
The axillary artery is an extension of what artery
Subclavian
Axillary artery starts where
Lateral border of the first rib
The axillary artery becomes the brachial artery where
Inferior border of teres major
What muscles is key to describing the axillary artery
Pectoralis minor
The axillary artery is divided into how many parts
Three
Part one of the axillary artery is where
Superior to pectoralis minor
Part one of the axillary artery has what branch
Superior thoracic artery
Superior thoracic artery supplies what
The first two anterior intercostal spaces
Part two of the axillary artery is where
Deep to pectoralis minor
What are the branches of part two of the axillary artery
Thoracoacromial trunk and lateral thoracic artery
What are the branches of the thoracoacromial trunk
Acromial, deltoid, pectoral and clavicular
Lateral thoracic artery supplies where
Serratus anterior
The lateral thoracic artery runs along with
Long thoracic nerve
The lateral thoracic artery has what branches to supply the breast tissue
Mammillary branche
Third part of the axillary artery is where
Inferior to pectoralis minor
Branches of the third part of the axillary artery
Subscapular, anterior humeral circumflex, posterior humeral circumflex
Branches of subscapular artery
Circumflex scapular and thoracodorsal artery
Third segment of the axillary artery branches to form a
Peri-scapular collateral circulation system with distal subclavian branches
The axillary vein lies where compared to the artery
Anteromedial
The axillary vein is formed by the union of
Brachial vein and basilic vein
Where does the union of the brachial and basilic vein occur
Inferior border of teres major
The axillary vein becomes the subclavian vein where
Inferior border of the first rib
Axillary veins are often
Plexiform and variable
Deep vessels in limbs usually have
2 veins running with artery
Axillary lymph nodes run from distal to proximal
Humeral subscapular pectoral, central, apical, Supraclavicular
