Primer 22 - The Brachial Plexus Flashcards
Which are the muscles in the posterior wall of the axilla?
Subscapularis muscle, theres major, latissimus dorsi.
Serratus anterior, 1st-4th ribs and the associated intercostal muscles belong to
Medial wall of the axilla
What part of the humerus forms the lateral wall of the axilla?
Interrupter ulnar groove of the humerus
Which are the parts of the anterior wall of the axilla?
Pectoralis major, pectoralis minor
What is the cervicoaxillary canal?
Border by the first rib, the clavicle and the superior border of the scapula, it’s filled by the nerves and blood vessels running from between the neck and the upper extremity.
Which structure have to cross the subclavian artery and vein to change its name to Axillary artery?
They have to cross the inferior border of the First Rib.
What is the name of the Axillary artery after cross the inferior border of the Teres major muscle?
Brachial artery.
Which is the muscle it’s crossed by the Axillary artery when this one is divided?
Pectoralis minor.
Which is located the first branch from the axilla artery ?
The Superior Thoracic Artery is between the Inferior border of the first rib and the medial border of the pectoralis minor, minor contribution to supply the breast.
Which are the branches from thoracoacromial artery?
Clavicular, Acromial, Deltoid and Pectoral branches.
Which are the branches of the Axillary artery that is originated from the deep part of the pectoralis minor muscle?
1)Thoracoacromial artery. 2)Lateral thoracic artery.
Which structures are supplied by Lateral thoracic artery?
Supply blood to the serratos anterior to the pectoral muscles on the anterior wall of the axilla and the subscapularis on the posterior wall of the axilla, also supplies another part of the breast.
Which branch of the Thoracoacromial artery supplies the pectoralis muscles and the breast?
Pectoral branch.
Which branch of the Thoracoacromial artery supplies the deltoid and the anastomoses network over the Acromion?
Acromial branch.
Which branch of the Thoracoacromial artery supplies the esternoclavicular joint and the subclavian muscle?
Clavicular branch.
Which branch of the Thoracoacromial artery supplies the pectoral muscles and the deltoid ?
Deltoid Branch.
Where is the third part of the Axillary artery?
It is between the lateral border of the pectoralis minor and the inferior border of the Teres major.
Which are the 3 branches that comes from the third part of the Axillary artery?
1)Anterior circumflex humeral artery. 2)Posterior circumflex humeral artery. 3) Subscapular artery.
Which are the branches comes from Subscapular artery ?
It descent thru the axilla and bifurcate in to the circumflex scapular artery and the thoracodorsal artery.
What is the pathway follows the circumflex scapular artery?
It travels posteriorly and join to anastomotic networks surrounding the scapula
What is the pathway follows the thoracodorsal artery?
It continues inferiorly and supplies the Subscapularis, the serratus anterior, and some intercostal muscles.
Which arteries conform the anastomotic ring around the surgical neck of the humerus?
Anterior circumflex humeral artery and Posterior circumflex humeral artery.
Which muscles are supplied by the branches of the anastomotic ring around the surgical neck of the humerus?
Deltoid. Teres major and minor. Triceps brachial
Which are the branches from the subclavian artery?
1)Dorsal scapular artery.
2)Suprascapular artery.
They form an anastomotic around the scapula with the circumflex scapular artery.