Axilla and Arm Flashcards
Which arteries anastomose in the upper arm?
-Anterior circumflex humeral artery and Posterior circumflex humeral artery
Which arteries anastomose in the posterior shoulder?
- Dorsal scapular
- Suprascapular
- Circumflex scapular
- Thoracodorsal
What two branches come off the Thyrocervical trunk?
Thyrocervical trunk comes off the subclavian artery and produces:
- Transverse cervical artery
- Superficial branch
- Dorsal scapular artery
- Suprascapular
What artery supplies the posterior shoulder from the axillary artery?
Subscapular artery
- Circumflex scapular
- Thoracodorsal artery
What forms the anterior axillary fold?
pectoralis major
What forms the posterior axillary fold?
latissimus dorsi and teres major
What is inside the axillary sheath?
THICK fascia containing:
- Axillary artery
- Axillary vein
- Distal portion of Brachial plexus
Where does the subclavian artery become the axillary artery?
lateral border of 1st rib
Where does the axillary artery become the brachial artery?
inferior border of Teres major
What divides the three portions of the axillary artery?
First part - proximal to pectoralis minor Second part - deep to pec minor Third part - distal to pec minor
What comes off the first portion of the axillary artery?
Superior thoracic artery
What does the superior thoracic artery supply?
1st and 2nd intercostal spaces
What are the two branches off of the second part of the axillary artery?
- Thoracoacromial artery
- Lateral thoracic artery
What does the thoracoacromial artery supply?
- Pectoral muscles
- Deltoid
What does the Lateral thoracic artery supply?
- Serratus anterior
- pectoral muscles
*courses with the long thoracic nerve*
What are the 3 branches of the third part of the axillary artery?
- Subscapular artery 2. Anterior circumflex humeral artery 3. Posterior circumflex humeral artery
What are the branches of the subscapular artery?
- Circumflex scapular artery 2. Thoracodorsal artery
What does the circumflex scapular artery supply?
scapular region
What does the thoracodorsal artery supply?
Latissimus dorsi
What do the anterior and posterior circumflex humeral arteries supply?
shoulder and arm
What does the posterior circumflex humeral artery travel through the quadrangular space with?
Axillary nerve and posterior circumflex humeral vein
What are the borders of the quadrangular space?
-Teres minor (superior) -Teres major (inferior) -Long head of triceps -Humerus
The union of brachial veins and basilic vein form what?
Axillary vein
Where do the brachial veins join the basilic vein?
inferior border of teres major
Where are the roots of the brachial plexus?
neck
Where are the trunks of the brachial plexus?
neck
Where are the divisions of the brachial plexus?
deep to clavicle