UE Flashcards
What are three areas of transition in the arm?
Axilla, cubital fossa, carpal tunnel
What is the superior thoracic aperture (thoracic inlet)?
Lateral 1st rib, posterior clavicle, superior scap, medial coracoid process
What muscles make up the posterior thoracic wall?
Traps, Lats, rhomboids, levator, SA
If there are close fractures to these 3 major nerves it can cause nerve damage
Axillary, ulnar, radial
What 3 bones make up the pectoral girdle? What 3 joints?
Clavicle, scap, proximal humerus; GH, SC, AC
What type of joint is SC
Ball and socket
What provides shoulder stability?
Glenoid labrum, supraspinatus, RC tendons, LH of biceps and coracromial arch
2 main RC disorders
Impingement and tendinopathy
Which RC most commonly affected? Why?
Supra; passes beneath acromion and AC ligament
What structures create the walls of the axilla?
-medial: SA
-lateral: humerus
-anterior: pecs and subclavius
-posterior: subscap, Lats, posterior scap muscles
Describe the posterior wall of axilla
Two finger trick
-quadrangular space: axillary n, posterior circumflex humeral artery
-triangular space: circumflex scapular artery
-triangular interval: radial n, profunda brachial a.
If there is a fracture in the midshaft of the humerus, what symptoms might a pt have?
Wrist drop and sensory changes over dorsum of hand; radial nerve damage
What muscles are in the anterior compartment?
Coracobrachialis, Brachialis, biceps brachii
What muscles are in the posterior compartment?
Triceps (3 heads)
What is the major artery in the arm? What is it a continuation of? What does it divide into and where?
Brachial; axillary; radial and ulnar at elbow