Intro to upper limb and superficial back Flashcards
Describe the two clavicular joints
Sternoclavicular joint
- anterior/posterior sternoclavicular ligaments
- Articular disc with 2 synovial cavities
- Connects upper joint to axial skeleton
Acromioclavicular joint
-Synovial, acromion of scapula and distal (lateral?) end of clavicle
H-as superior and inferior acromioclavicular ligaments
Coracoacromial ligament
What are the epaxial (intrinsic) muscles of the back?
erector spinae muscles
transversospinales muscles
What are the hypaxial, extrinsic muscle of the back?
Layer 1 -trapezius -latissimus dorsi Layer 2 -levator scapulae -rhomboid major/minor -teres major/minor -infraspinatus, suprasinatus -subscapularis
What muscles make up the rotator cuff?
supraspinatus
infraspinatus
teres minor
subscapularis
What actions can the scapula do?
protraction/retraction
upward/downward rotation
elevate and depress
What is the blood supply to the superficial back and shoulder region?
off thyrocervical trunk:
- suprascapular a.
- dorsal scapular a.
off off axillary a
-subscapular a. and gives rise to
thoracodorsal a
circumflex scapular a.
What occurs if the axillary artery is ligated proximal to the subscapular a?
bloodflow of the subscapular a reverse
goes from thyrocervical trunk → suprascapular and dorsal scapular (dorsal scapular receives from posterior intercostal) → circumflex scapular and thoracodorsal → subscapular → axillary
(normally the subscapular flows into the thoracodorsal and subscapular)
allows lower limb to receive blood, not a very good anastomosis tho
What are the borders of the quadrangular space?
superior-lateral border of scapula
inferior-teres major
medial-long head of triceps brachii
lateral-surgical head of humerus
What is contained in the quadrangular space?
axillary n.
posterior circumflex humeral a.
What is the triangle of auscultation?
on opening between trapezius, latissimus dorsi and the medial scapular border where you can hear lung sounds better cause theres less in the way
What arteries are involved in the scapular anastomosis?
suprascapular dorsal scapular posterior intercostal circumflex scapular thoracodorsal
goes out through subscapular
what is contained in the triangular space?
circumflex scapular a.
triangular interval contents? (hiatus
radial n.
deep brachial a.
what is contained in the triangular space?
circumflex scapular a.
triangular interval contents? (hiatus
radial n.
deep brachial a.
