How does the clavicle sit at the SC and AC joint?
AC joint: slightly elevated
What are the downward rotators of the scapulothoracic muscles
Rhomboids, Levator scapulae Deltoid
What goes through the quadrangular space?
Axillary nerve and posterior circumflex artery
how many divisions are there of the glenohumeral ligament?
3: Inferior, superior, middle
Borders of the Quadrangular Space?
medial: long head of triceps
Lateral: humeral shaft
superior: teres minor
Inferior: teres major
What is the scapular notch?
notch in the superior border of the scapula, just medial to the base of the coracoid process
What are the IR muscles at the scapulothoracic musces?
Deltoid, GH lateral rotators, Teres Major
What are the motor and sensory components of the Suprascapular nerve?
motor: innervate infraspinatus and supraspinatus
Sensory: go to the AC and GH joint
What is letter A and what is its function?
Coracoacromial ligament
prevents superior displacement of humerus
What makes up the Coracoacromial Arch
coracoid process
Acromion
Coracoacromial ligament
Inferior surface of the AC joint
What is number 12 and what attaches?
Infraspinatus fossa = infraspinatus muscle
Where does the Teres Minor insert and attach?
I: Upper 2/3 of scapula
A: Greater tubercle
What is the blood supply and innervation of serratus anterior?
Innervation: long thoracic nerve
Blood supply: circumflex scapular artery
What ligament links the proximal end of the clavicle to the first rib and its related costal cartilage?
Costoclavicular ligament
what goes in the scapular notch?
suprascapular nerve goes under and the artery goes over.
superior transverse scapular ligament
What is number 4?
Superior angle
What is the origin and insertion for Rhomboids Major?
O: Spinous Process T2-T5
I: Medial border scapula between spine and inferior angle
What does the axillary nerve innervate?
Deltoid, Teres Minor, subscapularis,
What is letter B and what is there function?
Coracohumeral ligament
strengthens the upper part of the joint capsule of the shoulder joint.
What is the border the triangular space and what does it contain?
inferior: teres major
lateral: long head of triceps
superior: lower border of teres minor
contains: scapular circumflex artery
What is Letter B, and what is its function?
Anatomical neck
upper half it is represented by a narrow groove separating the head of the humerus from the two tubercles
O: Apex of coracoid process
I: linear roughening of midshaft of humerus on medial side
What are the main blood supplies to the GH joint
Anterior and posterior circumflex humeral, circumflex scapular and suprascapular arteries
What ligament is not directly related to the AC joint?
Coracoclavicular ligament
What are the borders of the triangular interval and what does it contain?
superior: teres major
lateral: lateral head of the triceps or the humerus
medial: long head of the triceps
Contains: profunda brachii artery & radial nerve