Posterior Shoulder Flashcards
Parts of the clavicle from posterior view
- Acromial end
- Groove for costcoclavicular ligament
- Deltoid tubercle
- Sternal Facet
Distal and medial border of scapula
Medial = medial border
Distal = axillary border
The ___ angle is on the superior border
Superior
Posterior parts of scapula
- Supraspinous fossa
- Spine
- scapular notch
- scapular foramen
- Coracoid process
- Acromion process
- Glenoid fossa
- infraglenoid tubercle
- infraspinous fossa
___ tubercle of the humerus is a lateral rotator
Greater
___ tubercle medially rotates the humerus
Lesser
Deltoid origin, insertion, and action
Origin - clavicle, acromion, spine of scapula
Insertion - deltoid tuberosity
Action - Flexion/medially rotate, abduct humerus, extend/laterally rotate
Supraspinatus origin, insertion, and action
Origin - supraspinous fossa
Insertion - greater tubercle
Action - adducts humerus and stabilizes shoulder
Infraspinatus origin, insertion, and action
Origin - Infraspinous fossa
Insertion - greater tubercle
Action - laterally rotate humerus, stabilize shoulder
Teres minor origin, insertion, and action
Origin - dorsal axillary border scapula
Insertion - greater tubercle
Action - laterally rotate humerus, stabilize shoulder
Teres major origin, insertion, and action
Origin - dorsal inferior angle of scapula
Insertion - medial lip of intertubercular sulcus of humerus
Action - medially rotate humerus, adduct/extend humerus
Triceps brachii origin, insertion, and action
Origin - infraglenoid tubercle
Insertion - olecranon process of ulna
Action - extends/adducts humerus, and extend forearm at elbow
Subscapularis origin, insertion, and action
Origin - ventral surface of scapula
Insertion - lesser tubercle of humerus
Action - Medially rotate humerus, adduct humerus, stabilize shoulder joint
4 muscles of the rotator cuff
Supraspinatus
Infraspinatus
Teres Minor
Subscapularis
SITS
Function of rotator cuff
allows for throwing motion
Quadrangular space muscles
Teres minor
Teres major
Triceps
Humerus
Triangular interval muscles
Triceps
Teres major
Humerus
Triangular space muscles
Teres major
Teres minor
Triceps
Nerve and artery in quadrangular space
Axillary nerve
Posterior humeral circumflex artery
Nerve and artery in triangular interval
Radial nerve
Profunda brachii artery
nerve and artery in triangular space
Circumflex scapular artery
What joint has the greatest range of motion in the body?
Glenohumeral joint
___ in the shoulder minimize friction
Bursae
Joint capsules in the glenohumeral joint
Fibrous and synovial capsule
___ lip is around the glenoid cavity
Cartilaginous
Describe the fibrous capsule of the glenohumeral joint
- Extends from margin of glenoid cavity to neck of humerus
- Thicker on anterior aspect
- Strengthened by ligaments
Describe the synovial capsule of the glenohumeral joint
Lines interior of the fibrous capsule
What are the types of bursa in the glenohumeral joint and describe them
Subacromial bursa
- tendon of supraspinatus from acromion
Subscapular bursa
- tendon of subscapularis from humerus/scapula
What’s bursitis?
Inflammation of the bursa
- calcium deposits on bursa
Describe torn labrum
Partial tear or complete tear of the cartilaginous ring surrounding the glenoid fossa
SLAP tear
superior labrum anterior and posterior
