The shoulder complex Flashcards
2 bony articulations in pectoral girdle
acromioclavicular
sternoclavicular
2 false articulations in the shoulder complex
- scapulothoracic
- suprahumeral
what makes up the shoulder girdle
- scapula
- clavicle
- manubrium
why is the humeral head angled posteriorly relative to distal condyles
- greater ROM in abduction + ER before impingement
joint classification of the sternoclavicular joint
synovial
complex - saddle/sellar
The clavicle is ____ in the A-P direction
female
primary function of the AC joint
allow scapula to maintain thoracic contact through movement
what are the 6 main places stability for the GH joint come from
- bone (minimal)
- glenoid labrum
- anterior capsule
- ligaments
- m/ tend
- negative interarticular pressure
this part of the GH joint provides stability for end ROM
the anterior capsule
what does the coracohumeral ligament counteract
strengthens superior capsule - counteracts downward pull
scapulothorcaic movements aid in what 5 things?
- increasing arm ROM
- Stability in OH work
- helps delta with proper tension
- absorbs shock
- prevents impingement
what are the actions at the scapula
- elevation/depression
- retraction/ protraction
- upward/downward rotation
what can cause poor scapulohumeral rhythum
- frozen shoulder
2. torn rotator cuff
bursar in the shoulder combo in impingement
subacromial/subdeltoid bursa
when space is decreased due to Ca+, faulty rhythum or inclination of the GH joint What is likely to happen
impingement of the subacromial/subdeltoid bursa
