Specific Joints: UE Flashcards
What articulations make up the Shoulder Joint?
- GH joint
- Sternoclavicular
- AC joint
- Scapulothoracic joint
GH joint
EVERYTHING YOU KNOW!
- convex head of humerus + concave surface of glenoid fossa of scapula
- ball/socket synovial joint–3 DOF
- small articular surface + lg humeral head == unstable joint
GH joint osteokinematic motions
flex, ext, abd, add, rotation
GH joint Loose packed pos & Close packed pos
Loose packed= 55deg ABD, 30deg Horiz ADD (slings)
Close packed= ABD + Lat Rot (ER)
GH capsular pattern
ER>ABD>IR
Sternoclavicular joint
Everything you know!
- SCJ formed by medial end of clavicle + manubrium of sternum
- Saddle shaped synovial jt w/ 3 DOF
- Fibrocartilaginous disc bw manubrium and clavicle enhances stability of the joint— shock absorber + axis of rotation
Sternoclavicular joint Osteokinematic motions
- Elevation, Depression
- Protraction, Retraction
- Rotation
Sternoclavicular Joint
Loose vs Close pack pos’s
- Loose packed= arm resting @ side
- Close packed= max shoulder elevation
Sternoclavicular joint capsular pattern
Pain @ extremes of ROM
AC Joint
Everything you know!
- Acromion process of scap + lateral end of clavicle
- Plane synovial jt w/ 3 DOF
- Functions to maintain relationship bw scapula and clavicle**during GH ROM
AC joint Osteokinematic motions
- Ant tilting, Post tilting
- Upward rot, Downward rot
- Protraction, Retraction
AC jt Loose vs Close pack pos’s
- Loose packed= arm resting @ side
- Close packed= arm abducted to 90deg
AC jt Capsular pattern
Pain @ extremes of ranges of motion
Scapulothoracic articulation
Everything you know!
- Formed by body of scapula and mm’s covering POST chest wall
- Motion consists of sliding scapula ON thorax
- NOT a true anatomical jt bc lacks synovial jt characteristics
Shoulder
Acromioclavicular ligaments
surround AC jt on all sides
control horizontal mvnts of clavicle
