Specific Joints: UE Flashcards
(21 cards)
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
Shoulder
Coracoacromial ligaments
bw coracoid process and acromion–forms “roof” over humeral head
LIMITS superior translation of humeral head
*prevents separation of the AC jt
Shoulder
Coracoclavicular ligaments
Bw coracoid process and clavicle
2 diff ligs: Conoid and Trapezoid
-limits superior translation of the clavicle
*PRIMARY support of the AC jt
CoracoHumeral ligs
Proximal coracoid and splits distally to Greater/Lesser tuberosities
-LIMITS inf translation of humeral head
*Unites Supra/Subscap tendons (found bw them)
Costoclavicular ligs
Medial clavicle + first rib
Primary support for SC jt
Glenohumeral ligaments
Name all 3
- Superior
- Middle
- Inferior
SUPERIOR Glenohumeral ligament
LIMITS: ADD of shoulder + ER w/ shoulder @ 0-45deg ABD
