Shoulder complex Flashcards
Shoulder Complex Created by:
Scapulothoracic (ST) articulation
Glenohumeral (GH) joint
Acromioclavicular (AC) joint
Sternoclavicular (SC) joint
Scapulothoracic
Articulation structure and function:
No structural/functional classification
Scapulothoracic
Articulation: Bone-on-bone contact impeded by
__________ and ________
serratus anterior and subscapularis
Glenohumeral (GH) Joint Structural classification:
synovial
Glenohumeral (GH) Joint Functional classification:
diarthrotic ball-and-socket
Glenohumeral (GH) Joint Articulation:
between head of humerus
and glenoid fossa of scapula
Head of humerus
rounded, convex
Glenoid fossa
shallow, concave
Loose, baggy
GH Joint Capsule
Does not provide much joint
stability
GH Joint Capsule
Fibrocartilaginous ring around the
perimeter of the glenoid fossa
Glenoid Labrum
Functions to increase bone-onbone contact
Glenoid Labrum
Travels across bicipital groove
Creates a tunnel for the tendon of
biceps – long head
Transverse Ligament
Thickening of the anterior joint
capsule
Provides anterior support
Glenohumeral Ligament
Located between humeral head and
acromion process
Sub-acromial/Sub-deltoid bursa
(AC)
Joint Structure
synovial
Functional classification: AC joint
diarthrotic – gliding
Thickening of the superior aspect
of the joint capsule
Acromioclavicular
Ligament
Attaches from coracoid process to
clavicle
Coracoclavicular
Ligament
Sternoclavicular (SC)
Joint
Structural classification:
Functional classification:
Sternoclavicular (SC)
Joint
Structural classification: synovial
Functional classification:
diarthrotic; saddle
Articulation between the clavicle,
manubrium of sternum and costal
cartilage of R1
Sternoclavicular (SC)
Joint
Joint with:
Intra-articular disc
Costoclavicular ligament
SC Joint
Fibrocartilaginous disc within the joint
Creates the articulating surface shape responsible for the saddle joint
Intra-articular Disc
Attaches from R1 to clavicle
Creates a fulcrum for movement at
the SC joint
Costoclavicular Ligament
