The Shoulder Complex Applied Kinesiology 420:151
Mar 31, 2015
The Shoulder Complex
Applied Kinesiology420:151
Agenda
Introduction to the shoulder complex
Articulations of the shoulder complex
Scapulohumeral rhythm
Introduction to the Shoulder Complex
Shoulder girdle + shoulder joint = shoulder complex
Shoulder girdle: Scapula, clavicle and articulations
Shoulder joint: Humeral head and glenoid fossa of
scapula
Anterior/posterior connections?
Same/different than hip girdle?
Figure 5.7
Agenda
Introduction to the shoulder complex
Articulations of the shoulder complex
Scapulohumeral rhythm
Articulations of the Shoulder Complex
Shoulder girdle: Acromioclavicular joint Sternoclavicular joint
Shoulder joint
Acromioclavicular (AC) Joint
Joint classification: Diarthrodial nonaxial
Joint structure: Ligamentous reinforcement Fibrocartilage disk
Joint function: Rotation about 3 cardinal planes
Gliding in which plane?
Rotation in which plane?
Rotation in which plane?
Rotation in which plane?
Sternoclavicular (SC) Joint Joint classification: Diarthrodial nonaxial Joint structure:
Ligamentous reinforcement Fibrocartilage disk Subclavius
Joint function: SC joint moves in response to AC joint
movement Movements?
SC Joint
AC elevation SC elevation AC depression SC depression AC protraction SC protraction +
anterior rotation AC retraction SC retraction +
posterior rotation
Shoulder Joint Joint classification: Diarthrodial
multiaxial ball and socket Joint structure:
Lax joint capsule Limited ligamentous support Shallow glenoid fossa Minimal muscular reinforcement
Rotator cuff Bursae
Joint function: Great mobility Poor stability
Agenda
Introduction to the shoulder complex
Articulations of the shoulder complex
Scapulohumeral rhythm
Scapulohumeral Rhythm As the shoulder joint moves, the
shoulder girdle also moves greater ROM
Scapulohumeral Rhythm Abduction/Flexion of shoulder joint
AC = Up Rot., SC = Post Rot., elevation Adduction/Extension of shoulder joint
AC = Down Rot., SC = Ant Rot, depression Hyperextension of shoulder joint
AC = Up tilt, elevation, SC = Ant Rot, elevation External rotation of humeral joint
AC = Retraction, SC = Minimal retraction Internal rotation of humeral joint
AC = Protraction, SC = Minimal protraction Horizontal adduction of humeral joint
AC = Protraction, SC = Protraction Horizontal abduction of humeral joint
AC = Retraction, SC = Retraction