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The Shoulder Complex Applied Kinesiology 420:151.

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Presentation on theme: "The Shoulder Complex Applied Kinesiology 420:151."— Presentation transcript:

1 The Shoulder Complex Applied Kinesiology 420:151

2 Agenda Introduction to the shoulder complex Articulations of the shoulder complex Scapulohumeral rhythm

3 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

4 Anterior/posterior connections? Same/different than hip girdle? Figure 5.7

5 Agenda Introduction to the shoulder complex Articulations of the shoulder complex Scapulohumeral rhythm

6 Articulations of the Shoulder Complex Shoulder girdle: Acromioclavicular joint Sternoclavicular joint Shoulder joint

7 Acromioclavicular (AC) Joint Joint classification: Diarthrodial nonaxial Joint structure: Ligamentous reinforcement Fibrocartilage disk Joint function: Rotation about 3 cardinal planes

8 Gliding in which plane? Rotation in which plane?

9 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?

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11 SC Joint AC elevation SC elevation AC depression SC depression AC protraction SC protraction + anterior rotation AC retraction SC retraction + posterior rotation

12 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

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14 Agenda Introduction to the shoulder complex Articulations of the shoulder complex Scapulohumeral rhythm

15 Scapulohumeral Rhythm As the shoulder joint moves, the shoulder girdle also moves greater ROM

16 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


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