shoulder conditions chapter 11. articulations sternoclavicular (sc) acromioclavicular (ac)...
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Articulations
Sternoclavicular (SC)
Acromioclavicular (AC)
Coracoclavicular (CC)
Glenohumeral (GH)
Scapulothoracic
Sternoclavicular Joint
Surrounded anteriorly and posteriorly by 4 ligaments InterclavicularCostoclavicularAnterior sternoclavicularPosterior sternoclavicular
SC enables rotation of the clavicle with respect to the sternum
Acromioclavicular Joint
Acromion process of the scapula with the distal clavicle is the jointSuperior and Inferior acromioclavicular
ligamentsCoracoacromial ligament
AC enables limited motion in all three planes of movement
Coracoclavicular Joint
Coracoid process of the scapula and the inferior surface of the clavicle.Coracoclavicular ligament
Resists upward movement of the clavicle, downward movement of the scapula, and anteroposterior movement of the clavicle or scapula.
Glenohumeral Joint
Articulation between the glenoid fossa of the scapula and the head of the humerusSuperior, middle, and inferior glenohumeral
ligaments
Allows just about all ranges of motion in all three planes
Scapulothoracic Joint
Muscles attaching to the scapula from the thoracic trunk area allow the scapula to move
Stabilizes the shoulder-
Permits many movements of the shoulder
Movements
Flexion
Extension
Hyperextension
Abduction
Adduction
Horizontal Adduction
Horizontal Abduction
Medial rotation (internal)
Lateral rotation (external)
Clavicular Fractures
Blow or fall on the point of the shoulder
Figure 8 brace is worn for 4 to 6 weeks
Pain will be persistent on palpation and active movements
Scapular Fractures
Spine of scapula, acromion process, coracoid process, or the glenohumeral joint
Either direct trauma or a forceful contraction of the attaching muscle
Epiphyseal and Avulsion Fractures
Growth plates do not close until 18 to 25 years of age
Excessive movements of these plates can cause fractures
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