THE ACROMIOCLAVICULAR (AC) JOINT

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Presentation transcript:

THE ACROMIOCLAVICULAR (AC) JOINT THE SHOULDER GIRDLE THE ACROMIOCLAVICULAR (AC) JOINT

THE BONES

Clavicle

Humerus – Anterior View 1. Head 2. Lesser tubercle 5. Medial epicondyle 6. Trochlea 7. Capitulum 8. Lateral epicondyle 9. Intertubercular Groove

Humerus – Posterior View 1. Head 5. Deltoid tuberosity 6. Lateral epicondyle 7. Olecranon fossa 9. Medial epicondyle

Scapula

Scapula – Posterior View Acromion process Spine Superior angle Inferior angle Medial (Vertebral) border Lateral (Auxiliary) border Supraspinous fossa Infraspinous fossa 3. 1. 7. 2. 8. 5. 6. 4.

Scapula – Anterior View 1. Acromion process 2. Coracoid process 3. Glenoid fossa or cavity 4. Inferior angle 5. Superior angle 6. Medial (Vertebral) border 7. Lateral (Auxiliary) border 8. Supscapular fossa 1. 2. 5. 3. 8. 6. 7. 4.

Scapula – Proximal (Top) View 1. Acromion process 2. Coracoid process 3. Glenoid fossa or cavity 4. Spine 5. Supraspinous fossa 1. 4. 3. 5. 2.

Scapula – Lateral View 1. Acromion process 2. Coracoid process 3. Glenoid fossa or cavity 4. Superior angle 5. Inferior angle 4. 1. 2. 3. 5.

Can You Name Them?

II. JOINTS AND THEIR ACTIONS

Sternoclavicular joint Depression Stabilization

Acromioclavicular (AC) joint 1. Elevation 2. Depression 3. Adduction (Retraction) 4. Abduction (Protraction) 5. Upward rotation 6. Downward rotation

Depression/Elevation Protraction/Retraction

Adduction Abduction Left Scapula Right Scapula

Upward Rotation Upward Rotation Downward Rotation Downward Rotation Left Scapula Right Scapula Upward Rotation Upward Rotation Downward Rotation Downward Rotation

AC Actions and Muscles ACTION Elevation Depression Adduction Abduction Upward rotation Downward rotation MUSLCE LOCATION Superior Inferior Medial Lateral Depends on the line of pull

THE GLENOHUMERAL JOINT THE SHOULDER JOINT THE GLENOHUMERAL JOINT

Shoulder (Glenohumeral) joint 1. Abduction 2. Adduction 3. Flexion 4. Extension 5. Horizontal adduction 6. Horizontal abduction 7. External (lateral) rotation 8. Internal (medial) rotation

Abduction/Adduction Flexion/Extension

Internal Rotation/External Rotation

Horizontal Adduction

Horizontal Abduction

GH Actions and Muscles ACTION Flexion Extension Adduction Abduction Horizontal Adduction Horizontal Abduction Internal Rotation External Rotation MUSLCE LOCATION Anterior Posterior Inferior Superior Medial Lateral