THE SHOULDER JOINT Chapter 5. Bones Humerus Scapula Clavicle.

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Presentation transcript:

THE SHOULDER JOINT Chapter 5

Bones Humerus Scapula Clavicle

Humerus – Anterior View 1. Head 2. Lesser tubercle 9. Intertubercular Groove 10. Greater tubercle

1. Head 5. Deltoid tuberoscity Humerus – Posterior View

Deltoid Tuberoscity

Scapula – Posterior View  Acromion process  Spine  Superior angle  Inferior angle  Medial (Vertebral) border  Lateral (Auxiliary) border  Supraspinous fossa  Infraspinous fossa

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

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

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

Can You Name Them?

Joints There are two joints to the shoulder complexjoints The acromioclavicular (AC) joint where the clavicle meets the acromion. The glenohumeral joint or the shoulder joint.

Shoulder Joint Ball and socket joint –Movement in all three planes Glenoid fossa Glenoid labrum Head of humerus

Joint Capsule

Four ligaments are the main source of stability for the shoulder, and help to keep the shoulder from dislocating. 1.Superior glenohumeral ligament 2.Coracohumeral 3.Middle glenohumeral ligament 4.Inferior glenohumeral ligament

Other Ligaments The coracoacromial ligament connects the coracoid process and the acromion process Coracoacromial ligament

coracoacromial

Bursa A bursa is a saclike structure containing lubricating fluid and located between a tendon and a bone or between moving structures.

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

Actions: Sagittal plane

Actions: Frontal plane

Actions: Transverse plane

Abduction/AdductionFlexion/Extension

Internal Rotation/External Rotation

Horizontal Adduction

Horizontal Abduction

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