The Anatomy of the Shoulder and Scapula

SHOULDER REGION/ COMPLEX * * Made up of 3 joints * Most mobile of all joints because of its 6 mobile areas * Decrease stability because the only UE attachment to the trunk is at the Sternoclavicular (SC) Joint. * and common site of dislocation is between the shallow glenoid cavity and humeral head which hangs loosely to the inclined plane of the glenoid fossa. * The support and stabilization depends: MUSCLES and LIGAMENTS * Functions: provides wide range for hand placement
Stabilization for hand use
Lifting and pushing
Eleation of the body
Forced inspiration and expiration
WB in crutch-walking/ handtands

* Composed of 20 muscles, 3 bony articulations & 3 ST moving surfaces (functional joints that permit GREATEST MOBILITY of any joint area found in the body (approx. 180 FL/ABD/ROT & 60 HyperEx) * Extensive mobility is provided by 6 moving areas: 1. Bony Articulations a. Sternoclavicular b. Acromioclavicular c. Glenohumeral 2. Functional Joints d. Scapulothoracic e. Suprahumeral/ Subacromial f. Bicipital Groove

ANATOMY OF THE SHOULDER AND SCAPULA

BONES

Bone | STERNUM | CLAVICLE | SCAPULA | HUMERUS (Proximal-to-mid-humerus) | Bony Landmarks | 1. Jugular Notch 2. Clavicular Notch 3. Notch for 1st costal cartilage 4. Manubrium 5. Sternal angle and manubriosternal joint 6. Body 7. Notch for 2nd costal cartilage 8. Notch for 3rd costal cartilage 9. Notch for 4th costal cartilage 10. Notch for 5th costal cartilage 11. Notch for 6th costal cartilage 12. Notch for 7th costal cartilage 13. Xiphisternal joint 14. Xiphoid process | 1. Acromial end of clavicle (Lateral) 2. Sternal end of clavicle (Medial) 3. Shaft of clavicle 4. Impression for costoclavicular ligament 5. Groove for subclavius muscle 6. Conoid tubercle 7. Costal Tuberosity 8. Trapezoid line | 1. Coracoid process 2. Suprascaular Notch 3.