Anatomy of the Shoulder and Scapula

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  • Topic: Scapula, Clavicle, Coracoid process
  • Pages : 8 (2223 words )
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  • Published : May 10, 2013
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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. Superior border 4. Supraspinous fossa 5. Superior angle 6. Spine of the scapula 7. Medial/ Vertebral border 8. Infraspinous fossa 9. Inferior angle 10. Lateral/ Axillary border 11. Neck 12. Margin of glenoid cavity 13. Acromial angle 14. Acromion 15. Subscapular fossa 16. Supraglenoid tubercle 17. Glenoid cavity/ fossa 18. Infraglenoid tubercle| 1. Head 2. Anatomical neck 3. Lesser tuberosity 4. Intertubercular/ Bicipital Groove 5. Greater tuberosity 6. Surgical neck 7. Deltoid Tuberosity 8. Groove for radial nerve (posteriorly seen) 9. Medial lip of intertubercular groove (insertion of Teres Major) 10. Lateral lip of intertubercular groove (insertion of Pactoralis Major)| Attachments| 1. SCM 2. Pectoralis Major 3. Rectus Abdominis 4. Sternohyoid 5. Sternothyroid 6. Area covered by right pleura 7. Area covered by left pleura 8. Area in contact with pericardium 9. Transverse thoracis 10. Diaphragm| 1. Trapezius 2. Deltoid 3. SCM 4. Pectoralis Major 5. Sternohyoid 6. Costoclavicular Ligament 7. Subclavius muscle and clavipectoral fascia 8. Trapezoid Ligament 9. Conoid Ligament| 1. Trapezius 2. Inferior belly of Omohyoid 3. Supraspinatus 4. Levator Scapulae 5. Rhomboid Minor & Major 6. Latissimus dorsi 7. Teres Major & Minor 8. Intervening groove for circumflex scapular artery 9. Infraspinatus 10. Long head of triceps 11. Deltoid 12. Coraco-acromial Ligament 13. Trapezoid Ligament 14. Conoid Ligament 15. Superior transverse scapular Ligament 16. Coracohumeral Ligament 17. Pectoralis Minor & Major 18. Coracobrachialis & short head of Biceps brachii 19. Long head of Biceps Brachii 20. Subscapularis 21. Serratus Anterior 22. SCM| 1. Supraspinatus 2. Subscapularis 3. Latissimus Dorsi 4. Teres Major 5. Pectoralis Major 6. Brachialis 7. Coracobrachialis 8. Deltoid 9. Infraspinatus 10. Teres Minor 11....
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