Shoulder Girdle

Shoulder Girdle Shoulder Complex is the most mobile joint in the body. Scapula Clavicle Sternum Humerus Rib cage/Thorax

Shoulder Girdle Points of interest Scapula Acromion process Glenoid fossa

Shoulder Girdle Lets take a look at the parts Then lets build with clay and figure out the joints locations on your own. I will come around in 10 minutes and ask random people to show me the joint they made and tell me where the joint is.

Shoulder Girdle It also includes Sternoclavicular joint Acromicoclaviulcar joint Glenohumeral joint Scapulothoracic articulation

Shoulder Girdle Ligaments Sternoclaviular Joint-Joint connecting the sternum to the clavicle on each side of the body.

Shoulder Girdle Ligaments Acromioclavicular Joint- joint connecting the acromion process to the clavicle at the distal end of the clavicle.

Shoulder Girdle Joints Glenohumeral joint- joint where the humerus fits into the glenoid fossa of the scapula.

Shoulder Girdle Ligaments Scapulothoracic joint- joint where the scapula slides over the thorax or rib cage.

Shoulder Girdle Motions Shoulder girdle is the motions at the Acromioclavicular joint Sternoclavicular joint Elevation/depression Protraction/retraction Upward/downward rotation

Scapula Landmarks Go to the skeleton, there are numbers on each one, using your book write the number and the landmark’s name. You are going to do this in lab groups so get your lab binder for this activity.

Scapula Landmarks Axillary border- lateral side between glenoid fossa and inferior angle.

Scapula Landmarks Vertebral border- between superior and inferior angles medially. Where the rhomboid and serratus anterior muscles attach.

Scapula Landmarks Spine of the scapula Projection on posterior surface running from medial border to the acromion process.

Scapula Landmarks Glenoid fossa- slightly concave surface that articulates with humerus.

Scapula Landmarks Acromion process-broad flat area on superior lateral aspect.

Scapula Landmarks Coracoid process-Projection on anterior surface of scapula. (e)

Scapula landmarks Inferior and Superior Angle- superior medial and inferior point of the scapula.

Shoulder Girdle Bones Clavicle-S shaped bone that connects upper extremity to the axial skeleton.

Shoulder Girdle Bones Sternum-flat bone located in the midline of the anterior thorax. Manubrium-top Body-Middle Xiphoid process bottom triangle

Shoulder Ligaments Acromioclavicular ligament- connect accromion to clavicle and help prevent dislocation of the clavicle.

Shoulder Ligament Coracoacromial Ligament- Connects the coracoid process to the acromion process.

Acromicavicular Separation Also known as an AC sprain. Occurs due to fall on outstretched arm or tip of shoulder. May be due to blow to tip of shoulder

AC separation Treatment Signs and Sx Three grades –the grade determines treatment Grade one is exercise and ice Grade two immobilize 3 weeks and then exercise Grade three immobilize 5 weeks and then exercise Signs and Sx deformity Pain in vicinity of AC Special Test Shear Test Sulcus Sign

Joint motions Shoulder Shoulder girdle Flexion Extension Hyperextension Adduction Abduction Medial rotation Lateral rotation Shoulder girdle Up rotation Down rotation Scapular tilt Protraction Retraction

Scapulohumeral rhythm The first 30 degrees of motion is shoulder. After that the for every 2 degrees the humerus moves the scapula upwardly rotates 1 degree.

Lets try it Stand next to a partner that you are comfortable touching on their back. Person in anatomical position, place your hand on the axillary border of the scapula. Ask them to abduction and see what happens when they get above 30 degrees. The scapula will start rotating upward

Muscles of shoulder girdle Trapezius- 3 lines of pull Upper trapezius Middle trapezius Lower trapezius

Muscles of shoulder girdle Levator scapula- named for the elevation of the scapula, its main function.

Muscles of shoulder girdle Rhomboid- major and minor. They get their name from Rhomboid shape, they lie under the trapezius.

Muscles of shoulder girdle Serratus Anterior- serrated shape can be touched in full flexion. It is a scapular protractor.

Muscles of shoulder girdle Pectoralis minor- only shoulder girdle muscle on the anterior side, it lies deep to the pectoralis major.