Shoulder Girdle

Shoulder Girdle

Shoulder Complex is the most mobile joint in the body.ScapulaClavicleSternumHumerusRib cage/Thorax

Shoulder Girdle

Points of interestScapula

• 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 includesSternoclavicular jointAcromicoclaviulcar jointGlenohumeral jointScapulothoracic 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 scapulaProjection 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-topBody-MiddleXiphoid 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 Signs and Sx

deformity Pain in vicinity of

ACSpecial Test Shear Test Sulcus Sign

Treatment 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

Joint motions

Shoulder girdle Up rotation Down rotation Scapular tilt Down rotation Up rotation Protraction Retraction

Shoulder Flexion Extension Hyperextension Adduction Abduction Medial rotation Lateral rotation

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 pullUpper trapeziusMiddle trapeziusLower 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.