[NOT DONE] Shoulder (Exam 2)

What four articulations make up the shoulder complex?

Sternoclavicular Joint, Acromioclavicular Joint, Scapulothoracic Joint, and Glenohumeral Joint

Which shoulder joint has joint surfaces that are consist of two different lines of convexity and concavity (both joint surfaces have portions that are concave and others that are convex)?

Sternoclavicular Joint

What makes the SC joint so stable?

Anterior and Posterior Sternoclavicular Ligament (along with an articular disc)

How many degrees of freedom are present in ALL of the joints of the shoulder complex?

Three Degrees of Freedom

What are the types of movement that occur at the SC Joint?

Elevation/Depression, Protraction/Retraction, Axial Rotation (basically all shoulder movements)

What plane does SC joint elevation/depression occur on?

Frontal

What plane does SC joint Protraction/Retraction occur on?

Horizontal

What arthrokinematic type occurs with longitudinal rotation of the SC joint?

Spin

What movements of the scapula cause longitudinal rotation of the SC joint?

Flexion or Abduction

Does the AC Joint have an articular disc?

Yes

What is the most lateral of the AC Joint ligaments?

Coracohumeral Ligament

What ligament directly attaches the clavicle and acromion?

Acromioclavicular Ligament

What two ligaments make up the Coracoclavicular Ligament?

Conoid and Trapezoid Ligaments

What ligament attaches the coracoid process to the acromion?

Coracoacromial Ligament

What movements are attributed to the AC joint?

Upward/Downward Rotation, Horizontal Rotation, Sagittal Rotation

Which of the four joints of the shoulder complex is NOT a “true” joint?

Scapulothoracic Joint

What points of contact are present in the Scapulothoracic Joint?

Anterior Surface of Scapula to Posterior-lateral Wall of Thorax

What two joints’ movements are responsible for the kinematics present at the ST Joint?

Scapulothoracic and Acromioclavicular Joints

Which is larger: the humeral head or the glenoid fossa?

Humeral Head

What makes up the fibrous capsule that stabilizes the GH Joint?

Rotator Cuff Muscles and Capsular Ligaments

What creates the hammock-like structure underneath the GH joint?

The Anterior/Posterior Capsular Ligament and Axillary Pouch