Joints: Shoulder and Hip

Where does the hip joint derive its's support?

From a strong articular capsule, large and powerful muscle groups that surround it, and many reinforcing ligaments.

What two bones articulate to form the glenohumeral joint (shoulder joint)?

Head of humerus and glenoid cavity of scapula

What are the uniaxial joint? (s)

Hinge Joint, Pivot Joint

What type of joint is the shoulder joint?

ball-and-socket joint

What 4 ligaments Support the hip?

iliofemoral ligament (y shaped, reinforces anterior aspect of hip joint) ischiofemoral ligament (spiral shaped, reinforces posterior aspect of hip joint) pubofemoral ligament (triangular thickening, supports inferior aspect) ligament of the head of the femur (small ligament, links head of femur with acetabulum)

What ligaments provide limited support and stability for the shoulder joint?

1. Coracohumeral ligament (between humeral head and coracoid process) 2. Glenohumeral ligaments

What 4 muscles make up the rotator cuff?

1. supraspinatus 2. infraspinatus 3. teres minor 4. subscapularis

What fibrocatilaginous ring strengthens the fit between the acetabulum and the head of the femur in the hip joint?

Acetabular Labrum

What is a bursae

Minimize frictional stress on a joint by cushioning its moving structures.

What are the non-axial joint? (s)

Plane Joint

What keeps the humeral head firmly inside the glenoid cavity (other than the glenoid labrum)?

The tendon of the long head of the biceps brachii muscle found in the anterior arm.

What is another name for the shoulder joint?

glenohumeral joint

What are the multi axial joint? (s)

Ball-and-socket

What articulation forms the hip joint?

Between the acetabulum and the head of the femur.

What are the biaxial joint? (s)

Condylar Joint, Saddle Joint

Is the range of motion for the hip greater when it is flexed or extended?

Flexed

What ligamentous structures surround the kneck of the femur and reinforce the articular capsule?

Retinacular Fibers

What is the most freely moving joint in the human body?

Shoulder joint (glenohumeral)

What cuff surrounds the shoulder joint?

The Rotator Cuff

What surrounding structure helps the humerus fit snuggly into the glenoid cavity of the scapula?

The glenoid labrum which is a fibrocartilaginous ring that sits on the rim of the glenoid cavity.