What is the glenoid fossa and what is its purpose?
The glenoid fossa is the socket of the shoulder joint. This part of the shoulder is a ball and socket joint. The head of the Humerus fits into the Glenoid fossa, though it is a shallow socket.
What is a disadvantage of the shallow glenoid fossa?
Compared to the acetabulum (at the hip-joint) the glenoid cavity is relatively shallow. This makes the shoulder joint prone to dislocation (luxation).
What is the importance of the glenoid labrum?
The glenoid labrum is similar to the meniscus of the knee. It is a fibro-cartilaginous rubbery structure which encircles the glenoid cavity deepening the socket providing static stability to the glenohumeral joint. It acts and looks almost like a washer, sealing the two sides of the joint together.
What covers the glenoid fossa?
However, in bony terms the ‘socket’ (the glenoid fossa of the scapula) is quite shallow and small, covering at most only a third of the ‘ball’ (the head of the humerus). The socket is deepened by the glenoid labrum, stabilizing the shoulder joint….Glenoid labrum.
| Glenoidal labrum | |
|---|---|
| TA2 | 1765 |
| FMA | 23290 |
| Anatomical terminology | |
Can a glenoid fracture heal without surgery?
Trauma may cause a fracture of the humerus (ball) or the glenoid (socket) of the shoulder joint. The majority of these injuries can be treated without surgery with a good, long-term result. Some fractures are better treated with surgery because they may carry a high risk of arthritis if left alone.
How is a glenoid fracture treated?
Our preferred techniques for glenoid rim fractures, involving less than 20% of the joint surface, are arthroscopic-assisted re-fixation techniques using suture anchor repair and screws. Large antero-inferior glenoid fragments are stabilised using combined arthroscopic and open techniques.
What is the most mobile joint in the body?
[3][1][4] The glenohumeral joint ranks as the most mobile joint of the human body.
What joints are the least stable?
Shoulders: Our most mobile and least stable joints
- Osteoarthritis. This is the most common type of arthritis and occurs when the cartilage protecting a joint wears down and is lost.
- Rotator cuff disease. The rotator cuff is a group of four muscles and tendons that connect the arm to the shoulder.
- Bursitis.
- Frozen shoulder.
What is the least mobile joint in the body?
Fibrous joints
Which joints do not allow movement?
Immovable (Fibrous) Joints Immovable or fibrous joints are those that do not allow movement (or allow for only very slight movement) at joint locations. Bones at these joints have no joint cavity and are held together structurally by thick fibrous connective tissue, usually collagen.
Why the shoulder joint is both more mobile and weaker than the hip joint?
However, the shoulder is much more easily dislocated than the hip. The shoulder has quite a shallow socket. This makes it even more mobile. It depends upon muscles, tendons and ligaments to keep it in place.
Do hips have rotator cuffs?
The hip has three muscles known as the abductors, or gluteus muscles, that have been referred to as “the rotator cuff of the hip”. Tears of these muscles, most commonly the gluteus medius, occur in older individuals and are much less common than rotator cuff tears in the shoulder.
What is the least stable joint in the shoulder?
The shoulder is our most mobile, yet least stable joint….The shoulder is composed of four joints:
- The glenohumeral joint is the main joint of the shoulder.
- The sternoclavicular joint is the joint between the sternum (chest bone) and collar bones.
What is the most important joint in the human body?
Hip Joint
Which part of the skeleton moves so we can breathe?
The Thoracic Cage With exceptions, ribs are connected in the front to the vertical sternum and in the back to the spinal vertebrae. When the body inhales, the ribs move upward and outward, expanding the space within them where the lungs are, which allows the lungs to expand with air.
How do joints help your body?
Joints are where two bones meet. They make the skeleton flexible — without them, movement would be impossible. Joints allow our bodies to move in many ways.