What is the role of the glenoid labrum in shoulder stability?

What is the role of the glenoid labrum in shoulder stability?

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.

How important is the labrum?

The labrum is important to overall hip health and function. Specifically, the labrum: Facilitates the hip’s range of motion, allowing the thigh to rotate in every direction, including forward, backward, inward, and externally. Helps preserve proper alignment between the hip’s ball and socket.

Does the glenoid labrum prevent dislocation?

The labrum acts similar to a grommet. By deepening the socket, the labrum helps to prevent the ball from slipping over the edge of the shallow socket and dislocating. Ligaments between the shoulder blade and the upper arm bone also keep the shoulder from dislocating.

What attaches to the glenoid labrum?

The glenoid labrum (glenoid ligament) is a fibrocartilaginous structure (not a fibrocartilage as previously thought) rim attached around the margin of the glenoid cavity in the shoulder blade. The shoulder joint is considered a ball and socket joint.

What is a glenoid labrum?

The glenoid labrum is fibrocartilaginous tissue within the glenoid cavity of the shoulder joint. The purpose of the glenoid labrum is to provide stability and shock absorption within the joint.

What is the function of the glenoid labrum quizlet?

What is the function of the glenoid labrum? It extends the articular surface of the glenoid cavity and deepens the ball-and-socket joint.

Is the labrum part of the rotator cuff?

The shoulder labrum is a piece of soft cartilage in the socket-shaped joint in your shoulder bone. It cups the ball-shaped joint at the top of your upper arm bone, connecting the two joints. A group of four muscles called the rotator cuff helps the labrum keep the ball in the socket.

Is the labrum a tendon or ligament?

This rim of cartilage is called the “labrum”. Ligaments surround and connect the ball to the socket. These ligaments attach directly to the ball but attach to the labrum as opposed to the bone at the socket. The labrum attachment to the bone is the “weak link” of this setup.

What function does the glenoid cavity serve?

The glenoid cavity of the scapula (shoulder bone) articulates with the head of the humerus (upper-arm bone) at the shoulder joint, enabling the arm to move relative to the torso.

How does glenoid labrum tear?

Injuries to the tissue surrounding the shoulder socket can be caused by acute trauma or repetitive shoulder motions. Examples include falling on an outstretched arm, a direct blow to the shoulder, sudden pull or a violent overhead reach, such as occurs when trying to stop a fall or slide.

What is the function of the labrum in the shoulder joint quizlet?

What is the function of the labrum in the shoulder joint? It deepens the socket of the shoulder joint (glenoid cavity).

What is a glenoid?

The glenoid, or socket joint of the shoulder, is surrounded by a fibrocartilaginous supporting structure called the labrum. Injuries to the tissue surrounding the shoulder socket can be caused by acute trauma or repetitive shoulder motions.

What is glenoid labrum?

Do labrum tears heal?

It is believed that it takes at least four to six weeks for the labrum to reattach itself to the rim of the bone, and probably another four to six weeks to get strong. Once the labrum has healed to the rim of the bone, it should see stress very gradually so that it can gather strength.

Where is the glenoid cavity located and what is its purpose?

part of scapula …presents a shallow cavity, the glenoid cavity, which articulates with the head of the bone of the upper arm, the humerus, to form the shoulder joint. Overhanging the glenoid cavity is a beaklike projection, the coracoid process, which completes the shoulder socket.

How successful is labrum surgery?

The success rate for a labral repair ranges from 85% to 95%. The goal is to achieve a shoulder with no pain for lifting, throwing, or overhead activity.

What are some of the consequences of a large tear in the glenoid labrum?

Catching, locking, popping or grinding sensation. Decreased range of motion. Shoulder stiffness. Shoulder instability.

What is the function of the glenoid cavity?