Table of Contents
What makes the glenoid cavity deep?
The cavity surface is covered with cartilage in the fresh state, and its margins, slightly raised, give attachment to a fibrocartilaginous structure, the glenoid labrum, which deepens the cavity. This cartilage is very susceptible to tearing.
What is the shallow socket of the shoulder called?
The humerus. This is the bone of the upper arm. The top of the humerus is rounded and fits into the shallow socket of the scapula, called the glenoid cavity, creating the shoulder’s ball-and-socket joint.
What increases depth of the joint at the glenoid fossa?
Labrum. The glenoid labrum is a ring composed of mostly dense fibrous tissue. The average depth of the glenoid fossa is 2.5 mm, however, the labrum helps to increase this depth. Although the labrum increases the depth and volume of the glenoid fossa, it does not seem to increase the stability of the glenohumeral joint.
What is the name of the structure which deepens the socket of the glenoid fossa?
The socket is deepened by 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.
What is the glenoid socket?
The glenoid is the socket part of the ball-and-socket shoulder joint. It’s part of the scapula (shoulder blade), which is a thin, broad bone that sits behind the rib cage.
What structure articulates with the glenoid cavity?
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.
What are the names of the tendons in your shoulder?
The tendons involved in the shoulder mainly include the long head of the biceps tendon and the tendons of the rotator cuff: supraspinatus, infraspinatus, teres minor and subscapularis. Other supporting tendons include the pectoralis minor, coracobrachialis and the short head of the biceps.
What is the glenoid fossa?
The glenoid cavity (glenoid fossa) is a shallow, vertically elongate concavity that receives the head of the humerus. From: The Human Bone Manual, 2005.
What bones make up the glenoid cavity?
The shoulder is a ball and socket joint made up of three bones, namely the humerus, scapula, and clavicle. The end of the humerus or upper arm bone forms the ball of the shoulder joint. An irregular shallow cavity in the scapula called the glenoid cavity forms the socket for the head of the humerus to fit in.
What is the cartilage in the shoulder called?
Inside the shoulder joint, there is a cartilage ring called the labrum that deepens the socket and increases stability without restricting movement.
What are the 3 glenohumeral ligaments?
Glenohumeral ligaments- Composed of a superior, middle, and inferior ligament, these three ligaments combine to form the glenohumeral joint capsule connecting the glenoid fossa to the humerus.