Subarticular tubercle

Subarticular tubercle: anatomy and function

The subglenoid tubercle (also known as the subscapularis tubercle) is a protrusion on the inferior surface of the scapula located beneath the glenoid fossa. It is the site of attachment of the large horny muscle of the shoulder (lat. musculus subscapularis), which rotates the shoulder inward and holds it in the glenoid fossa.

The anatomy of the subarticular tubercle may vary slightly depending on the source. In Latin it is known as tuberculum infraglenoidale, in English as tuberosity of the infraglenoid tubercle, and in Japanese as tuberositas infraarticularis.

The subglenoid tubercle has an important function in maintaining the stability of the shoulder joint. Attached to the subglenoid tubercle, the horny major muscle is one of four rotator cuff muscles that help maintain the joint in position.

Damage to the subglenoid tubercle can lead to disruption of the function of the muscle attached to it, as well as disruption of the stability of the shoulder joint. This can happen, for example, due to injury or prolonged repetitive use of the hand in sports or professional activities.

In conclusion, the subglenoid tubercle is an important element of the anatomy of the shoulder joint. It serves as the attachment point for a muscle that provides stability to the joint and allows certain movements of the shoulder. If the subglenoid tubercle is damaged, muscle function and joint stability may be impaired, which can lead to pain and impaired movement in the shoulder. If you experience these symptoms, see your doctor for diagnosis and treatment.

A joint, at its core, is the articulation of bones in the joints, ensuring the mobility of the joint in various directions. The subarticular tubercle is a cartilaginous protrusion on the articular surface of the scapula. This is an anatomical formation that borders the upper shoulder joint.

In general, the subscapular tuberosity is a fairly large oval structure, the surface of which is covered with tubercles of 5 to 15 pieces. They are formed by the protruding processes of the cancellous bone of the shoulder and the sub-arm. The surface of the tuberosity itself is rough, they tend to be blunt and without sharp corners. There are no teeth or claws, just as there is no itching.

The structure itself forms a gap for the transverse layer of muscles that underneath there are several tendons of the rotator cuff, as well as for the periarticular ligament that runs around the fibrous edge of the scapula. These bands protect the upper back from overload. The lowest part of the tuberous surface is embedded in the head of the scapula and is used to attach articular muscles to it.

It is worth noting that the above-described protrusion is made possible by the periosteum. This is a weak point when cutting; bone growths easily form on it. Sometimes, when this growth appears, a doctor tries to remove it. Today this is done using electrocoagulation or laser therapy. Such manipulation is necessary if the tuberous protrusion prevents the correction of any plane of the upper limb. When it interferes with the development of the upper limbs, it is difficult to hold objects with your hand. Danger