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The subdeltoid muscle is located underneath the deltoid muscle and aids in the movement and rotation of the shoulder joint. Shoulder pain related to the subdeltoid is typically treated by a physical therapist. Bursitis is the most common cause of shoulder pain involving the subdeltoid, and injections are a common treatment. Different types of shoulder movements can help doctors diagnose which area of the shoulder is causing the pain.
In the human body, the subdeltoid is the muscle that sits underneath the deltoid muscle. It extends through the shoulder joint and is attached to the clavicle and long bone of the upper arm. It aids in the movement and rotation of the shoulder joint.
This muscle is part of the deltoid muscle group, also known as the shoulder joint muscle. Forms the rounded shape of the shoulder, extending from the top of the shoulder joint to cover the upper arm. It is so named because of its resemblance to the Greek letter delta, which is triangular in shape.
When pain occurs in the shoulder, it is typically localized to or related to the subdeltoid. The shoulder joint and muscle configuration experiences more friction in daily motion than almost any other joint and muscle group in the human body. Shoulder pain related to the subdeltoid is typically treated by a physical therapist.
A bursa is a fluid-filled sac located in some tissue with increased friction potential. Because of the high volume of motion that the shoulder engages in, the subdeltoid contains the subdeltoid bursa. This is located directly between the deltoid and the shoulder joint. Another, the subacromial bursa, is located under the acromion, the peak-shaped bony projection of the shoulder, and extends between the deltoid and the humorus.
Bursitis is a joint disease in which the bursa sac becomes inflamed and irritated. Subdeltoid bursitis is the most common type. Therefore, most shoulder pain involving the subdeltoid is caused by bursitis.
There are a wide variety of bursitis treatments. The most common is injecting an anesthetic directly into the shoulder. Typically, two to four such injections relieve the pain of the bursitis sufficiently and allow patients to return to normal activities.
For sufferers of this condition, pain occurs in the shoulder depending on the direction and type of movement of the shoulder joint. Lateral forward and backward movements generally generate different types of pain. Each movement is caused by a separate muscle, whether it uses the subdeltoid, deltoid or acromion. These differences can help doctors diagnose which area of the shoulder is causing the pain. They can then more accurately direct treatment and alleviate the patient’s suffering.
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