What Is The Infraspinatus?

The infraspinatus muscles are made up of three muscles that make up the rotator cuff the infraspinatus is the most prominent. The infraspinatus muscles are mainly made up of the infraspinatusteres major, infraspinatus minor, and subscapulius. These muscles also act to stabilise the glenohuma joint in the shoulder. The tendons of these tendons are smooth, non-organic, and heterogeneous, which is what contributes to their susceptibility to injury.

Significance of Infraspinatus

The tendons of the infraspinatus are attached to the supraspinatus, or upper chest bone. The supraspinatus helps support the weight of the biceps, triceps, forearms, shoulders, and head. This bone in the body supports the weight of all of our internal organs. When there is a tear in this area of the rotator cuff, the other two muscles will compensate and pull the arm towards the side with the tear.

Causes of Infraspinatus

There are many causes for the infraspinatus tendinitis. A partial tear is often a result of external forces. For example, it may be caused by external force applied on the joint. The internal rotator cuff muscle or tendon is not affected and the tear occurs.

Another cause of a rotator cuff pain is injury to the tendons themselves. This is called the infraspinatus tendinitis. This type of pain can also be due to mechanical forces. Mechanical forces are commonly used in athletic training. Examples include throwing the ball into a diving throw or lifting a heavy object. These types of exercises tend to irritate the tendons.

Effects of Infraspinatus

Injury to the muscle itself can result in a severe case of pain. This can occur if there is an oblique pull or impingement syndrome. The term oblique refers to the outer aspect of a muscle. In this syndrome, the rotator cuff muscle pulls away from the humerus. This causes severe pain and can lead to chronic problems.

Both of these problems, anteroposterior deltoid muscle weakness and impingement syndrome, occur at the glenohuma joint. The glenohuma joint is in front of the anterior shoulder is behind the adductor minor. This makes the glenohuma and anterior shoulder area a common place for injuries to occur. This area has a large number of muscles and ligaments that can be very vulnerable to injury and chronic issues.

Infraspinatus Muscles

The infraspinatus muscles are two small muscles, based upon the size of the forearm. These muscles are located inside the coracoacromial ligament. The infraspinatus muscle helps maintain the integrity of the elbow joint. The anatomy of this muscle is very complex. There are five bones in the infraspinatus muscle structure including three heads that are classified as penetrating, intermediate, and cancellous.

Overstressed Or Understressed Shoulder

The muscle strength and shape changes with the aging process. The degree to which a shoulder joint is overstressed or understressed determines how much a person will use their shoulder joint for activities like turning in the chair or for long airplane rides. Overstressing a shoulder can cause tremendous pain in the muscles of the neck and upper back. The opposite is also true. Understressing a shoulder can cause tremendous pain in the muscles of the arms and upper back and even result in a loss of arm and/or upper back function.

Because of the complicated anatomy of the triceps, it is not surprising that they are also among the most injured muscles in the body. The triceps are three muscles that make up the triceps barbell. Triceps barbell exercises involve the movement of the triceps to the side of the body from short rotary moves such as shoulder shrugs and shoulder presses. It is important to train the triceps barbell with proper form to prevent injury.

Problematic Area

One of the most common and problematic areas of the body is the deltoid region, which is found at the front end of the shoulder. This area consists of a broad cuff that extends down over the front of the arm and into the deltoid. The deltoids have a deep insertion into the scapula and are the main muscle responsible for providing shoulder movements during normal and overhead movements. Because of the wide angle of the scapula, it is very easy to cause inflammation or strain in this region. Common symptoms include pain on the outer side of the shoulder, a feeling of weakness across the upper arms, the feeling of tightness around the shoulder blades, weakness in holding onto an object, and a loss of shoulder rotation ability. The infraspinatus often originates in this area.

Cause of Shoulder Joint Pain

The infraspinatus tendon inserts into the scapula through the hole in the bone called the teres minor. This opening is larger than usual and is especially large in the shoulders. Unfortunately, because the teres minor muscle plays such an important role in the movement of the scapula, a common cause of shoulder joint pain is a lack of strength in this muscle. If this muscle is weak, it will be difficult for the shoulder joint to rotate fully, which can cause a pain in the region known as scapular depression. Weakness in the rotator cuff causes the infraspinatus to pull on the tendon of the supraspinatus, creating pain.


Infraspinatus exercises usually focus on infraspinatus torsi, the front part of the infraspinatus muscle. This muscle stabilizes the shoulder joint and is very important for proper burial healing in the joint. Good infraspinatus exercises are stretches and stabilization movements for both the upper and lower halves of the body. The supraspinatus is usually worked separately because of its proximity to the dominant arm.

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