infraspinatus trigger points

Infraspinatus Trigger Points: Causes, Symptoms, and Treatment Options

If you’re experiencing pain or discomfort in your shoulder, it could be due to infraspinatus trigger points. The infraspinatus muscle is located in the shoulder blade area and is responsible for rotating the arm outwards. When this muscle becomes tight or strained, it can develop trigger points that cause pain and discomfort.

Trigger points are areas of muscle that are in a constant state of contraction, which can lead to pain and discomfort. In the case of infraspinatus trigger points, the pain is typically felt in the shoulder area and can radiate down the arm. This pain can be mild to severe and can be exacerbated by certain movements or activities.

If you’re experiencing pain or discomfort in your shoulder, it’s important to seek medical attention to determine the cause. Infraspinatus trigger points can be treated with various therapies, including massage, stretching, and physical therapy. With proper treatment, you can alleviate pain and discomfort and improve your range of motion in the shoulder.

Anatomy of the Infraspinatus Muscle

The infraspinatus muscle is one of the four muscles that make up the rotator cuff in the shoulder. It is located on the posterior (back) aspect of the shoulder blade and connects to the upper arm bone (humerus). The muscle is triangular in shape and is covered by a layer of connective tissue called fascia.

Location and Function

The infraspinatus muscle originates from the infraspinous fossa, a depression on the back of the shoulder blade. It inserts onto the greater tubercle of the humerus, which is a bony prominence on the upper arm bone. The muscle is responsible for externally rotating the shoulder joint, which means it helps to turn the arm away from the body. It also helps to stabilize the shoulder joint during overhead movements.

infraspinatus trigger points anatomy

Trigger Points in the Infraspinatus Muscle

Trigger points are areas of muscle tissue that are hyperirritable and can cause pain, weakness, and a restricted range of motion. In the infraspinatus muscle, trigger points can develop in the belly of the muscle or at its attachment to the humerus. These trigger points can refer pain to the shoulder blade, upper arm, and even down the forearm.

Some common causes of trigger points in the infraspinatus muscle include overuse, poor posture, and trauma to the shoulder. Treatment for trigger points may include manual therapy, stretching, and strengthening exercises. In some cases, trigger point injections or dry needling may be recommended.

Causes of Infraspinatus Trigger Points

If you are experiencing pain in your shoulder, it may be due to infraspinatus trigger points. These trigger points can be caused by a variety of factors, including:

Overuse and Repetitive Motion

Overuse and repetitive motion can cause infraspinatus trigger points to develop. This is because the muscle is being used too frequently, causing it to become fatigued and eventually leading to the development of trigger points. This is common in athletes who engage in sports that involve repetitive overhead motions, such as baseball players or swimmers.

Poor Posture and Ergonomics

Poor posture and ergonomics can also contribute to the development of infraspinatus trigger points. When you sit or stand with poor posture, your body is not properly aligned, which can cause tension and stress to build up in your muscles. This can lead to the development of trigger points in the infraspinatus muscle.

Direct Trauma

Direct trauma, such as a fall or a blow to the shoulder, can cause infraspinatus trigger points to develop. This is because the trauma can cause damage to the muscle fibers, leading to the development of trigger points. This is common in individuals who have been in car accidents or who have suffered a sports injury.

Symptoms of Infraspinatus Trigger Points

Pain and Discomfort

If you have infraspinatus trigger points, you may experience pain and discomfort in your shoulder area. The pain may be sharp or dull, and it may worsen when you move your arm. You may also feel tenderness in the affected area.

Limited Range of Motion

In addition to pain, you may also experience a limited range of motion in your shoulder. You may find it difficult to raise your arm above your head, reach behind your back, or perform other movements that involve your shoulder. This can impact your ability to perform everyday tasks and activities.

Muscle Weakness and Fatigue

In some cases, infraspinatus trigger points can also cause muscle weakness and fatigue. You may find it difficult to hold objects or perform tasks that require you to use your shoulder muscles for an extended period of time. You may also experience general fatigue and weakness in your shoulder area.

If you are experiencing any of these symptoms, it is important to seek medical attention. Your healthcare provider can help diagnose the underlying cause of your symptoms and recommend appropriate treatment options.

Diagnosis of Infraspinatus Trigger Points

If you are experiencing shoulder pain and suspect it may be due to infraspinatus trigger points, your doctor will likely perform a physical examination and may order imaging tests to confirm the diagnosis.

Physical Examination

Your doctor will first ask you about your symptoms and medical history. They will then perform a physical examination of your shoulder, including assessing your range of motion, strength, and any areas of tenderness or pain.

During the physical examination, your doctor may also perform specific tests to assess for infraspinatus trigger points. One common test is the infraspinatus muscle test, where the doctor will ask you to raise your arm out to the side and resist as they push down on your arm. If you have infraspinatus trigger points, this test may cause pain or weakness in your shoulder.

Imaging Tests

If your doctor suspects that you have infraspinatus trigger points, they may order imaging tests to confirm the diagnosis and rule out other possible causes of your shoulder pain. Imaging tests may include X-rays, MRI, or ultrasound.

X-rays can help rule out other causes of shoulder pain, such as fractures or arthritis. MRI and ultrasound can provide more detailed images of the soft tissues in your shoulder, allowing your doctor to identify any areas of inflammation or damage to the infraspinatus muscle.

It is important to note that imaging tests alone cannot diagnose infraspinatus trigger points, and a physical examination is typically necessary to confirm the diagnosis.

Treatment of Infraspinatus Trigger Points

Manual Therapy

If you are suffering from infraspinatus trigger points, manual therapy can be an effective treatment option. This type of therapy involves a qualified therapist using their hands to manipulate the soft tissues in your shoulder area. They may use techniques such as deep tissue massage, myofascial release, or trigger point therapy to help alleviate your pain and discomfort.

Manual therapy can help to break up adhesions and scar tissue that may be contributing to your trigger points. It can also help to improve blood flow and circulation to the affected area, which can promote healing.

Stretching and Strengthening Exercises

In addition to manual therapy, stretching and strengthening exercises can also be helpful in treating infraspinatus trigger points. Your therapist may recommend specific exercises that target the muscles in your shoulder and upper back.

Stretching can help to improve flexibility and range of motion in your shoulder joint, while strengthening exercises can help to build up the muscles that support your shoulder blade. This can help to reduce the strain on your infraspinatus muscle and prevent trigger points from forming.

Medications and Injections

If your pain is severe, your doctor may recommend medications or injections to help manage your symptoms. Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen can help to reduce pain and inflammation. Injections of corticosteroids or lidocaine can also be effective in reducing pain and inflammation in the affected area.

It is important to note that while medications and injections can be helpful in managing pain, they do not address the underlying cause of your trigger points. For long-term relief, it is important to address the root cause of your pain through manual therapy, stretching, and strengthening exercises.

Prevention of Infraspinatus Trigger Points

Proper Posture and Ergonomics

One of the most effective ways to prevent infraspinatus trigger points is to maintain proper posture and ergonomics. When sitting, ensure that your back is straight and your shoulders are relaxed. Avoid slouching or leaning forward for extended periods of time. If you work at a desk, make sure your computer monitor is at eye level and your keyboard and mouse are at a comfortable distance.

Regular Exercise and Stretching

Regular exercise and stretching can also help prevent infraspinatus trigger points. Strengthening exercises for the shoulder and upper back can help improve posture and reduce the likelihood of developing trigger points. Stretching exercises can help improve flexibility and reduce tension in the muscles. Consider incorporating exercises such as shoulder rolls, wall angels, and doorway stretches into your daily routine.

In addition to exercise and stretching, it is important to take frequent breaks from sitting or standing in the same position for extended periods of time. This can help reduce the risk of developing trigger points and alleviate any existing tension in the muscles.

Wrap Up

Now that you know about the infraspinatus muscle and trigger points, you can take steps to prevent and treat pain and discomfort in your shoulder. Remember to stretch and warm up properly before engaging in any physical activity, and to take frequent breaks if you work at a desk or computer for extended periods of time.

If you experience pain or discomfort in your shoulder, try some of the self-massage techniques we discussed earlier, or consider seeing a healthcare professional for further evaluation and treatment.

It’s important to listen to your body and take care of yourself to prevent and manage pain and discomfort. With the knowledge and tools you now have, you can take control of your shoulder health and live a more comfortable and active life.





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