What You Should Know About Trigger Points and Scalene Muscles

Introduction

The body is a functional machine that requires many muscles, organs, ligaments, joints, and tissues that provide everyday movements. In the upper extremities, the head, neck, and shoulders have many muscles, ligaments, and tissues that work together with the nerve roots from the nervous system that provides sensory-motor function to make the fingers move, the shoulders rotate, and the head turns from side to side. When injuries or common issues affect the muscles in the head, neck, or shoulders, it can cause small nodules to form along the muscle fibers of the affected muscle area and cause referred pain in different locations of the body. Today’s article looks at the scalene muscles, how trigger points affect the scalene muscles while mimicking shoulder pain, and how to manage chronic pain associated with trigger points. We refer patients to certified providers who specialize in musculoskeletal treatments to aid individuals suffering from trigger points related to the shoulders affecting the scalene muscles. We also guide our patients by referring them to our associated medical providers based on their examination when appropriate. We ensure to find that education is the solution to asking our providers insightful questions. Dr. Jimenez DC observes this information as an educational service only. Disclaimer

What Are The Scalene Muscles?

Have you been experiencing tingling sensations running down your fingertips? Do you feel stiffness when rotating your neck or shoulders? Or do you feel muscle soreness in your shoulders? Many individuals who are feeling any of these symptoms affecting their neck or shoulders could be dealing with trigger point pain along the scalene muscles. The scalene muscles play a crucial part in the head and neck as they are deep muscles positioned laterally on the cervical tract of the spine. These muscles have three different branches: the anterior, medius, and posterior, which play the role of being accessory breathing muscles while being an important contributor to head and neck movement. To that point, it allows stability to the cervical spine. The scalene muscles even help support and elevate the upper rib cage when a person is lifting, pulling, or carrying heavy objects. However, like most muscles in the body, the scalene muscles can be prone to injury and can develop issues that can affect the upper extremities of the body.

Trigger Points Affects The Scalene Muscles Mimicking Shoulder Pain

When common injuries like pulling a muscle when carrying a heavy object or even a traumatic injury like being involved in an auto accident can cause pain in the affected area, over time, if not treated, can cause various symptoms to overlap and affect the muscles. When the scalene muscles are affected by injuries, they can develop tiny nodules along the taut muscle fibers and become hyperirritable to the surrounding areas of the upper half of the body. This is known as trigger point pain and can mimic other chronic issues that affect different body areas. To that point, trigger points affecting the scalene muscles may mimic shoulder pain in the upper half of the body. Studies reveal that scalene myofascial pain is a regional pain syndrome that originates pain in the neck area and radiates pain down to the arm. Since trigger points mimic other chronic issues, it is often misdiagnosed as another neck pain associated with radiculopathy when the scalene muscles are affected. When this happens, the muscles become stiff and weak, causing a reduction in the range of movement. 

Studies reveal that when individuals suffer from acute whiplash-associated disorders, the local and referred pain can be elicited from active trigger points to reproduce neck and shoulder pain. This causes a higher disability that exhibits widespread pressure causing the muscles to be hypersensitive and reducing the cervical range of motion. Many individuals often complain about shoulder pain while rubbing the upper parts of their arms. The scalene muscle is affected by active trigger points, thus mimicking shoulder pain.

Scalenes Trigger Points-Video

Have you been feeling muscle stiffness in your neck or shoulders? Have you been experiencing a numbing sensation along your arms? Have you felt tenderness along your shoulders when you touch them? Many of these pain symptoms are associated with trigger points along the scalene muscles. The video above explains where the trigger points are located along the scalene muscles and how they are causing referred pain in the neck and shoulder areas. Many factors can lead to the causation of trigger point pain and overlap with other chronic issues that can affect the upper extremities of the body, using sleep as an example. Studies reveal that poor sleeping posture can affect the neck and shoulders, leading to muscle stiffness along the scalene muscles and developing trigger points over time. Fortunately, various ways to manage referred shoulder pain are associated with trigger points.

Management Of Chronic Shoulder Pain Associated With Trigger Points

Many individuals are referred to pain specialists that can alleviate trigger points along the scalene muscle to reduce the effects of shoulder and neck pain. When referred pain along the scalene muscles causes chronic shoulder pain associated with trigger points, many people often do various movements to alleviate the pain. However, it can cause more pain in the affected area and prevent relief from the neck and shoulders. Studies reveal that various treatments like physiotherapy, trigger point injections, manipulation of the cervical spine, or acupuncture can help relax and lengthen the muscle fibers associated with the scalene muscle. To that point, this allows the neck to extend further without pain and reduces the overlapping symptoms that affect the upper extremities of the body. 

Conclusion

The scalene muscles play a crucial part in the head and neck area as deep muscles are positioned laterally on the cervical tract of the spine. These muscles help elevate the upper chest and laterally bend the neck from side to side. When injuries affect the scalene muscles and form tiny nodules known as trigger points, it can cause referred pain to the shoulders and the neck. To that point, symptoms like numbing or tingling sensations can travel down the arms and fingers. Fortunately, available treatments can reduce the symptoms and manage myofascial trigger pain along the shoulders and neck associated with the scalene muscles. This allows a better range of motion to the neck and shoulder and prevents future trigger points from forming in the scalene muscles.

References

Abd Jalil, Nizar, et al. “Scalene Myofascial Pain Syndrome Mimicking Cervical Disc Prolapse: A Report of Two Cases.” The Malaysian Journal of Medical Sciences : MJMS, Penerbit Universiti Sains Malaysia, Jan. 2010, www.ncbi.nlm.nih.gov/pmc/articles/PMC3216145/.

Bordoni, Bruno, and Matthew Varacallo. “Anatomy, Head and Neck, Scalenus Muscle.” In: StatPearls [Internet]. Treasure Island (FL), StatPearls Publishing, 16 Apr. 2022, www.ncbi.nlm.nih.gov/books/NBK519058/.

Fernández-Pérez, Antonio Manuel, et al. “Muscle Trigger Points, Pressure Pain Threshold, and Cervical Range of Motion in Patients with High Level of Disability Related to Acute Whiplash Injury.” The Journal of Orthopaedic and Sports Physical Therapy, U.S. National Library of Medicine, July 2012, pubmed.ncbi.nlm.nih.gov/22677576/.

Lee, Won-Hwee, and Min-Seok Ko. “Effect of Sleep Posture on Neck Muscle Activity.” Journal of Physical Therapy Science, The Society of Physical Therapy Science, June 2017, www.ncbi.nlm.nih.gov/pmc/articles/PMC5468189/.

Thapa, Deepak, et al. “Management of Chronic Shoulder Pain with Restricted Mobility – a Case Series.” Indian Journal of Anaesthesia, Medknow Publications & Media Pvt Ltd, Nov. 2016, www.ncbi.nlm.nih.gov/pmc/articles/PMC5125193/.

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