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The trapezius muscle is a large, triangular, paired muscle in the upper back, extending to the width of the shoulders and running from the skull to the middle of the back. It is involved in movements of the shoulder girdle and neck, maintaining and adjusting posture, and is therefore considered a muscle of the upper limb rather than of the back. The trapezius is vulnerable to injury and pain, with common causes being overuse, stress, nerve damage, and poor posture.
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What You'll Learn
Trapezius muscle anatomy
The trapezius muscle is a large, paired trapezoid-shaped muscle located in the upper back, extending to the width of the shoulders. It is often referred to as the 'traps' or 'trap muscles'. The muscle runs from the base of the neck down to the middle of the back, connecting the skull and vertebral column to the shoulder girdle. It has three sections: superior, middle, and inferior. Each section plays a role in specific movements of the neck and shoulders, such as moving the head, neck, and upper back, as well as maintaining and adjusting posture.
The trapezius is the most superficial of the extrinsic back muscles and is part of the musculoskeletal system. It overlies other muscles in this group, such as the rhomboids and levator scapulae. Deep to the trapezius muscle lies the serratus posterior superior, which is part of the intermediate layer of extrinsic muscles of the back. The trapezius also covers several muscles of the superficial layer of the intrinsic muscle group, including the splenius capitis and splenius cervicis.
The main function of the trapezius muscle is to stabilise and control the scapula during movements of the shoulder and upper limb. It works in conjunction with several other muscles to produce coordinated movements, primarily involving the scapula. For example, the rhomboids work with the trapezius to retract and stabilise the scapula, playing a crucial role in shoulder movement and posture. The upper fibres of the trapezius elevate the scapulae, the middle fibres retract them, and the lower fibres depress them.
The trapezius muscle can become painful or sore due to various reasons, including overuse, stress, poor posture, injury, and nerve damage. Certain stretches, exercises, and home remedies can help ease the pain and keep the muscle flexible. However, anyone experiencing ongoing pain and limited movement should consult a doctor or physical therapist.
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Trapezius muscle function
The trapezius muscle is a large, paired muscle in the upper back, extending to the width of the shoulders and running from the skull to the middle of the back. It is involved in several functions, including:
Posture Maintenance and Movement
The trapezius muscle helps maintain correct posture and moves the upper back, neck, and head. Slouching or slumping can put extra tension on the trapezius, pulling it out of alignment. Poor posture can also cause the muscle to shorten and tighten over time.
Stabilization of the Scapula
The trapezius muscle's main function is to stabilize the scapula (shoulder blade) and control its movement during shoulder and upper limb actions. It works with several other muscles to achieve this, including the rhomboids, levator scapulae, serratus anterior, latissimus dorsi, and pectoralis minor.
Elevation and Rotation of the Scapula
The trapezius assists in elevating the scapula, with the upper fibres playing a crucial role in this action. It also helps with the downward rotation of the scapula, working with the serratus anterior and latissimus dorsi muscles.
Shoulder Abduction
The trapezius assists in shoulder abduction, particularly when the arm is lifted above 90 degrees. It works with the supraspinatus muscle to initiate the first 15 degrees of abduction, providing the necessary lift.
Neck Movement
The trapezius is involved in neck movements, including side bending and turning the head. When the scapula is fixed, it assists in tilting the neck to the side or extending it backward.
Preventing Scapular Winging
The trapezius works with the serratus anterior muscle to prevent scapular winging, ensuring efficient shoulder movement.
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Trapezius muscle pain
The trapezius muscle is a large, paired trapezoid-shaped muscle in the upper back, which runs from the base of the neck down to the middle of the back. It is used a lot throughout the day, helping with head, neck and upper back movement, as well as maintaining and adjusting posture.
Pain in the trapezius can manifest as muscle spasms or cramps, pain between the shoulder blades, limited mobility, decreased range of motion, muscle weakness, neck and shoulder stiffness, and swelling, bruising or tenderness in the shoulders, neck or back.
Stress is a common cause of trapezius pain, as it can cause you to squeeze your muscles without realising, especially in the upper back, neck and shoulders. Other causes include muscle strains, nerve damage, and posture issues such as slouching, which can put extra tension on the trapezius and other upper back muscles.
To avoid trapezius pain, it is recommended that you exercise and stretch to improve your range of motion, strengthen muscles and relax tight muscles. Yoga, Pilates and other gentle exercises can be beneficial. It is important not to overdo it when exercising, and to stop if you feel pain. Maintaining a healthy weight can also reduce the risk of trapezius muscle strain.
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Trapezius muscle stretches
The trapezius muscle is a large, flat, triangular muscle located in the upper back and neck. It extends from the base of the skull to the lower thoracic spine, and it covers a significant portion of the back and sides of the neck. The trapezius muscle has several important functions, including moving the scapula (shoulder blade) and supporting the arm. It also plays a role in maintaining posture and rotating the head and neck. Because of its involvement in a wide range of movements, the trapezius muscle is commonly tight or tense, especially in people who spend a lot of time sitting or hunched over.
Stretching the trapezius muscle can help relieve tension, improve flexibility, and reduce the risk of injury. Here are some effective stretches for the trapezius muscle:
Neck Stretch: This stretch targets the upper trapezius and helps relieve neck tension. Sit or stand tall with a straight back. Gently tilt your head to one side, using your chin to touch your chest. Hold for 15–30 seconds, then slowly bring your head back to the starting position. Repeat on the other side.
Shoulder Roll: This stretch works the entire trapezius muscle and helps improve flexibility and range of motion. Stand or sit with a straight back. Lift your shoulders up toward your ears, then roll them backward in a circular motion, and finally, drop them down. Repeat this rolling motion in reverse, lifting your shoulders up, rolling them forward, and then dropping them down. Do this for 10–15 seconds, taking slow and controlled rolls.
Overhead Stretch: This stretch focuses on the middle and lower trapezius. Stand or sit with a straight back and lift your arms parallel to the floor, palms facing down. Reach your arms overhead, keeping your palms facing down, and hold for 15–30 seconds. Return to the starting position and relax.
Child's Pose: This yoga pose stretches the upper trapezius and provides a relaxing stretch. Kneel on the floor with your knees wider than hip-width apart. Lean forward, resting your torso between your thighs and your forehead on the floor. Extend your arms by your sides, palms facing down. Hold this pose for 30 seconds to a minute, breathing deeply.
It is important to stretch the trapezius muscle regularly to maintain flexibility and prevent tension from building up. These stretches can be done daily to help keep the muscle loose and supple, which can also help improve posture and reduce neck and shoulder pain. Remember to breathe deeply during each stretch and listen to your body, never pushing yourself beyond a comfortable range of motion.
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Trapezius muscle injuries
The trapezius muscle is a large, flat, kite-shaped muscle located in the upper back and neck. It extends from the base of the skull to the lower thoracic spine, and it covers a significant portion of the back and sides of the neck. The trapezius muscle has several important functions, including moving and stabilizing the scapula (shoulder blade) and supporting the arm during upper body movements. It also plays a role in breathing by assisting in the elevation of the rib cage. Because of its involvement in a wide range of movements, the trapezius muscle is susceptible to various injuries.
One of the most common trapezius muscle injuries is a strain, which occurs when the muscle fibers or their attachments are stretched or torn. Strains can range from mild to severe, depending on the extent of the damage. Symptoms of a trapezius muscle strain include pain, tenderness, swelling, bruising, and decreased range of motion in the shoulder and neck areas. In more severe cases, there may be a palpable gap or defect in the muscle, and the contour of the trapezius muscle may appear distorted.
Another type of injury that can affect the trapezius muscle is a muscle tear. Muscle tears can be partial or complete and often result from acute trauma or excessive stretching. Individuals with a trapezius muscle tear may experience sudden pain, weakness, and an audible "pop" or "snap" during the injury. Depending on the severity and location of the tear, there may be significant functional impairment and deformity. Complete tears usually require surgical repair, followed by a comprehensive rehabilitation program.
To prevent trapezius muscle injuries, it is important to maintain proper posture, practice correct technique during physical activities, and stretch and strengthen the muscles of the shoulder and neck appropriately. Cross-training and varying workout routines can also help reduce the risk of overuse injuries. For individuals who develop trapezius muscle injuries, treatment options may include rest, ice, compression, and elevation (RICE protocol), non-steroidal anti-inflammatory drugs (NSAIDs), and physical therapy. In severe cases, such as complete muscle tears, surgery may be necessary to repair the damaged muscle and restore function.
In summary, trapezius muscle injuries can have a significant impact on an individual's quality of life, affecting their ability to perform daily tasks and participate in physical activities. It is important to recognize the signs and symptoms of trapezius muscle strains and tears, as early intervention can improve outcomes. Preventative measures, such as maintaining good posture, practicing correct technique, and cross-training, can help reduce the risk of developing trapezius muscle injuries. For those suffering from trapezius muscle injuries, a combination of conservative treatments and, in severe cases, surgical intervention, can help promote healing and restore function.
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Frequently asked questions
The trapezius muscle is a large, triangular, paired muscle located on the upper back.
The main function of the trapezius is to stabilize the scapula and control it during movements of the shoulder and upper limb. It also assists in neck and head movement.
The trapezius is made up of long muscle fibres that span a large width of the upper back. It has three sections: superior, middle, and inferior.
Trapezius muscle pain can be caused by overuse, injuries, nerve damage, stress, and poor posture.
Trapezius muscle pain can be relieved by resting the muscle, applying ice, using heat, and taking over-the-counter pain relievers or topical creams. Stretching the muscle can also help prevent and relieve pain.
