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The neck is a complex structure of bones, muscles, nerves, blood vessels, and connective tissues. There are about 30 muscles in the neck, which support the head and enable a range of movements, including rotating the head, flexing the neck, and moving the head upward. Neck muscles also assist with chewing, swallowing, and breathing. Ligaments and tendons work together with neck muscles to support and move the neck and head. Some common muscles involved with neck pain include the sternocleidomastoid, trapezius, levator scapulae, scalenes, deep cervical flexors, erector spinae, and suboccipitals.
| Characteristics | Values |
|---|---|
| Number of muscles in the neck | 30 |
| Muscle groups | 4 |
| Muscle functions | Support the head, stabilize the cervical spine, enable a range of movements, assist with chewing, swallowing, breathing, and making facial expressions |
| Muscle names | Trapezius, Erector Spinae, Deep Cervical Flexors, Suboccipitals, Scalene, Sternocleidomastoid, Levator Scapulae |
| Muscle attachments | Bones, Tendons |
| Muscle injuries | Strains, Stiffness, Pain, Numbness, Tingling, Weakness |
| Muscle stress causes | Technology use, poor posture |
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What You'll Learn
- The trapezius muscle helps to extend the head and neck, rotate the head, and lift the shoulder blade
- Erector spinae muscles support posture, rotate the neck, and extend the neck backward
- Deep cervical flexors help to flex the neck forward and stabilise the cervical spine
- Suboccipitals are four pairs of small muscles that connect the cervical spine to the skull, aiding head extension and rotation
- Scalene muscles are three pairs of lateral neck muscles that help with neck flexion and side bending
The trapezius muscle helps to extend the head and neck, rotate the head, and lift the shoulder blade
The neck is supported by about 30 muscles, which enable a range of movements, including extending the head and neck, rotating the head, and lifting the shoulder blade. One of the most notable muscles in this group is the trapezius muscle.
The trapezius muscle is a large, trapezoid-shaped muscle that spans from the base of the skull down the cervical spine, into the middle of the back, and out to the shoulder blade. The muscle gets its name from its shape, as the two trapezius muscles together form a kite-like trapezoid. The trapezius muscle is divided into three parts: descending (superior), ascending (inferior), and middle.
The trapezius muscle also helps with tilting the neck and rotating the shoulder blade upward, which occurs when you lift your arm to the side. This movement is smooth and stable when the shoulders, neck, and upper back are in good alignment and the muscles are flexible. The trapezius muscle works with the levator scapulae muscle to lift and rotate the shoulder, and with the serratus anterior muscle to rotate the scapula upward during arm elevation.
In addition to its role in neck extension and rotation, the trapezius muscle is crucial for maintaining posture and moving the upper back, neck, and head. It helps with various motions, including turning the head, twisting the torso, shrugging the shoulders, and moving the shoulder during arm lifting or throwing. The trapezius muscle supports the body and enables movement, and it is used almost constantly throughout the day.
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Erector spinae muscles support posture, rotate the neck, and extend the neck backward
The neck muscles are skeletal muscles, meaning they are attached to bones by tendons. They are voluntary muscles, meaning we can control their movement. There are about 30 muscles in the neck, which help stabilise and support the head and upper back. They also assist with chewing, swallowing, breathing, and a range of movements.
The erector spinae muscles are one of the core and paraspinal muscles. They are a group of muscles that lie on either side of the vertebral column, between the base of the cranium and the pelvis. The erector spinae muscles are divided into three groups, from medial to lateral: iliocostalis, longissimus, and spinalis.
The iliocostalis muscles are the most lateral erector spinae muscles. They originate from the sacrum, erector spinae aponeurosis, and iliac crest. The longissimus muscles are the central erector spinae muscles and are the thickest and longest. They are divided into three regional groups, from superior to inferior: longissimus capitis, longissimus colli, and longissimus thoracis. The spinalis muscles are the most medial erector spinae muscles. They are also divided into three regional groups, from superior to inferior: spinalis capitis, spinalis colli, and spinalis thoracis.
The erector spinae muscles play a key role in supporting posture, rotating the neck, and extending the neck backward. They also help maintain posture by steadying the spine on the pelvis during walking. The erector spinae muscles are important for spinal stability, and their increased activity can help compensate for delays in increasing the stiffness of the lumbar spine.
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Deep cervical flexors help to flex the neck forward and stabilise the cervical spine
The neck is a crucial part of the body, containing about 30 muscles that enable a range of movements and support the head. The neck muscles also assist with chewing, swallowing, and breathing. The cervical spine, or neck area of the spine, consists of seven stacked bones called vertebrae, which are connected by facet joints, allowing for forward, backward, and twisting motions of the neck.
The deep cervical flexors, or prevertebral cervical muscles, are a group of muscles that run down the front of the cervical spine. They are essential for flexing the neck forward and stabilising the cervical spine. These muscles are comprised of the longus capitus and longus colli muscles. The deep cervical flexors are often likened to the core muscles for the neck. Despite their small size, they are significant antagonists of the large cervical spine extensors.
The deep cervical flexors play a crucial role in maintaining the natural lordosis, or curvature, of the cervical spine. When these muscles become weak or dysfunctional, it can lead to a range of symptoms and impairments that affect daily life. For example, individuals may experience tension headaches that radiate from the neck to the head or behind the eyes. Poor posture, such as sitting with the head forward or having rounded shoulders, can contribute to weakness in the deep cervical flexors and subsequent dysfunction.
Additionally, muscle imbalances can occur when the neck and shoulder muscles are overly tight or active, while the deep cervical flexors are weak. This disruption in the natural balance and coordination of neck muscles can lead to a reduced range of motion and difficulty in flexing, extending, rotating, or tilting the head. Trauma or injury to the neck, such as whiplash, can also damage the deep cervical flexors and impact their function.
To address deep cervical flexor dysfunction, targeted interventions such as physiotherapy can be beneficial. Working with a physiotherapist can help develop a tailored rehabilitation program focused on strengthening the deep cervical flexors, improving posture, and correcting muscle imbalances. Specific exercises such as chin tucks, head nods, and cervical isometric holds can be incorporated to enhance strength, endurance, and coordination in the deep cervical flexors.
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Suboccipitals are four pairs of small muscles that connect the cervical spine to the skull, aiding head extension and rotation
The neck muscles support the head and enable a wide range of movements, including chewing, swallowing, and breathing, and facial expressions. There are about 30 muscles in the neck, and they are all skeletal muscles, meaning they are attached to bones by tendons. These muscles are under our voluntary control.
The suboccipitals are four pairs of small muscles that connect the cervical spine to the skull. They aid in head extension and rotation, providing postural support to the head and neck. The four muscles that make up the suboccipitals are the rectus capitis posterior major, rectus capitis posterior minor, obliquus capitis superior, and obliquus capitis inferior. These muscles are innervated by the suboccipital nerve, which is formed by the dorsal ramus of C1. The suboccipital nerve and the vertebral artery can be localized using the suboccipital triangle, an anatomical landmark formed by three of the four suboccipital muscles.
The suboccipital muscles are clinically important due to their proximity to the vertebral artery and their role in providing surgical access to the posterior cranial fossa. Various cranial pathologies can be accessed through a suboccipital surgical approach, which requires a detailed understanding of the posterior cervical region. Additionally, the suboccipitals have been implicated in the development of cervicogenic headaches due to their connection with the dura mater.
The suboccipitals work in conjunction with other muscles connected to the neck, such as the trapezius, levator scapulae, scalenes, deep cervical flexors, and erector spinae, to facilitate neck movements and maintain stability.
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Scalene muscles are three pairs of lateral neck muscles that help with neck flexion and side bending
The neck muscles are a group of around 30 muscles that support the head and enable a range of movements, including chewing, swallowing, and breathing. They also assist with facial expressions and are essential for maintaining good posture.
The scalene muscles are three pairs of muscles located in the lateral aspect of the neck: the anterior, middle, and posterior scalene. They form part of the floor of the posterior triangle of the neck. The scalene muscles act as accessory muscles of respiration, elevating the first and second ribs and increasing intrathoracic volume, which aids breathing. This is particularly important in patients with respiratory distress, where the scalene muscles may be used to help ventilate the lungs more effectively.
The scalene muscles also play a role in neck movements, including lateral flexion and neck flexion. Lateral flexion of the neck occurs when the neck moves from a straight position to a lateral bend, such as when moving the head from side to side. The scalene muscles, along with other muscle groups, facilitate this movement. Neck flexion, on the other hand, is the action of bringing the chin down towards the chest, and the anterior scalene is specifically involved in this movement.
The scalene muscles are deep and have a complex functional role, contributing to postural stability between the neck and head. They are an important part of neck anatomy, with several significant structures located between and around them. For example, the brachial plexus and subclavian artery pass between the anterior and middle scalene muscles, providing an essential anatomical landmark in anaesthetics for performing an interscalene block.
In summary, the scalene muscles are three pairs of lateral neck muscles that play a crucial role in neck flexion, lateral bending, respiration, and maintaining postural stability between the neck and head. Their function and anatomical position make them an essential component of the neck's overall structure and movement.
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Frequently asked questions
Neck muscles are skeletal muscles that are attached to bones by tendons. They help us perform a variety of movements, such as chewing, swallowing, and moving our heads.
The neck muscles can be categorized into four main groups: suboccipitals, scalenes, the trapezius, and the erector spinae.
The suboccipital muscles are responsible for rotating the head and extending the neck. They consist of four pairs of small muscles that connect the top of the cervical spine with the base of the skull.
The trapezius muscle helps extend the head upward or neck backward, rotate or turn the head, and lift or depress the shoulder blade. It is a large surface muscle that spans from the base of the skull down the spine to the middle back and out to the shoulder blade.
