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The neck is a complex structure of bones, muscles, nerves, blood vessels, and connective tissues. Neck muscles support the head and enable a range of movements, including chewing, swallowing, and breathing. The neck muscles can be divided into anterior, lateral, and posterior groups based on their position in the neck. The suboccipital muscles are a group of four pairs of small muscles that connect the top of the cervical spine with the base of the skull and help with head extension and rotation. The SCM muscle, or sternocleidomastoid, is the largest muscle in the front of the neck and allows you to bend your neck and turn or tilt your head. The trapezius muscle helps extend the head upward and neck backward.
| Characteristics | Values |
|---|---|
| Location | Front, sides, and back of the neck |
| Starting Point | Below the base of the skull |
| Ending Point | Near the middle of the back, around the shoulder blades |
| Categories | Anterior (front), lateral (side), and posterior (back) |
| Anterior Muscles | Superficial, suprahyoid, infrahyoid, and scalene muscles |
| Function | Support the head, enable a range of movements, assist with chewing, swallowing, and breathing |
| Superficial Muscles | Strap-like muscles in the back of the neck that help extend and rotate the head |
| Suboccipital Muscles | Help extend the head in different directions; located below the occipital bone at the base of the skull |
| Transversospinalis Muscles | Help move the head forward and backward, tilt it from side to side, and stabilize the spine |
| Skeletal Muscle Fibers | Contain red and white elastic fibers, giving them a striped appearance |
| Common Conditions | Strain, pain, tightness, and stiffness |
| Sternocleidomastoid (SCM) Muscle | Largest muscle in the front of the neck, allowing bending, turning, and tilting of the head |
| SCM Muscle Structure | Consists of parallel rows of muscular fibers, with a mix of white anaerobic and red aerobic fibers |
| SCM Muscle Maintenance | Manage stress, maintain good posture, stretching, physical therapy, and osteopathic manipulation |
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What You'll Learn
- The suboccipital muscles are four pairs of small muscles that help extend the neck
- The SCM muscle is the largest neck muscle at the front of the neck
- The trapezius muscle has three parts and can extend the head upward
- The levator scapulae muscle helps with lifting the shoulder blade and bending the neck
- The transversospinalis muscles help move the head forward and backward
The suboccipital muscles are four pairs of small muscles that help extend the neck
The neck is a complex structure of bones, muscles, nerves, blood vessels, lymphatics, and other connective tissues. It supports the skull while allowing for a wide range of movements. Neck muscles are innervated by cervical nerves and their branches and cranial nerves. These muscles support and stabilise the head, neck, and upper spine, enabling various movements and assisting with chewing, swallowing, and breathing.
The suboccipital muscles are four pairs of small muscles located just below the occipital bone at the base of the skull. They are named rectus capitis posterior major, rectus capitis posterior minor, obliquus capitis superior, and obliquus capitis inferior. These muscles are responsible for maintaining posture and enabling specific head movements, including extension, lateral flexion, and rotation.
The rectus capitis posterior major and rectus capitis posterior minor attach to the C2 and C1 vertebrae, respectively. The obliquus capitis superior also extends from the occiput to C1, while the obliquus capitis inferior originates from C2 and attaches to C1. These muscles are innervated by the suboccipital nerve, which is formed by the dorsal ramus of C1.
The suboccipital muscles form an important anatomical landmark, especially for surgeons operating in the posterior cervical region. This region includes the suboccipital triangle, where the vertebral artery and suboccipital nerve can be localised. The close proximity of the suboccipital muscles to the vertebral artery can be relevant in patients with atherosclerosis, as muscle contraction may lead to artery compression and reduced blood flow, resulting in dizziness and light-headedness.
In summary, the suboccipital muscles are four pairs of small muscles that contribute to neck extension and enable various head movements while also providing postural support for the head and neck.
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The SCM muscle is the largest neck muscle at the front of the neck
The neck is a complex structure of bones, muscles, nerves, blood vessels, lymphatics, and other connective tissues. The cervical spine, the bony part of the neck, supports the skull while allowing for movement. Neck muscles support the head and enable a range of movements, including chewing, swallowing, and breathing. They also assist in maintaining balance and protecting vital neurovascular structures.
The sternocleidomastoid (SCM) muscle is the largest muscle in the front of the neck. It is a powerful and thick muscle that allows you to bend, turn, and tilt your head. The SCM gets its name from its location and structure. "Sterno" refers to the sternum or breastbone, "cleido" refers to the clavicle or collarbone, and "mastoid" refers to the mastoid process, a section of bone at the base of the skull behind the ears.
The SCM muscle has two parts: the sternal head and the clavicular head. The sternal head begins at the breastbone and travels up both sides of the neck. The clavicular head starts at the centre of the collarbones and moves up both sides of the neck, merging with the sternal head near the base of the skull. The SCM muscle is easily palpable, and you can feel it on both sides of your neck just below the skin.
The SCM plays an important role in neck posture and body posture. It helps lift the sternum and clavicles during inhalation, creating space for the lungs to take in air. It also supports the temporomandibular joint (TMJ), which connects the jaw to the skull and enables the opening and closing of the mouth. SCM muscle injuries or tension can lead to pain and stiffness, requiring treatments such as stretching, physical therapy, or osteopathic manipulation.
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The trapezius muscle has three parts and can extend the head upward
The neck is a complex structure of bones, muscles, nerves, blood vessels, lymphatics, and other connective tissues. The muscles in the neck support the head and enable a range of movements, including chewing, swallowing, and breathing. The neck muscles also assist in scanning our surroundings and play a vital role in our survival.
The trapezius muscle is a large muscle in the upper back, with one on each side of the body. Each trapezius muscle has three sections, namely the upper, middle, and lower sections. These muscles run from the base of the neck across the shoulders and down to the middle of the back. The trapezius muscle is commonly referred to as the “traps” or “trap muscles."
The trapezius muscle helps to maintain posture and move the upper back, neck, and head. It works in conjunction with other muscles, such as the rhomboids and levator scapulae, to produce coordinated movements, especially those involving the scapula. The upper trapezius, in particular, is involved in neck movements and can be a source of neck pain or headaches.
The trapezius muscle can be palpated and massaged to reduce pain and tension. It is important to note that the upper trapezius should be relaxed at rest, and any tightness may indicate overuse. The trapezius muscle is a crucial part of our musculoskeletal system, supporting our body and enabling various movements throughout the day.
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The levator scapulae muscle helps with lifting the shoulder blade and bending the neck
The neck is a complex structure of bones, muscles, nerves, blood vessels, lymphatics, and connective tissues. Neck muscles support the head and enable a range of movements, including chewing, swallowing, and breathing. They also help with scanning our surroundings and interacting with our environment.
The levator scapulae, or levator scap, are two large superficial muscles that stretch along each side of the spine over the upper back and neck. The name comes from the Latin 'levare', meaning "to raise", and scapulae, which refer to the scapulas or shoulder blades. The levator scapulae muscles elevate the shoulder blades and tilt the head from side to side. They also work with other muscles to stabilize the spine.
The levator scapulae muscles originate from the cervical vertebrae one through four (C1 to C4) and attach to the inside top edge of the scapula. They participate in side bending, called lateral flexion, and rotation, or twisting.
Levator scapulae syndrome (LSS) is a condition characterised by pain, stiffness, and discomfort in the levator scapulae muscle. It is often associated with prolonged sitting, especially with poor posture, and is common among office workers. LSS can cause restricted cervical flexion and side flexion, and the pain may radiate to the neck, shoulder, and rarely, the arm. Treatment for LSS includes physical therapy, manual therapy, and electrotherapy techniques, as well as lifestyle modifications.
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The transversospinalis muscles help move the head forward and backward
The neck is a complex structure of bones, muscles, nerves, blood vessels, lymphatics, and other connective tissues. Neck muscles support the head and help with a range of movements, including chewing, swallowing, and breathing. They also assist in scanning our surroundings and interacting with our environment.
The transversospinalis muscles are a deep group of back muscles that help move the head forward and backward. They also enable head tilting from side to side and stabilize the spine. These muscles include the semispinalis, multifidus, and rotatores, with the latter being the deepest muscles in the group. The semispinalis muscles have the longest fascicles, spanning six segments, while the rotatores muscles have the shortest fascicles, spanning one to two segments.
The transversospinalis muscles group runs obliquely and medially from the transverse process of the vertebra below to the spinous process. The semispinalis muscles, in particular, attach to the thoracic, cervical, and occipital bones, crossing between four and six vertebrae. The multifidus muscle, on the other hand, lies deep to the semispinalis and spans the entire length of the vertebral column, with significant development in the lumbar region.
The rotatores muscle lies deep to the multifidus and is most developed in the thoracic region. It consists of two parts: the long rotatores and the short rotatores. The long rotatores pass from the transverse process medially to the spinous process, crossing two vertebrae. Meanwhile, the short rotatores pass from the transverse process and insert at the base of the spinous process of the vertebrae above the origin.
In summary, the transversospinalis muscles play a crucial role in enabling forward and backward head movements, neck extension, and spinal stability. They work in conjunction with other neck muscles to facilitate various head and neck movements and support essential functions such as chewing, swallowing, and breathing.
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Frequently asked questions
There are several muscles that contribute to the extension of the neck. These include the suboccipital muscles, the transversospinalis muscles, and the trapezius muscle.
The suboccipital muscles are a group of four pairs of small muscles that connect the top of the cervical spine with the base of the skull. They are essential for head extension and rotation.
The trapezius muscle is a large muscle that spans from the base of the skull down the spine to the middle back and out to the shoulder blade. It helps extend the head upward and neck backward, rotate the head, and lift or depress the shoulder blade.
