Logan Steele
The neck is comprised of about 30 muscles that extend from the base of the skull and jaw down to the shoulder blades and collarbone. These muscles are skeletal muscles, meaning they are attached to bones by tendons and are under voluntary control. They are divided into three main categories: anterior (front), lateral (side), and posterior (back). The neck muscles support and stabilise the head, neck, and upper part of the spine, while also facilitating a wide range of movements, including head rotation, swallowing, and breathing. These muscles include the sternocleidomastoid, the suprahyoid, the infrahyoid, and the scalene muscles.
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What You'll Learn
- There are about 30 muscles in the neck, extending from the skull and jaw to the collarbone and shoulder blades
- Neck muscles are skeletal muscles, attached to bones by tendons. They are voluntary, allowing control of movement
- Anterior neck muscles are divided into four regions: superficial, suprahyoid, infrahyoid, and scalene
- Sternocleidomastoid is a large, two-headed muscle, allowing neck flexion and head rotation
- Neck muscle injuries are common and can be caused by trauma, whiplash, or strain
There are about 30 muscles in the neck, extending from the skull and jaw to the collarbone and shoulder blades
The human neck contains about 30 muscles, which extend from the skull and jaw to the collarbone and shoulder blades. These muscles are skeletal muscles, meaning they are attached to bones by tendons. They are also voluntary muscles, which means that we can control their movement. The muscles of the neck are categorised into three main groups: anterior (front), lateral (side) and posterior (back).
The anterior neck muscles are further divided into four distinct regions: superficial, suprahyoid, infrahyoid, and scalene muscles. The superficial muscles are some of the largest in the neck. The suprahyoid muscles move the hyoid bone (located just below the jawline) when we swallow and speak. The infrahyoid muscles are four muscles below the hyoid bone that move the larynx up and down. The scalene muscles help with breathing by moving the first two ribs up and down, and they also help to stabilise the bones in the neck.
The lateral neck muscles control head movements from the base of the skull, allowing us to twist our heads from side to side and tilt the cervical spine. The posterior neck muscles are also involved in head movement, along with maintaining head and neck posture.
The complex network of neck muscles supports the head and enables a wide range of movements that are essential for everyday activities. These muscles facilitate respiration, swallowing, speech, and gaze stabilisation. Keeping the neck muscles strong and healthy is important, and this can be achieved through good posture and paying attention to signals from the body.
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Neck muscles are skeletal muscles, attached to bones by tendons. They are voluntary, allowing control of movement
The neck is comprised of about 30 muscles, which are skeletal muscles attached to bones by tendons. These muscles are voluntary, meaning that we can control their movement. They are responsible for a wide range of movements, including head movement, swallowing, breathing, and making facial expressions.
Neck muscles are divided into three main categories: anterior (front), lateral (side), and posterior (back). The anterior neck muscles, for instance, are further divided into four distinct regions: superficial, suprahyoid, infrahyoid, and scalene muscles. The superficial muscles are some of the largest in the neck and include the platysma, which facilitates facial expressions. The suprahyoid muscles, on the other hand, are responsible for moving the hyoid bone during swallowing and speech.
The lateral neck muscles control head movements from the base of the skull, allowing us to twist our heads from side to side and tilt the cervical spine. The posterior neck muscles include the suboccipitals, a group of four tiny muscles that connect the bottom of the skull to the first and second vertebrae of the neck. These muscles help rotate the head and move it forward and backward.
The neck muscles are part of a complex musculoskeletal system that connects the base of the skull to the torso. They are essential for maintaining stability and mobility in the neck region, contributing to our overall quality of life.
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Anterior neck muscles are divided into four regions: superficial, suprahyoid, infrahyoid, and scalene
The human neck contains about 30 muscles, which support and stabilise the head, neck, and the upper part of the spine. These muscles also help with chewing, swallowing, and breathing. The neck muscles are skeletal muscles, meaning they are attached to bones by tendons. They are also voluntary muscles, so we control how they move and work.
The anterior neck muscles are divided into four regions: superficial, suprahyoid, infrahyoid, and scalene. The superficial muscles are some of the largest muscles in the neck. These include the platysma and sternocleidomastoid. The platysma is a sheet-like muscle that lies within the subcutaneous tissue of the anterior neck. It originates from the skin and fascia overlying the region of the clavicle and passes superiorly along the neck. The sternocleidomastoid is a large, two-headed muscle of the neck. Its clavicular head originates from the medial third of the clavicle, while its sternal head arises from the manubrium of the sternum.
The suprahyoid muscles are four muscles located superior to the hyoid bone. They move the hyoid bone when we swallow and speak. These muscles include the digastric, mylohyoid, geniohyoid, and stylohyoid. The digastric muscle is a small muscle situated below the mandible, that extends from the mastoid process of the temporal bone to the chin. The stylohyoid muscle elevates the hyoid bone and retracts the tongue, facilitating deglutition by pushing the food bolus towards the soft palate.
The infrahyoid muscles are four muscles located inferior to the hyoid bone, that connect it to the larynx, sternum, and scapula. These muscles move the larynx (voice box) up and down. They include the sternohyoid, omohyoid, sternothyroid, and thyrohyoid. The sternohyoid is a strap-like muscle found in the muscular triangle of the neck. The omohyoid is a narrow muscle that connects the scapula to the hyoid bone.
The scalene muscles move the first two ribs up and down so we can inhale air when breathing. They also help move the head and stabilise the bones in the neck (cervical spine).
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Sternocleidomastoid is a large, two-headed muscle, allowing neck flexion and head rotation
The neck is a complex musculoskeletal system, consisting of around 30 muscles that support and stabilise the head, neck, and upper spine. These muscles enable a wide range of movements, including head rotation and neck flexion.
One of the most prominent muscles in the neck is the sternocleidomastoid, a large, two-headed muscle that plays a crucial role in neck movement. The sternocleidomastoid originates from two points: the medial third of the clavicle (collarbone) and the manubrium of the sternum (breastbone). From these origins, the muscle fibres ascend diagonally and converge onto the mastoid process of the temporal bone, located behind the ear.
The function of the sternocleidomastoid muscle depends on whether it acts alone or in conjunction with its counterpart on the other side of the neck. When the muscle contracts unilaterally, it produces lateral flexion of the neck on the same side and lateral rotation of the head to the opposite side. In other words, it allows you to tilt your head to the side and rotate it in the opposite direction.
Additionally, when the sternocleidomastoid muscle contracts bilaterally, it results in flexion of the neck, drawing the head towards the chest. This movement is essential for various activities, such as looking down or bending the neck forward. The muscle also assists in expanding the thoracic cavity during forced inspiration, which is crucial for breathing.
The sternocleidomastoid is innervated by the accessory nerve (CN XI) and receives additional innervation from the anterior rami of spinal nerves C2 and C3. This muscle is an essential component of the neck's musculoskeletal system, facilitating neck flexion and head rotation, while also contributing to respiratory functions.
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Neck muscle injuries are common and can be caused by trauma, whiplash, or strain
The neck is a complex musculoskeletal system that connects the base of the skull to the torso. It contains about 30 muscles that allow for a variety of movements and support the head and upper back. Neck muscle injuries are common and can be caused by trauma, whiplash, or strain.
Whiplash is a neck injury caused by a sudden force or movement that strains the neck and spine, damaging bones, muscles, ligaments, and nerves. It commonly occurs in motor vehicle crashes but can also happen in other situations, such as sports injuries. Whiplash can cause a range of symptoms, including pain, muscle spasms, bruising, swelling, and neurological issues such as muscle weakness and numbness.
Neck strains can occur when the neck muscles or tendons are stretched too far, resulting in small tears. Poor posture, repetitive movements, and overexertion can lead to neck strains. For example, activities such as hunching over a computer for extended periods, holding a phone between the ear and shoulder, or looking down at a phone or device frequently can strain the neck muscles. Additionally, lifting heavy objects or engaging in strenuous activities without proper preparation can also cause neck strains.
The symptoms of a neck strain can vary in intensity and may include pain, stiffness, swelling, and discomfort. In most cases, neck strains heal gradually with time and appropriate treatment, which may include pain relievers, muscle relaxants, and the application of ice packs to reduce inflammation. Maintaining good posture, listening to your body's signals, and seeking medical attention when necessary are important for preventing and managing neck muscle injuries.
It is important to note that while neck muscle injuries are common and often treatable, there may be instances where immediate medical attention is required. Persistent and severe neck pain, especially when accompanied by other symptoms such as radiating pain or numbness in the arms and legs, could indicate a more serious condition. Seeking prompt medical advice and undergoing a comprehensive physical examination are crucial steps in managing neck injuries effectively.
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Frequently asked questions
There are about 30 muscles in your neck that extend from the base of your skull and jaw down to your shoulder blades and collarbone. These muscles are skeletal muscles, meaning they are attached to bones by tendons. They are voluntary muscles, so you control how they move and work. These muscles include the sternocleidomastoid, levator scapulae, suboccipitals, and platysma.
Your neck muscles support and stabilise your head, neck, and the upper part of your spine. They also help you move your head in different directions, chew, swallow, and breathe.
Neck muscle injuries can be very painful and cause stiffness, swelling, and headaches. You may also experience a numb or tingly feeling in your shoulders and down your arm, which could be caused by a pinched nerve in your neck. If you are experiencing any of these symptoms, it is important to seek advice from a healthcare professional.
