The human neck contains numerous tendons, connecting the many muscles of the cervical region to the skull, spine, collarbone, and shoulder blade. People sometimes assume the neck is all soft tissue and vertebrae, but it houses over two dozen muscles on each side, and wherever a muscle attaches to bone, a tendon is involved. Some of these tendons are short and broad, blending almost imperceptibly into the muscles they serve, while others are surprisingly long and distinct. The neck’s tendons play roles in everything from turning your head to swallowing, and when they become inflamed or injured, they can produce symptoms that mimic far more serious conditions.
Where the Tendons Are
The most prominent tendons in the neck belong to the sternocleidomastoid muscle, the thick rope-like muscle you can see and feel running diagonally from behind each ear down toward the collarbone and breastbone. At its upper end, this muscle narrows into a tendon that attaches to the mastoid process, a bony bump just behind your ear. Anatomical dissections show how variable these tendons can be. One case study documented a rare variant in which a single sternocleidomastoid sent six distinct tendons fanning out along the base of the skull, each separated by a small gap and inserting along the bony ridge at the back of the head called the superior nuchal line.1Anatomy & Cell Biology. Bilateral sternocleidomastoid variant with six distinct insertions along the superior nuchal line That kind of variation is unusual, but it illustrates a key point: tendons in the neck are real, substantial structures with enough individuality to surprise even experienced anatomists.
Beyond the sternocleidomastoid, tendons anchor the scalene muscles along the sides of the neck to the upper ribs, attach the levator scapulae to the shoulder blade, and connect the small suboccipital muscles at the base of the skull to the upper cervical vertebrae. The platysma, a thin sheet-like muscle just under the skin of the neck, is one of the few neck muscles that does not terminate in a traditional tendon, instead blending into the facial tissue above and the chest below. But as a general rule, if you can name a neck muscle, it has at least one tendon at one end.
The Digastric Muscle and Its Unusual Middle Tendon
Not all tendons sit at the end of a muscle. The digastric muscle, which runs under the jaw and plays a role in opening the mouth and swallowing, has two fleshy sections connected by a tendon in the middle, sometimes called an intermediate tendon. This arrangement is unusual enough to attract ongoing debate among anatomists. A recent review explored whether this intermediate tendon functions as a kind of pulley system, redirecting the force generated by the muscle’s two bellies around the hyoid bone in the throat.2PubMed Central. The trochlea for the intermediate tendon of the digastric muscle: a review If it does function this way, the digastric tendon would be one of the few pulley-like tendon arrangements in the human body outside of the eye socket and the hand.
The digastric’s intermediate tendon also has an interesting developmental story. Histological studies of human fetuses show that most of this tendon originates from the posterior belly of the muscle, appearing as a descending tendon as early as seven weeks of gestation. The front belly of the muscle grows down to meet it, surrounding a knob of dense tissue at the tendon’s end. A nearby muscle called the omohyoid, which also has two bellies and an intermediate tendon, develops its tendon in a completely different way, not forming one until around the fifteenth week, when mechanical bending of the long muscle apparently triggers connective tissue to replace muscle fibers at a stress point.3PubMed. Early fetal development of the intermediate tendon of the human digastricus and omohyoideus muscles: a critical difference in histogenesis Two muscles that look structurally similar in an adult build their middle tendons through entirely different biological processes.
Deep Tendons You Cannot Feel
The tendons most people can palpate in the neck are superficial ones, like the sternocleidomastoid’s tendon behind the ear or the stiff bands along the back of the neck. But some of the most clinically relevant tendons sit deep against the spine, far out of reach of your fingers. The longus colli is a deep flexor muscle that runs along the front of the cervical and upper thoracic vertebrae, helping you nod your head forward. Its upper portion narrows into a tendon that attaches to the front arch of the atlas, the topmost vertebra. You would never know it was there unless something went wrong with it.
The deep fascia of the neck, the layered connective tissue that surrounds and separates structures, adds to the complexity. Cadaveric dissection has revealed that the deep fascia is not a single sheet but a thick, multi-layered structure with as many as eighteen separate sheets of connective tissue in the neck, interspersed with fat.4PubMed Central. The Deep Fascia of the Head and Neck Revisited: Relationship with the Facial Nerve and Implications for Rhytidectomy Tendons pass through and between these fascial layers, which is part of why imaging the neck’s deeper structures can be tricky even with modern technology.
When Neck Tendons Become Painful
The longus colli tendon is the site of a condition that often gets misdiagnosed: acute calcific tendinitis of the longus colli. Calcium hydroxyapatite crystals deposit in the tendon fibers, triggering an inflammatory response that produces severe neck pain, stiffness, difficulty swallowing, and sometimes a low-grade fever.5PubMed Central. Acute Calcific Tendonitis of the Longus Colli The symptom profile can look alarmingly like a retropharyngeal abscess, meningitis, or even a spinal infection, which is why patients sometimes undergo unnecessary invasive procedures before the correct diagnosis is reached.
On imaging, the tell-tale sign is calcium deposits in the tendon along with fluid collection in the prevertebral space, the area in front of the spine behind the throat.6PubMed Central. Acute Longus Colli Calcific Tendinitis: A Rare Cause of Neck Pain Once identified, the condition is treated conservatively with anti-inflammatory medication and usually resolves within a couple of weeks. Researchers have called it rare but possibly underdiagnosed, meaning some people with unexplained acute neck pain and sore throat may have this condition without it ever being identified.7PubMed Central. Case reports about an overlooked cause of neck pain: calcific tendinitis of the longus colli The pathology shows a foreign-body type inflammatory response to the deposited crystals in the tendon fibers.8PubMed Central. Acute longus colli tendinitis and otolaryngology
Calcific tendinitis is better known in the shoulder, where it affects the rotator cuff tendons. The fact that it also occurs in the neck surprises many clinicians, and it underscores that the neck’s tendons are subject to the same kinds of degenerative and inflammatory processes as tendons elsewhere in the body.
Tendons vs. Ligaments in the Neck
A common source of confusion is the difference between tendons and ligaments in the neck, since both are tough bands of connective tissue and both can be felt in similar regions. Tendons connect muscle to bone. Ligaments connect bone to bone. The neck has both. The nuchal ligament, for instance, is a thick elastic band running from the base of the skull down the back of the cervical spine to the seventh cervical vertebra. It has no muscle attached to it and functions purely to support the weight of the head and limit forward flexion. Muscles and their tendons anchor to the nuchal ligament and the vertebrae around it, but the ligament itself is a separate structure.
This distinction matters in injury. Whiplash, for example, can damage ligaments, tendons, joint capsules, discs, and muscles in the neck. The anatomy is so tightly packed that multiple structures are often affected simultaneously, which is part of why pinpointing the exact source of pain after a rear-end collision is so difficult. Clinical evidence supports injury to facet joints, spinal ligaments, intervertebral discs, and neck muscles as potential sources of chronic whiplash symptoms, and the tendons linking those muscles to bone are necessarily involved when the muscles themselves are strained or torn.
Torticollis and the Sternocleidomastoid Tendon
One of the most visible neck tendon-related conditions is torticollis, commonly called wryneck. In its congenital form, a shortened or fibrosed sternocleidomastoid muscle tilts the infant’s head toward the affected side while rotating the chin in the opposite direction. The tightness often involves the tendon and the lower portion of the muscle where it attaches near the collarbone. Physical therapy, stretching, and sometimes surgical release of the muscle and tendon are used to correct the condition. Causes of torticollis range from muscular and skeletal problems to central nervous system and even eye-related issues, but the muscular form involving the sternocleidomastoid and its tendons is the most common in infants.
In adults, torticollis can develop from muscle spasm, sleeping in an awkward position, or cervical dystonia, a neurological condition causing involuntary muscle contractions. The tendons of the sternocleidomastoid and the deeper neck muscles are under constant tension in these cases, and chronic torticollis can lead to tendon thickening and secondary changes in the cervical spine over time.
Forward Head Posture and Tendon Length Changes
If you spend hours looking at a screen with your head pushed forward, the tendons in the back of your neck are not in a neutral position. A biomechanical study using cadaveric specimens measured the changes in muscle-tendon unit length when the head was moved from a neutral upright posture into a forward head posture. The suboccipital muscles at the base of the skull shortened considerably in forward head posture, consistent with the theory that these muscles sustain a strong, sustained contraction when the head juts forward.9Physical Therapy. Cervical Spine Muscle-Tendon Unit Length Differences Between Neutral and Forward Head Postures: Biomechanical Study Using Human Cadaveric Specimens Meanwhile, muscles and tendons on the front of the neck are stretched beyond their resting length.
This matters because sustained shortening or lengthening of a muscle-tendon unit can lead to adaptive changes. Chronically shortened muscles become tight and develop trigger points. Chronically lengthened muscles weaken. The tendons at both ends adapt too, potentially becoming stiffer or developing areas of degeneration. This is one reason why people who spend years with poor posture at a desk develop persistent neck pain that does not resolve simply by sitting up straight for an afternoon. The soft tissues, including the tendons, have remodeled to accommodate the abnormal position.
Neck Tendons Do More Than Move Your Head
Intuitively, you would expect neck muscles and their tendons to have one job: move and stabilize the head. Research suggests the picture is more interesting than that. A study examining muscle activation during running and jumping found that the superficial neck muscles appear to help stabilize the pelvis against the torques generated by the leg muscles, functioning as part of the body’s core rather than acting purely on the head.10PubMed Central. The Human Neck is Part of the Musculoskeletal Core: Cervical Muscles Help Stabilize the Pelvis During Running and Jumping The researchers proposed a division of labor: deep cervical muscles handle the fine-tuning of head position and posture, while the larger superficial muscles and their tendons contribute to whole-body stabilization during movement.
This finding has practical implications. If neck muscles are part of your core, then neck strength and flexibility are not just about avoiding neck pain. They may affect your running efficiency, your balance, and your susceptibility to lower back problems. Athletes who neglect neck conditioning may be leaving part of their core stabilization system undertrained. And people recovering from neck injuries may experience movement problems that seem unrelated to the neck, precisely because the connection between cervical muscles and pelvic stability has been disrupted.
Why People Think the Neck Has No Tendons
The misconception that the neck lacks tendons probably comes from the fact that neck tendons are less visible and less dramatic than tendons elsewhere. You can see the Achilles tendon bulging at the back of the ankle. You can feel the thick tendons of the wrist flexors when you make a fist. The tendons in the neck are mostly buried under layers of muscle, fascia, and skin, and many of them are short, transitioning gradually from muscle to bone without a long, ropy segment in between. The sternocleidomastoid’s tendon behind the ear is about the only one most people can consciously locate by touch.
Anatomy textbooks sometimes contribute to the confusion by emphasizing the muscular and skeletal components of the neck without giving much attention to the tendons as distinct structures. Medical imaging reinforces this bias: an MRI of the neck is usually read for disc herniations, spinal cord compression, or masses, and the tendons are rarely the focus unless a specific pathology like calcific tendinitis is suspected. The result is that even healthcare professionals sometimes think of the neck in terms of muscles, vertebrae, nerves, and blood vessels, with the tendons remaining an afterthought despite being mechanically essential.
Comparative Anatomy and the Giraffe’s Neck
If you want to appreciate just how much work neck tendons can do, consider the giraffe. Its enormously elongated cervical vertebrae require equally modified muscles and tendons to support and move a head that sits at the end of a roughly two-meter neck. Studies of giraffe anatomy describe muscle tendons originating from enlarged transverse processes of the cervical vertebrae, with expanded bellies and tendons that fill the spaces between the long vertebrae and support the weight of the head and neck.11Annals of Anatomy – Anatomischer Anzeiger. Modified neck muscular system of the giraffe (Giraffa camelopardalis) The giraffe also has a massive nuchal ligament, but the tendons of its neck muscles are critical load-bearing structures in their own right. Human neck tendons face a less extreme engineering challenge, but the basic architecture is the same: muscles generate force, and tendons transmit that force to the skeleton.
The human version of this system is compact and efficient. Our heads weigh roughly four to five kilograms, and the tendons anchoring the posterior neck muscles to the skull and spine maintain that load against gravity all day. When you tilt your head forward even slightly, the effective load on those tendons increases substantially due to the lever arm created by the head’s center of gravity moving in front of the spine. This is the biomechanical basis for “text neck” complaints and a reminder that neck tendons, even though you cannot see them, are working hard every waking moment.