What Is a Gliding Joint? Function, Location & Examples

A gliding joint, also called a plane joint, is a type of synovial joint in which two relatively flat bone surfaces slide across each other. Unlike a hinge at the knee or a ball-and-socket at the hip, a gliding joint does not swing through a wide arc or rotate in a deep socket. Instead, it allows short, sliding movements that may look minor on their own but add up to make complex motions like bending your wrist or twisting your torso possible. You have dozens of these joints scattered throughout your skeleton, from the small bones of your wrist and foot to the connections between your vertebrae and your ribs.

How Gliding Joints Move

The defining feature of a gliding joint is that its bone surfaces are roughly flat or only slightly curved, and they slide against each other rather than spinning or bending around an axis. Think of it like two playing cards sliding over one another on a tabletop. The movement at any single gliding joint is small, sometimes only a few millimeters or a few degrees. But because gliding joints rarely work alone, the combined movement of several gliding joints working together gives you significant flexibility in regions like the wrist, the midfoot, or the spine.

Like other synovial joints, a gliding joint has a capsule lined with a membrane that produces synovial fluid. This fluid reduces friction between the sliding surfaces. The bone ends are covered with a thin layer of articular cartilage, and the whole joint is reinforced by ligaments that limit how far the bones can slide. That ligament reinforcement matters because gliding joints have a flat geometry that does not provide much inherent bony stability. Without those ligaments and the surrounding muscles, the joint surfaces could shift too far in any direction.

Gliding Joints in the Wrist and Hand

Your wrist is one of the best places to see gliding joints at work. The wrist contains eight small carpal bones arranged in two rows, and the joints between those bones are classic gliding joints. When you flex, extend, or tilt your wrist side to side, you are not just moving one hinge. You are letting multiple carpal bones slide against each other in a coordinated way. Research on cadaver wrists found that every intercarpal joint contributes to overall wrist motion, but each one’s contribution varies depending on the direction of movement.¹ Some of those small gliding joints matter more for bending forward and backward, while others play a bigger role in side-to-side tilting.

The carpometacarpal joints at the base of the four fingers (excluding the thumb) are also gliding joints. They are much less mobile than the thumb’s carpometacarpal joint, which is a saddle joint with a wider range of motion. But even the small sliding movements at the finger-side carpometacarpal joints help your palm flex slightly to grip objects of different shapes. Without that subtle movement, holding a ball or gripping a wrench would feel much stiffer.

Facet Joints Along the Spine

Each vertebra in your spine connects to the one above and below it through a pair of facet joints, also called zygapophyseal joints. These are gliding joints, and they are arguably the most clinically significant ones in the body because of how often they cause problems. Facet joints have a complex three-dimensional shape that varies from region to region along the spine, and their geometry determines what kinds of movement each section of the spine allows.²

In the lumbar (lower back) region, the facet surfaces tend to be oriented more in a vertical plane that faces inward, which helps resist excessive rotation. That makes sense: your lower back needs to support heavy loads without twisting too freely. In the thoracic (mid-back) region, facet orientation is more in the frontal plane, accommodating the gentle rotation that happens when you turn your upper body. In the cervical (neck) region, the facets are angled to allow a relatively generous range of flexion, extension, and rotation, which is why you can turn your head so freely.

The facet joints work together with the intervertebral discs to share the load. The discs handle most of the compressive force, while the facet joints help guide and constrain motion. When the disc degenerates and loses height, the facet joints get overloaded, accelerating wear and tear. This is a common path to low-back pain in older adults. Technologies designed to preserve spinal motion, including total disc replacement and facet replacement devices, attempt to restore the normal load-sharing relationship rather than fusing the vertebrae together.²

The Shoulder Girdle

Your shoulder gets most of its dramatic range of motion from the glenohumeral joint (the ball-and-socket where the arm bone meets the shoulder blade), but two gliding joints in the region play essential supporting roles. The acromioclavicular joint sits at the top of the shoulder where the collarbone meets a bony projection on the shoulder blade called the acromion. The sternoclavicular joint is where the inner end of the collarbone meets the breastbone. Both allow limited sliding and rotational movements that let your shoulder blade shift position as you raise your arm, reach across your body, or shrug.

These joints contribute fundamentally to overall shoulder function. The scapulothoracic, acromioclavicular, and sternoclavicular joints all work as a coordinated system during arm elevation: the shoulder blade tilts, rotates, and slides along the ribcage, and the clavicle pivots at both ends to accommodate that movement.³ Without the gliding that happens at the acromioclavicular and sternoclavicular joints, you would lose a significant chunk of your overhead reach even if the ball-and-socket itself were perfectly healthy.

Costovertebral Joints and Breathing

Every time you breathe, gliding joints are at work in your ribcage. Each rib attaches to the spine through a costovertebral joint complex, and these connections allow the ribs to glide and rotate as the chest expands and contracts. The costovertebral joint complex serves double duty: it is mechanically involved in both respiratory function and thoracic spine stability.⁴ The gliding motion at these joints is subtle, but it has to happen thousands of times a day every time your lungs inflate and deflate.

Conditions that stiffen the costovertebral joints, such as ankylosing spondylitis, can restrict chest expansion and make breathing feel labored. People with this kind of stiffness often compensate by relying more heavily on the diaphragm and abdominal muscles to breathe, since the ribcage itself cannot expand normally. This is a useful reminder that not all gliding joints are in places you would think of as “joints” in the everyday sense. The ribs do not bend or rotate dramatically, but the small gliding motion at their vertebral attachment is essential.

Gliding Joints in the Foot

The foot has a cluster of gliding joints between the tarsal bones, the irregularly shaped bones that form the midfoot and hindfoot. The intertarsal joints (such as those between the cuboid, navicular, and cuneiform bones) and the tarsometatarsal joints all rely on flat or gently curved articular surfaces that slide against each other. These joints give the foot the ability to adapt to uneven ground, absorb shock during walking, and stiffen into a rigid lever for push-off during a stride.

The sacroiliac joint, where the base of the spine meets the pelvis, also fits loosely into the gliding-joint category, though it is a somewhat unusual example. It has synovial fluid and a capsule, but its surfaces are irregular and interlocking rather than smoothly flat. Mobility at the sacroiliac joint is very limited under normal circumstances, but it increases during pregnancy and the postpartum period to accommodate childbirth.⁵ The joint is subjected to major shear forces because it sits right at the transition point between the weight of the upper body and the legs, which helps explain why sacroiliac dysfunction is a surprisingly common source of lower-back and buttock pain.

The TMJ as a Hybrid Joint

Your jaw joint, the temporomandibular joint, is an interesting case because it combines two different types of movement in the same joint. The TMJ has two compartments separated by an articular disc. In the lower compartment, the movement is primarily a hinge motion (opening and closing the mouth). In the upper compartment, the movement is a translation or gliding motion, where the mandibular condyle and disc slide forward along the base of the skull.⁶ This gliding component is what lets you jut your jaw forward, move it side to side, and open your mouth wide enough for a large bite. Without the gliding in the upper compartment, you could only open and close your mouth in a single plane, like a hinge on a door.

Because the TMJ has this dual nature, problems with the gliding disc can cause the joint to click, pop, or lock. When the disc slips out of position, the smooth gliding in the upper compartment is disrupted. MRI is the imaging method of choice for evaluating these kinds of TMJ problems because it shows the soft-tissue disc clearly and can capture dynamic images of the joint as it opens and closes.⁷

When Gliding Joints Wear Out

Gliding joints are just as susceptible to osteoarthritis as any other synovial joint, and sometimes more so because of the loads they bear. The acromioclavicular joint at the top of the shoulder is a common example. Osteoarthritis there often shows up on imaging in middle-aged and older adults, though the relationship between what the scan shows and what the person actually feels is not always straightforward. Some people have significant arthritic changes on imaging but little pain, while others with seemingly minor changes have considerable discomfort. What is widely accepted, though, is that acromioclavicular osteoarthritis can contribute to rotator cuff impingement by narrowing the space through which the rotator cuff tendons pass.⁸

Facet joint arthritis in the spine follows a similar pattern. Degeneration is extremely common with age and does not always cause symptoms, but when it does, it can produce localized back or neck pain that worsens with extension or twisting. Degenerative changes at gliding joints in the wrist and foot also occur, particularly after injuries. A poorly healed ligament tear between carpal bones, for instance, can allow abnormal sliding and accelerate cartilage wear at the joint surface.

How Gliding Joints Differ from Other Joint Types

Synovial joints are typically classified into six categories based on the shape of their articular surfaces and the movements they allow. The list includes ball-and-socket joints, hinge joints, pivot joints, saddle joints, condyloid (ellipsoid) joints, and gliding joints. What sets gliding joints apart is their simplicity of form. The surfaces are the flattest and least specialized. That means they do not have the deep socket of a hip, the spool shape of an elbow hinge, or the concave-convex pairing of a saddle joint.

This flat geometry also means that gliding joints are harder to classify cleanly than other types. In real anatomy, few joint surfaces are perfectly flat. Most have slight convexities, concavities, or undulations. The facet joints of the spine, for example, are called gliding joints in most textbook classifications, but their surfaces are often curved enough that they have elements of a condyloid joint as well. This blurriness is worth keeping in mind if you are looking at a skeleton or an anatomy model and trying to categorize everything neatly: real joints do not always respect the six-category system.

Joint Mobilization and Physical Therapy

Physical therapists routinely use gliding movements as a treatment technique. Joint mobilization, where a therapist manually applies a small gliding force to a joint’s surfaces, is a standard intervention for restoring range of motion after injury or in conditions like adhesive capsulitis (frozen shoulder). The direction of the applied glide turns out to matter quite a bit. In a study of patients with frozen shoulder, a posteriorly directed glide mobilization of the glenohumeral joint produced a mean improvement of about 31 degrees of external rotation, while an anteriorly directed glide at the same joint produced a mean improvement of only about 3 degrees.⁹

Research on cadaver shoulders has shown that both dorsal (back-to-front) and ventral (front-to-back) translational mobilizations can improve abduction range of motion when applied at the end range of the joint’s available movement.¹⁰ These findings illustrate a broader principle: the gliding that naturally occurs between joint surfaces is not just a passive consequence of movement. It can be deliberately applied or restored as a therapeutic tool. When a joint stiffens, part of what is lost is this normal gliding between surfaces, and manual therapy aims to get it back.

Joint mobilization is not limited to the shoulder. Therapists apply gliding techniques to the wrist’s carpal joints, the small joints of the foot, the facet joints of the spine, and essentially any synovial joint where the normal sliding motion has become restricted. The technique generally involves low-velocity, controlled oscillations or sustained pressure at the joint line. It is gentler than the high-velocity “cracking” maneuvers associated with some forms of manipulation, and it works specifically by restoring the translational (gliding) component of joint motion.

Why So Many Bones and Joints Instead of Fewer

A reasonable question is why the wrist, for example, needs eight separate bones with multiple gliding joints between them rather than just a single hinge. The answer has to do with how the body distributes stress and creates flexibility. A single hinge at the wrist would give you movement in only one plane and concentrate all the bending force at one location. Instead, having many small bones connected by gliding joints lets the wrist bend and tilt in multiple directions while spreading the mechanical load across a larger area. The same logic applies to the midfoot, where a cluster of tarsal bones and their gliding joints lets the foot mold itself to irregular surfaces without putting excessive strain on any single spot.

This design also provides a degree of damage tolerance. If one gliding joint in the wrist stiffens from arthritis or injury, the other intercarpal joints can partially compensate by taking on a slightly larger share of the motion. You lose some total range, but you do not lose all function the way you might if a single large hinge locked up completely. The redundancy built into these multi-joint systems is part of why wrist and foot injuries, while painful and sometimes debilitating, often still allow people to maintain a surprising amount of function even without surgery.

Gliding Joints You Might Not Think About

Beyond the well-known examples in the wrist, spine, and shoulder, gliding joints appear in a few less obvious locations. The joints between the articular processes of the sacrum and the lowest lumbar vertebra are gliding joints that bear an outsized share of the body’s weight during standing and sitting. The joint between the head of the fibula and the lateral condyle of the tibia, just below the outer edge of the knee, is another gliding joint. It does not contribute to the main bending motion of the knee but allows the fibula to shift slightly during ankle movement, which helps accommodate the changing width of the ankle mortise as the foot dorsiflexes and plantarflexes.

Even the small joints between the bodies of the vertebrae and the heads of the ribs, beyond the costovertebral joints already discussed, involve gliding surfaces. The sheer number of these joints throughout the skeleton is easy to underestimate. Most anatomy references list over 30 named gliding joints in the body, and the actual count depends on how you classify the borderline cases. They may not be the most dramatic joints, but collectively they account for a remarkable share of the body’s ability to move, adapt, and absorb force.