Uncovertebral arthrosis

What it means

Tucked along the side edges of the neck's vertebrae, from roughly the third to the seventh cervical level, are small joint-like structures called uncovertebral joints (sometimes called the joints of Luschka). They aren't present anywhere else in the spine. These structures help guide and limit side-to-side and rotational movement of the neck. Arthrosis simply means wear-related degeneration, so uncovertebral arthrosis describes these small joints thickening, developing bony spurs, and losing their smooth surfaces as part of ordinary aging.

Why it appears on a CT or MRI report

Because the uncovertebral joints sit right next to the neural foramina, the side-openings where nerve roots exit the neck, radiologists pay close attention to whether bony overgrowth here is crowding that space. Reports typically name the level involved (for example C5-C6), describe the joints as showing hypertrophy (thickening) or spurring, and note whether the changes are contributing to foraminal narrowing on one or both sides. This finding is almost always grouped with other signs of cervical spondylosis, the broader term for age-related wear in the neck.

What it usually means

Uncovertebral arthrosis is a normal part of neck aging and becomes increasingly common from middle age onward; many people have it on imaging without ever noticing a symptom. It matters most when the bony overgrowth encroaches on the nerve root's exit space, which can produce neck stiffness, a reduced range of motion when turning the head, or, if a nerve root becomes pinched, pain, tingling, or weakness radiating into the shoulder, arm, or hand on the affected side. The imaging finding and the symptoms don't always line up neatly, so doctors weigh the picture together with the exam.

When to follow up

If the report notes mild uncovertebral changes without nerve involvement, there's usually nothing urgent to act on beyond general neck care — gentle mobility work, posture habits, and staying active. Talk to your doctor if you have arm pain, numbness, or tingling that follows a clear path from the neck outward, or a hand or arm that feels weaker than usual. Seek prompt care for new clumsiness in the hands, an unsteady walk, or bladder or bowel changes, which can suggest the spinal cord itself is being affected and need timely evaluation.

A plain-language way to picture it

Imagine two small hinges bolted to the side of each vertebra to keep the neck's turning motion smooth and controlled, the way door hinges keep a door swinging true. With years of use, those hinges can develop a little rust and roughness, and a small bur of extra metal can build up at the edge. The door still swings, maybe a touch stiffer, but if that bur grows enough to nudge into the door frame's opening next to it, it can start rubbing on whatever passes through that gap — which is exactly the nerve root sitting right beside the joint.