Neurogenic claudication

What it means

Neurogenic claudication is a specific pattern of leg symptoms — pain, heaviness, tingling, or weakness, usually in both legs — that's triggered or worsened by standing upright or walking, and relieved by sitting down or leaning forward. "Neurogenic" means the cause is the nerves rather than the blood vessels, and "claudication" simply refers to this pattern of symptoms that comes and goes with activity and position. It's caused by narrowing of the spinal canal in the lower back, which crowds the bundle of nerves running through it.

Why it appears on a CT or MRI report

The term itself describes a clinical symptom pattern rather than something a radiologist sees directly on a scan, so it typically appears in a report's clinical history section, written by the referring doctor to explain why the imaging was ordered. What the scan does show is the underlying cause: narrowing of the spinal canal (spinal stenosis), often from a combination of bulging discs, thickened ligaments, and enlarged facet joints crowding the space where the nerves travel. The report will describe the degree of narrowing at each level and whether it's central (affecting the main canal) or affecting the smaller side openings where individual nerve roots exit.

What it usually means

Neurogenic claudication is the hallmark symptom of lumbar spinal stenosis, a narrowing that develops gradually, most often from age-related degenerative changes in the discs, joints, and ligaments of the lower spine. The classic story is that walking or standing for a while brings on aching, heaviness, or numbness spreading down the legs, and bending forward — leaning on a shopping cart, sitting down, or hunching over — reliably brings relief within minutes, because that posture opens more room in the narrowed canal. This is the main clue doctors use to tell it apart from vascular claudication, leg pain from narrowed arteries, which also worsens with walking but is not reliably relieved by bending forward, and instead eases with standing still. For milder symptoms, physical therapy, activity modification, and sometimes injections are the first steps. When symptoms are significant or not improving, surgery to widen the narrowed canal is a well-established, generally effective option.

When to follow up

See a doctor if you have the characteristic pattern of leg pain or heaviness with walking that improves with sitting or bending forward, especially if it's limiting your activity. They can examine you, distinguish it from vascular causes, and decide whether imaging or a referral to a spine specialist makes sense. Seek prompt medical attention for new weakness in the legs, numbness in the groin or inner thighs, or loss of bladder or bowel control, which can indicate more significant nerve compression needing urgent evaluation.

A plain-language way to picture it

Picture a bundle of wires running through a flexible tube that narrows at one spot, like a kink partway along a garden hose. When the hose is straightened out — the position your spine takes when you stand fully upright — the kink squeezes the wires inside a bit more. Bend that section of hose the other way, the way you do when you lean forward or sit, and the kink opens back up, giving the wires more room again. That's essentially what's happening in the spinal canal, and it's why position, not just distance walked, changes how the legs feel.