Spondylolisthesis

Spine

Overview

Spondylolisthesis is a condition where one vertebra slips forward (anterolisthesis) or backward (retrolisthesis) relative to an adjacent vertebra, most commonly at the lumbosacral spine. This displacement can result from degenerative changes, isthmic defects, or traumatic injury, and may compress neural structures causing radiculopathy or claudication. Clinical presentation ranges from asymptomatic incidental findings to severe pain with neurological compromise.

Pathophysiology

Spondylolisthesis occurs through multiple mechanisms: isthmic defects (pars interarticularis fractures) compromise vertebral stability; degenerative processes reduce disc height and facet joint integrity; hypermobility and instability develop; nerve root compression occurs as the slipped vertebra narrows the spinal canal and foramina; inflammatory changes and muscle guarding perpetuate symptoms through altered biomechanics and reduced segmental stability.

Patient Education

Understanding your spondylolisthesis severity, maintaining neutral spine posture, avoiding excessive lumbar extension and rotation, and engaging in progressive core stabilization exercises are essential to prevent progression and manage symptoms effectively.

Typical Presentation

Site

Lower lumbar spine (L4-L5 or L5-S1 most common), buttocks, posterior thighs, lower legs with radiation patterns depending on nerve involvement

Quality

Dull aching lower back pain, claudication-like symptoms (pain with walking relieved by flexion), radicular pain with neurological radiation, muscle cramping and fatigue

Intensity

Highly variable from mild occasional pain to severe constant pain; typically worsens throughout the day and with activity

Aggravating

Lumbar extension and rotation, standing for prolonged periods, walking long distances, heavy lifting, sports involving extension (gymnastics, diving), fatiguing activities

Relieving

Lumbar flexion, sitting, lying down, forward bending, rest, core engagement and bracing, anti-inflammatory medications

Associated

Lower limb neurological symptoms (numbness, tingling, weakness), claudication pattern, bilateral symptoms if severe, reduced lumbar lordosis or kyphosis, muscle guarding and spasm, leg length discrepancies, postural dysfunction

Orthopaedic Tests

Test descriptions are written with AI assistance from standard clinical texts. Where a test lists Sources, its description has been checked against them; those sources are independent and do not endorse OsteoKit. Accuracy figures and grades (A–D) appear only when checked against the published study; tests without one are marked “No accuracy study”.

Further reading: full test procedures are described in standard clinical examination texts, e.g. Magee & Manske, Orthopedic Physical Assessment (7th ed.), and Cook & Hegedus, Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd ed.).

No accuracy study

Prone Hip Extension Test (Stork Test / Single-Leg Stance Extension)

Procedure

Patient stands on one leg, lifts the other knee forward, then leans back into lumbar extension. Repeat standing on the other leg.

Positive Finding

Reproduction of the familiar low back pain, often on the side of the standing leg.

Interpretation

Mainly used for suspected pars stress injury (spondylolysis) in young athletes, where it performs poorly. It does not diagnose a spondylolisthesis; a positive result only shows that extension on one leg provokes the pain. Two systematic reviews (Alqarni 2015; Grødahl 2016) found the one-legged extension (stork) test studied only for spondylolysis, where it performed poorly. For spondylolisthesis, palpating for a step between spinous processes was the most useful test in those reviews. No figure is shown for this test here.

Sources

No accuracy study

Straight Leg Raise (SLR) Test

Procedure

Patient supine. Lift each leg in turn with the knee straight until symptoms appear, noting the angle and where the symptoms are felt.

Positive Finding

Reproduction of the familiar radiating leg pain below the knee, or a marked limit of the leg raise.

Interpretation

A positive test suggests nerve-root irritation, which can occur with a slip that narrows the foramen. Tight hamstrings are common in spondylolisthesis, especially in young people, so distinguish a hamstring stretch from nerve pain. The SLR does not assess cauda equina syndrome; ask about bladder, bowel and saddle sensation directly. The SLR tests nerve-root tension. Its published accuracy is for disc herniation, not spondylolisthesis, so no figure is shown here.

Sources

No accuracy study

Neurological Examination (Reflexes, Motor, Sensory)

Procedure

Test strength by myotome (knee extension L3–4, dorsiflexion L4, big-toe extension L5, plantarflexion S1), sensation by dermatome, and the patellar and Achilles reflexes, comparing both sides. Ask about bladder, bowel and saddle sensation.

Positive Finding

Weakness, sensory change or a reduced reflex fitting one nerve root, most often L5 with an L5–S1 slip.

Interpretation

A deficit suggests nerve-root compression at the level of the slip. Progressive weakness, bilateral leg symptoms, saddle numbness or bladder or bowel change need same-day medical assessment.

Sources

No accuracy study

Lumbar Palpation / Step Deformity

Procedure

Patient standing, then prone. Run your fingertips down the lumbar spinous processes and feel for a step or shelf between two levels, most often at L4–L5 or L5–S1.

Positive Finding

A palpable step or ledge between adjacent spinous processes.

Interpretation

A palpable step supports a spondylolisthesis at that level, but small slips often cannot be felt. Standing lateral X-rays confirm the slip and its grade. Leg symptoms, weakness or bladder change need a full neurological examination.

Sources

No accuracy study

Seated Lumbar Flexion Test (Absence of Midline Prominence)

Procedure

Palpate the step with the patient standing, then ask the patient to sit and bend forward, and palpate the same level again.

Positive Finding

The step remains palpable in forward flexion.

Interpretation

A step that persists in flexion fits a true slip of one vertebra on the next, while one that disappears may reflect soft-tissue or postural change. This is a clinical observation, not a validated test; imaging confirms and grades the slip.

Further reading

Not a diagnostic test

Single-Leg Stance Test

Procedure

Ask the patient to stand on one leg for 30 seconds, eyes open, and then repeat on the other side. Note balance, pelvic control and any pain.

Positive Finding

Pain in the low back or buttock, or difficulty keeping balance or a level pelvis on one side.

Interpretation

A functional check of load tolerance and hip control, not a diagnostic test for spondylolisthesis. The Romberg test (standing with feet together, eyes closed) is a different test of position sense and belongs in the neurological examination.

Further reading

⚠ Red Flags

  • •Progressive neurological deficit or cauda equina syndrome (bilateral leg pain, saddle anaesthesia, bowel/bladder dysfunction)
  • •Severe unrelenting pain unresponsive to conservative care
  • •High-grade slippage (>50% displacement) with instability requiring surgical evaluation
  • •Trauma with acute onset and severe pain
  • •Signs of myelopathy (upper limb symptoms, gait disturbance, hyperreflexia)
  • •Fever, unexplained weight loss, immunosuppression (possible infection or malignancy)

⚡ Yellow Flags

  • •High pain catastrophizing or fear-avoidance beliefs limiting activity engagement
  • •Psychosocial distress with depression or anxiety affecting recovery
  • •Excessive reliance on passive interventions without rehabilitation participation
  • •Work-related stress or job dissatisfaction exacerbating symptoms
  • •Unrealistic expectations about surgical intervention or rapid cure
  • •History of trauma or abuse influencing pain perception and recovery

Osteopathic Techniques

Non-operative care comes first: physical therapy for core stabilisation, lumbar flexibility and hamstring stretching, with bracing and activity changes when needed.

Safety: Neurological deficit, progressive deformity or pain that does not respond to conservative care needs surgical review.

Region

Lumbar paraspinals, quadratus lumborum and gluteals

Technique

Soft tissue, lumbar and glutealNo trials found

Rationale

Eases protective muscle tone around the slipped level. Supports core stabilisation work, not a substitute for it.

How it's done, cautions & evidence

How it's done

Hands-on soft-tissue work (kneading, stretching and sustained pressure) to the lumbar paraspinals, quadratus lumborum and gluteal muscles, usually prone or side-lying.

Cautions

Only minor side effects have been reported in trials.

Evidence in Spondylolisthesis

Searched 13 Oct 2026: no trials of soft tissue technique in spondylolisthesis.

Sources

Region

Lumbar spine (flexion-biased, adjacent segments)

Technique

Articulation, lumbarNo trials found

Rationale

Gentle, flexion-biased movement of stiff segments next to the slip. Do not force the unstable level.

How it's done, cautions & evidence

How it's done

Rhythmic, low-velocity movement of restricted lumbar segments within their passive range, with no thrust, usually side-lying or prone. The amplitude can vary.

Cautions

Side effects reported in trials were mild and short-lived: soreness, tiredness or a flare of existing symptoms.

Evidence in Spondylolisthesis

Searched 13 Oct 2026: no trials of lumbar articulation or mobilisation in spondylolisthesis.

Sources

Region

Psoas (hip flexors)

Technique

Muscle energy, psoasNo trials found

Rationale

A tight psoas pulls the lumbar spine into extension, which can load the slipped level. Untested in spondylolisthesis.

How it's done, cautions & evidence

How it's done

The hip is taken into extension to the barrier (prone, or supine with the leg off the table). The patient pulls the hip toward flexion for 3–5 seconds against equal resistance, relaxes, and the hip is taken further into extension. Repeat 3–5 times, then re-check.

Cautions

Do not use with a fracture in the area, an unstable pelvis or hip, recent surgery, or a patient who cannot contract on request or follow directions.

Evidence in Spondylolisthesis

Searched 13 Oct 2026: no trials of psoas muscle energy technique in spondylolisthesis.

Rehabilitation Exercises

Neutral Spine Posture Awareness and Pelvic Tilts

PosturalBeginner

Supine Hip Flexor Stretch (Modified Thomas Test Position)

StretchingBeginner

Supine Hamstring Stretch with Strap

StretchingBeginner

Transverse Abdominis Activation (Supine, Drawing-In Maneuver)

StrengtheningBeginner

Gluteus Maximus Activation (Bridging Progression)

StrengtheningBeginner

Quadruped Alternate Arm-Leg Raise (Bird Dog Progression)

StrengtheningIntermediate

Side-Lying Gluteus Medius Clamshells

StrengtheningBeginner

Lumbar Flexion in Supine (Knees to Chest Stretch)

Range of MotionBeginner

Standing Hip Hinge with Neutral Spine (Deadlift Pattern)

BalanceIntermediate

Prone Back Extension with Neutral Spine (Low Amplitude)

StrengtheningIntermediate

Walking Program with Postural Awareness (Graded Progression)

CardiovascularBeginner

Plank Hold with Neutral Lumbar Spine (Progression from Wall to Floor)

StrengtheningIntermediate

Referral Criteria

  • •Progressive neurological deficits (motor weakness, progressive sensory loss, reflex changes) suggesting nerve root compression or myelopathy
  • •Cauda equina syndrome signs (bilateral symptoms, saddle anaesthesia, bowel/bladder dysfunction) requiring emergency surgical consultation
  • •High-grade spondylolisthesis (>50% slip) with instability or progressive slip angle on imaging
  • •Severe symptoms unresponsive to 6-8 weeks of conservative management combined with significant functional limitation
  • •Acute trauma with spondylolisthesis requiring urgent imaging and surgical evaluation
  • •Symptoms consistent with vascular claudication (pulse changes, skin temperature changes, arterial insufficiency signs)
  • •Red flag findings suggesting infection, malignancy, or systemic disease
  • •Patient requesting surgical consultation for cosmetic correction or performance enhancement
  • •Young patient (child/adolescent) with high-grade slip or rapid progression requiring orthopedic assessment