Spine Lumbo-Sacral Spine Evidence: confirmed

Lasegue Test (Straight Leg Raise) Special Test

Orthopedic Physical Examination & Clinical Assessment Guide

Lasegue Test (Straight Leg Raise) Orthopedic Special Test

What is it used for?

  • Diagnosing Sciatica or Lumbar Disc Herniation (specifically L4-S1 nerve roots).

How to Perform

  • Position: Patient lies supine with legs straight.
  • Action: Examiner slowly lifts the patient's straight leg by the heel until pain is felt.

Interpretation of Results

  • Positive Test: Shooting pain down the leg (past the knee) between 30° and 70° of elevation.
  • Why: At this angle, the sciatic nerve is fully stretched. Pain beyond 70° is typically due to tight hamstrings or SI joint issues, not the nerve.

Diagnostic Accuracy

  • Sensitivity: 91%
  • Specificity: 29%

References

  • Magee, D. J. Orthopedic Physical Assessment.