Straight Leg Raise Test Explained 🦴 Sciatica & Lumbar Disc Herniation Assessment

🎯 Straight Leg Raise (SLR) Test – Lumbar Radiculopathy / Sciatic Nerve Irritation Assessment 🧠 What Is the Straight Leg Raise Test? The Straight Leg Raise (SLR) Test is a commonly used orthopedic test to assess for: • Lumbar nerve root irritation • Sciatica • Lumbar disc herniation • Neural tension involving the sciatic nerve It is most commonly associated with irritation of the: • L4 • L5 • S1 nerve roots ⸻ 🔍 How the Test Is Performed 1. The patient lies flat on their back (supine position) 2. The examiner keeps the knee straight 3. The leg is slowly lifted upward into hip flexion 4. The clinician monitors for symptom reproduction ⚠️ Positive Test Findings The test may be considered positive if the patient experiences: • Radiating pain down the posterior leg • Sciatic-type symptoms below the knee • Tingling, burning, or numbness • Reproduction of familiar nerve symptoms between approximately 30–70° of hip flexion Pain isolated only to the hamstrings without neural symptoms is less indicative of lumbar radiculopathy. ⸻ 🧠 Why the Test Matters The SLR places tension on: • The sciatic nerve • Lumbosacral nerve roots • Dural tissue A positive response may indicate neural irritation or compression, often associated with lumbar disc pathology. ⸻ 📚 Research Support • The Straight Leg Raise Test is known for having relatively HIGH sensitivity for lumbar disc herniation and nerve root irritation. 📖 Sensitivity: Often reported around 80–97% 📖 Specificity: Often lower, around 26–57% depending on study methodology This means the test is useful for screening and helping rule OUT lumbar radiculopathy when negative, but should be interpreted alongside a full clinical examination. 📚 Example References: • Deville et al. (2000) systematic review • Van der Windt et al. • Majlesi et al. ⸻ ⚠️ Clinical Considerations The SLR should always be interpreted alongside: • Patient history • Neurological findings • Myotomal weakness • Dermatomal symptoms • Reflex testing • Functional limitations Additional testing may include: • Crossed Straight Leg Raise • Slump Test • Lumbar ROM assessment • Neurodynamic testing ⸻ ⚠️ Disclaimer This content is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for evaluation, diagnosis, and treatment. #StraightLegRaise #Sciatica #LumbarRadiculopathy #OrthopedicOccupationalTherapy #ChadGOrthoOT #LowBackPain