What Is a Straight Leg Raise?
Straight Leg Raise is a clinical examination used to assess how the lower back and sciatic nerve respond when a person raises a straightened leg. A clinician observes symptoms, movement, and resistance during the maneuver. The finding can help distinguish nerve-related leg symptoms from some muscle or joint conditions.
Quick Facts About Straight Leg Raise
Category
Orthopedic and neurological examination
Used for
Assessing radiating leg symptoms
Common confusion
Often mistaken for a simple hamstring stretch
Also called
Lasègue test, SLR test
Often discussed with
Sciatica Treatment
Key Takeaways About Straight Leg Raise
- The knee stays straight during the maneuver.
- Symptoms and movement provide clinical clues.
- It is not the same as a hamstring stretch.
How Straight Leg Raise Works
Straight Leg Raise works by placing controlled tension through the lower back, pelvis, and sciatic nerve pathway as the leg rises with the knee extended. A clinician watches for the location and quality of symptoms, along with changes in movement or muscle tension. Symptoms that travel below the hip may carry different meaning from tightness felt only in the back of the thigh.
Related glossary terms: Sciatic Nerve, Lumbar Spine, Nerve Root.
The maneuver may be performed with the person lying on the back. The clinician raises the leg gradually and compares the response between sides when appropriate. A result is interpreted with the health history and other examination findings, including the lumbar spine and sciatic nerve. The test is one part of an examination, not a stand-alone diagnosis.
From the Arrowhead Clinic Chiropractor team
When we assess sciatica, we observe how symptoms change during a Straight Leg Raise and compare that response with other examination findings. We also consider whether the reported symptoms follow a nerve pattern or reflect local muscle tension. This helps us shape the clinical assessment without treating one maneuver as a complete answer.
Straight Leg Raise in Practice: A Real-World Example
A person with low-back pain and symptoms extending into the leg may have a Straight Leg Raise during a sciatica evaluation. The clinician notes where symptoms appear and how the response relates to other findings before planning care.
Related Services
Related Terms
Sciatic Nerve
The sciatic nerve is the body’s largest peripheral nerve, formed by nerve roots in the lower…
Lumbar Spine
The lumbar spine is the lower section of the vertebral column between the thoracic spine and…
Nerve Root
Nerve Root is a bundle of nerve fibers that branches from the spinal cord through an…
Range Of Motion
Range Of Motion is the available movement at a joint, measured by how far a body…
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