What Is a Straight Leg Raise?
A Straight Leg Raise is a physical examination test that checks how symptoms respond when a person’s straightened leg is lifted. The movement gently stretches the sciatic nerve and related tissues. Clinicians use the response, including pain location and movement limits, to assess possible nerve irritation linked to lower back conditions.
Quick Facts About Straight Leg Raise
Category
Physical examination test
Used for
Checking possible nerve irritation
Common confusion
Not simply a flexibility test
Also called
Lasègue Test, SLR Test
Often discussed with
Sciatica Treatment
Key Takeaways About Straight Leg Raise
- The knee stays straight during the leg lift.
- Pain location matters more than leg height alone.
- The test is not the same as a hamstring stretch.
How Straight Leg Raise Works
Straight Leg Raise begins with the person lying on their back. The examiner lifts a straightened leg while watching for pain, tingling, numbness, or pulling. The examiner also notes where symptoms appear and whether they travel below the knee.
Related glossary terms: Lumbar Radiculopathy, Sciatic Nerve, Nerve Flossing.
The movement places gentle tension along the sciatic nerve and nearby tissues. Symptoms that reach down the leg may suggest nerve involvement, while tightness in the back of the thigh may point toward muscle or flexibility limits. The test does not identify a cause by itself, so clinicians compare the response with other examination findings.
What the response can show
- Back or leg symptoms during the lift.
- Changes in symptoms when the ankle position changes.
- Differences between the left and right sides.
From the Advanced Injury Care Clinic team
When we assess sciatica, we use the Straight Leg Raise alongside the person’s symptom history and neurological findings. We track where symptoms begin, where they travel, and how the response compares between sides. This helps our team decide which findings need closer attention during the examination.
Straight Leg Raise in Practice: A Real-World Example
A person with lower back pain may report shooting pain down the leg when the straightened leg is lifted. During Sciatica Treatment, that response helps guide the broader examination and treatment plan.
Related Services
Related Terms
Lumbar Radiculopathy
Lumbar Radiculopathy is a condition in which a nerve root in the lower spine becomes irritated…
Sciatic Nerve
The sciatic nerve is the body’s largest nerve, formed by nerve roots in the lower spine…
Nerve Flossing
Nerve Flossing is a gentle movement method that helps a nerve and nearby tissues move more…
Neurological Exam
A Neurological Exam is a clinical assessment of nerve and brain function. It checks sensation, muscle…
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