Prone Knee Flexion Test for Lumbar Spine
Prone Knee Flexion Test for Lumbar Spine is used to differentiates between lumbar and sacroiliac pain.
- Place the patient in prone position.
- The examiner bends the patient’s knee and tries to bring the heel as far as possible toward the buttocks.
- First the patient should passively give way, but then try to extend the leg against the resistance of the
- Prone Knee Flexion Test for Lumbar Spine is considered positive when there is a feeling of tension first in the sacroiliac joint, then in the lumbosacral junction, and lastly in the lumbar spine.
- This test should be performed when there is suspicion of changes in the pelvic ligaments and intervertebral disks.
- Pain in the sacroiliac joint or in the lumbosacral or lumbar areas without radicular, radiating pain suggests degenerative changes and/or ligament insufficiency.
- Increase in radicular pain indicates intervertebral disk injury.
- Unilateral nerve root pain in the lumbar spine, in the buttock region, and over the posterior thigh suggest L2/L3 nerve root injury.
- During this test the femoral nerve will also be stretched. The occurrence of pain and/or paresthesia in the anterior thigh indicates tight quadriceps, quadriceps lesion, or femoral nerve irritation.
- Clinical Tests for the Musculoskeletal 3rd Ed. Book