How can a positive result be determined in a straight leg raise test?

• A. By hip flexion beyond 70 degrees
• B. Reproduction of symptoms at less than 40 degrees of hip flexion
• C. Symptoms in the foot only
• D. Pain only when the leg is extended

Answer: (B)

A positive result in a straight leg raise test is indicated by the reproduction of symptoms at less than 40 degrees of hip flexion. This phenomenon is often associated with nerve root irritation, which may suggest the presence of lumbar disc herniation or other conditions affecting the lumbar spine and lower extremities.

When the leg is raised and symptoms are elicited at this specific angle, it points to potential radicular pain, whereby the neurodynamic structures are stressed, suggesting a pathological condition. In contrast, hip flexion beyond 70 degrees would typically not yield a positive result because it does not specifically indicate nerve root involvement or pathology; rather, it suggests a greater ability to move without symptoms. Similarly, if symptoms are confined only to the foot without corresponding back or leg pain, or if pain only occurs when the leg is extended, these would not align with the thresholds and presentations typically assessed during this test to qualify it as positive for lumbar radiculopathy.