What is the purpose of a Well Leg Raise in physical assessment?

• A. To assess for lumbar stability
• B. To identify hamstring injuries
• C. To evaluate potential disc herniation
• D. To measure range of motion

Answer: (C)

The Well Leg Raise is specifically utilized in physical assessment to evaluate potential disc herniation, particularly in the lumbar region. This test is performed by raising the unaffected leg while the patient is lying supine. If raising the well leg causes pain or discomfort radiating down the leg, it suggests that there may be an issue with a lumbar disc, such as herniation, that is affecting the nerve root associated with the affected side. This phenomenon is known as the "crossed straight leg raise" sign, and it is indicative of nerve root irritation or compression due to a herniated disc.

In contrast, while lumbar stability assessments might involve similar leg moves, they do not specifically focus on the identification of intervertebral disc issues. Assessment of hamstring injuries would typically involve other specific tests related to the strength and flexibility of the hamstrings, rather than the position of the legs in this manner. Similarly, measuring range of motion pertains to joint flexibility and is not the primary focus of the Well Leg Raise, which is diagnostic in nature rather than a measurement of overall mobility.