What indicates a positive Kemp Test?

• A. Increased range of motion observed
• B. Radiating pain down the posterior aspect of the lower extremity
• C. Absence of pain signals a normal test
• D. Pain localized in the lumbar region only

Answer: (B)

A positive Kemp Test is indicated by radiating pain down the posterior aspect of the lower extremity. This test is primarily used to evaluate for lumbar disc herniation or other issues related to the lumbar spine. During the test, the patient is asked to extend and laterally tilt the spine, which could reproduce symptoms if there is nerve root involvement due to conditions such as a herniated disc.

The presence of radiating pain suggests that the nerve roots may be compressed or irritated, leading to symptoms that follow the dermatomes of the affected nerves. This response is critical for clinicians in assessing the presence of lumbar spine pathologies.

The other choices do not align with the interpretation of a positive test result. For instance, increased range of motion does not imply nerve root involvement and pain confined only to the lumbar region may not indicate a positive test, as it lacks the characteristic radiation that suggests a more serious underlying issue. Similarly, an absence of pain does not confirm a normal test; it simply means that no symptoms were provoked during the assessment. Hence, the presence of radiating pain is the key indicator of a positive Kemp Test.