What type of motion is utilized in the Gaenslen's Test?

• A. Flexion and extension of the knee
• B. Lateral rotation of the hip
• C. Contralateral leg extension while flexing the other leg
• D. Abduction of the hip

Answer: (C)

Gaenslen's Test is designed to assess for pathology in the sacroiliac joint and involves specific leg movements that place stress on the joint, helping to identify issues. The test requires the patient to lie supine while one leg is flexed at the hip and knee, and the contralateral leg is extended off the table. This position creates tension and assesses for pain or discomfort in the sacroiliac region, allowing the examiner to evaluate for dysfunction or inflammation in that area.

The motion of extension in the contralateral leg while flexing the other leg is critical in stressing the sacroiliac joint, which is why this choice is correct. In contrast, the other options do not accurately represent the combination of movements involved in Gaenslen's Test, which is distinctively characterized by this specific flexion and extension pattern. This particular movement helps in reproducing symptoms that are relevant to the assessment of sacroiliac joint pathology.