What is the position and angle of the leg when demonstrating the ankle mortise?

When demonstrating the ankle mortise, the correct positioning involves dorsiflexing the foot to a 90-degree angle and applying medial rotation. This positioning is crucial for obtaining an optimal view of the ankle joint, particularly the mortise, which is formed by the tibia, fibula, and the talus. Medial rotation opens up the joint space and provides a clear view of the lateral aspect of the mortise. This positioning allows for better visualization of any potential fractures or abnormalities in that area, which is essential for accurate diagnosis and treatment.

Dorsiflexion at 90 degrees helps align the foot correctly with the X-ray beam, ensuring that the anatomy of interest is fully demonstrated. The medial rotation specifically allows for the mortise view, highlighting the integrity of the ankle joint. Therefore, this method is a standard practice in radiographic imaging of the ankle, allowing practitioners to assess joint functionality effectively.