In the Feiss Line, which anatomical landmarks are marked?

The Feiss Line is an important clinical measurement used to evaluate the position of the medial longitudinal arch of the foot. It is drawn from the medial malleolus (the bony prominence on the inner side of the ankle) to the plantar aspect of the first metatarsophalangeal (MTP) joint. The navicular tuberosity, located near the middle of the foot, acts as a reference point and can indicate the height of the arch when assessed in relation to the line drawn.

When the foot is properly positioned, the navicular tuberosity should ideally lie on or just above the Feiss Line. If it drops significantly below this line, it may indicate a flatfoot condition or reduced arch height, which is clinically significant.

The chosen answer accurately outlines these key anatomical landmarks involved in establishing the Feiss Line, allowing for assessment of the arch's integrity. This is critical in both diagnosis and treatment planning for foot and ankle conditions.