If the mechanical ankle axis is below the anatomical ankle axis, where are the pressures on the leg during dorsiflexion?

When the mechanical ankle axis is positioned below the anatomical ankle axis, it alters the biomechanics during dorsiflexion. In this specific situation, the center of rotation shifts, causing changes in where pressure is applied during movement.

During dorsiflexion, as the foot is brought upward toward the leg, a mechanical axis that is lower than the anatomical axis results in the weight being transmitted in a way that increases pressure towards the anterior area of the leg. Since the mechanical ankle axis is below the anatomical position, the line of action for forces acts more toward the proximal region in the anterior section.

This leads to an increase in pressure being felt on the anterio-proximal region of the leg, as that's where the majority of the load and the resultant forces are concentrated during this specific motion. The biomechanical shift influences the distribution of pressures through the foot and ankle complex, highlighting the importance of understanding mechanical alignments during orthotic and prosthetic assessments.