About

The talonavicular joint is the central mobility joint of the midfoot, allowing the foot to adapt to uneven surfaces, absorb shock, and transition smoothly through the gait cycle. Talonavicular Joint Excursion describes how much motion occurs between the talus and navicular as load is applied.

This joint plays a key role in controlling the foot’s ability to pronate and supinate. Adequate excursion helps the foot absorb forces during initial contact and midstance, then stiffen appropriately for propulsion. Limited excursion can reduce shock absorption and alter force transfer, while excessive excursion can lead to instability and altered alignment through the foot and ankle.

Assessing this joint’s available movement provides valuable information about midfoot mobility, adaptability, and overall functional foot health.

Effect of Deviation

Reduced excursion may limit shock absorption and cause increased stress on adjacent joints, while excessive excursion can create midfoot instability and contribute to overuse conditions.