What is the subtalar joint responsible for?

The subtalar joint is primarily responsible for the movements of inversion and eversion of the foot. This joint is located between the talus and the calcaneus (heel bone), allowing for the foot to rotate inwards (inversion) and outwards (eversion). These movements are crucial for activities such as walking on uneven surfaces, providing stability to the foot and ankle, and assisting with balance.

Inversion involves lifting the medial border of the foot, while eversion raises the lateral border. This range of motion facilitates shock absorption and adaptation to various terrains, playing a vital role in overall lower extremity function.

The other options pertain to movements mainly associated with the talocrural joint, or ankle joint, rather than the subtalar joint, underscoring the specific role of the subtalar joint in foot mechanics.