Are you familiar with cuboid and where it is located? The cuboid is an important small bone on the outside of the foot just in front of the heel bone. It is important as it acts as a pulley for the tendon of the peroneus longus muscle from the outside of the leg. The tendon passes underneath the cuboid bone on its way to the other side of the foot. As it is a pulley, it needs to be very stable. If it does move it can strain the joints around the cuboid. If this does happen, a cuboid manipulation is often needed to put the bone back in its place in order the muscle contracts.