Long plantar ligament
The long plantar ligament is located in the base of the foot. It is the lengthiest ligament associated with bones in the foot. This ligament, in addition to other major ligaments that reinforce the foot, include the plantar calcaneonavicular ligament, and the plantar calcacaenocuboid ligament assist the foot's arch. The long plantar ligament extends from the calcaneum or the heel bone to the cuboid, which is on the outside of the foot. Plantar fasciitis is sometimes called a heel spur and is associated with the long plantar ligament. The injury can be the result of a physical activity, which pulls or stretches the ligament, such as kicking or jumping. Patients usually experience pain in the arch of the foot. Ice is traditionally used to reduce the inflammation, and the arch may be taped up to support the arch which affects the long plantar ligament. When the heel is affected instead of the arch, that area of the food may be injected with steroid medication. Doctors advise that weight on the arch is limited after an injury.
Written and medically reviewed by the Healthline Editorial Team
In Depth: Long plantar ligament