Long plantar ligament

This ligament plays a crucial role in maintaining the arch of the foot.

The long plantar ligament is one of the major ligaments located in the foot, connecting the calcaneus (heel bone) to the bases of the metatarsal bones. It is the longest ligament in the plantar aspect of the foot and contributes significantly to the stability of the foot’s arch. The ligament is composed of dense, fibrous connective tissue, and it is essential for the proper mechanical function of the foot.

Terminologia Anatomica

ligamentum plantare longum

System

Skeletal system

Function

The long plantar ligament primarily supports the longitudinal arch of the foot, acting like a suspension bridge that helps distribute body weight across the foot during movement. This ligament works in conjunction with other structures to provide stability while allowing for flexibility and shock absorption. By maintaining the arch, it helps prevent excessive flattening, which can lead to conditions such as flatfoot and plantar fasciitis. Additionally, it plays a role in facilitating foot dynamics during walking and running, providing the necessary support to help propel the body forward.

Location

The long plantar ligament is situated on the plantar (bottom) surface of the foot. It originates from the plantar surface of the calcaneus and extends forward to attach at the bases of the second to fifth metatarsal bones. It lies deeper than the superficial fascia and is covered by other structures, such as the plantar aponeurosis. This ligament runs along the inner side (medial aspect) of the foot but plays a crucial role in supporting the entire foot structure, ensuring proper alignment and functionality during various physical activities.

Did You Know?

The long plantar ligament aids not only in arch support but also helps protect the underlying structures like tendons and nerves.
In addition to its stabilizing function, the ligament contributes to the foot's elastic properties, allowing it to adapt to changes in terrain.
Strong, well-functioning long plantar ligaments are essential for athletes, particularly in sports that require quick changes of direction or jumping.