Plantar calcaneonavicular ligament

A key ligament that supports the medial aspect of the foot's arch.

The plantar calcaneonavicular ligament, also known as the spring ligament, is a thick, fibrous band connecting the calcaneus (heel bone) to the navicular bone in the foot. This ligament plays a significant role in maintaining the arch of the foot and supports the weight of the body during walking and running.

Terminologia Anatomica

ligamentum calcaneonaviculare plantare

System

Musculoskeletal system

Function

The primary function of the plantar calcaneonavicular ligament is to provide support and stability to the medial longitudinal arch of the foot. By connecting the calcaneus to the navicular bone, the ligament helps to distribute weight and prevents excessive flattening of the arch during activities such as walking and running. This structure also absorbs shock and facilitates the foot's ability to adapt to various surfaces, contributing to overall balance. In addition to its supportive role, the ligament also plays a part in the biomechanics of the foot, allowing for proper motion and function during locomotion. A healthy and intact spring ligament is crucial for optimal foot performance and can impact gait and posture if injured or weakened.

Location

The plantar calcaneonavicular ligament is located on the underside (plantar aspect) of the foot. It spans from the sustentaculum tali, a protrusion on the calcaneus, to the tuberosity of the navicular bone. This positioning is crucial as it lies deep within the foot's medial arch and provides essential support to the bones and structures around it. The ligament is positioned adjacent to other important ligaments, tendons, and muscles, which play a part in the overall function and stability of the foot. Its anatomical location makes it susceptible to stress, particularly in individuals who engage in high-impact activities or who have anatomical foot variations.

Did You Know?

The plantar calcaneonavicular ligament is referred to as the 'spring ligament' due to its crucial role in supporting the foot's arch and absorbing shock while walking.
Injury to this ligament can lead to flat feet and other foot-related issues, which can affect a person's balance and gait.
The strength and integrity of the plantar calcaneonavicular ligament are essential for athletes and active individuals as it allows for proper foot function during running and jumping.
Stretching or strengthening exercises for the foot can help maintain the health of the plantar calcaneonavicular ligament and prevent injuries.