Long plantar ligament

Anatomical structure in the human foot

Diagram of the long plantar ligament (labeled as "long calcaneocuboid ligament").

The long plantar ligament is a significant ligament located in the foot. It plays a crucial role in maintaining the arch of the foot and providing stability to the foot during movement.

Anatomy

The long plantar ligament originates from the calcaneus, which is the large bone forming the heel. It extends forward to attach to the cuboid bone and the bases of the second, third, and fourth metatarsal bones. This ligament is the longest of the ligaments connecting the calcaneus to the metatarsals.

Function

The primary function of the long plantar ligament is to support the longitudinal arch of the foot. It helps in maintaining the structural integrity of the foot during weight-bearing activities such as walking and running. By stabilizing the cuboid bone, it also assists in the proper functioning of the peroneus longus muscle, which runs along the outer side of the leg and foot.

Clinical Significance

Injuries to the long plantar ligament can lead to foot pain and instability. Conditions such as plantar fasciitis or flat feet may involve dysfunction of this ligament. Treatment often involves rest, physical therapy, and in some cases, surgical intervention.

Related pages

• Foot anatomy
• Ligament
• Plantar fascia
• Arch of the foot