Long plantar ligament

Last revised by Joachim Feger on 8 Dec 2021

The long plantar ligament is one of the inferolateral stabilizers of the calcaneocuboid joint and a stabilizer of the midtarsal (Chopart) joint.

The long plantar ligament features a form of an hourglass with a distal deep insertion at the cuboid bone and variably, more superficial insertions at the bases of the 2nd to 4th or 5th metatarsals, covering the peroneus longus tendon tunnel 1-3.

The broad proximal origin of the long plantar ligament arises from the inferior or plantar aspect of the calcaneus, just proximal to the origin of the short plantar ligament.

The distal insertions are the cuboid ridge and variably fan-shaped attachments to the 2nd to 4th or 5th metatarsal bases 1-3.

Variations of the long plantar ligament include different attachments to the metatarsal bases and the peroneus longus tendon sheath 1,3.

Similar to the short plantar ligament, the long plantar ligament features a relative homogeneous appearance and is well visualized on all planes 1-3.

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Cases and figures

  • Figure 1: ankle and foot ligaments (Gray's illustrations)
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  • Figure 2: plantar ligaments of the foot (Gray's illustration)
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