Medioplantar oblique ligament
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The medioplantar oblique ligament connects the calcaneal coronoid fossa to the navicular bone and runs plantar in relation to the superomedial portion of the calcaneonavicular ligament and inferior to the talar head 1,2.
The medioplantar oblique ligament originates from the coronoid fossa of the calcaneus medial to the origin of the inferoplantar longitudinal ligament 1.
The distal insertion is located at the medial inferior aspect of the navicular bone 1.
The medioplantar oblique ligament is inconsistently visualized on ultrasound but can be seen on MRI 2,3.
On MRI the medioplantar oblique ligament is best visualized on axial planes lateral to the inferoplantar longitudinal ligament and normally shows a striated appearance 2.