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The sinus tarsi located in the hindfoot, it is contained by the calcaneus, talus, talocalcaneonavicular joint, and the bottom of the subtalar joint. [1] There are five ligamentous structures present inside it: the intermediate, medial, and lateral roots of the inferior extensor retinaculum; the cervical ligament, and the interosseous talocalcaneal ligament.
Sinus tarsi syndrome is the clinical disorder of pain and tenderness in the sinus tarsi, which is a lateral tunnel in the foot at the junction of the hindfoot and the midfoot, between the ankle and the heel. [1] [2] Most of the time, sinus tarsi syndrome onsets after ankle sprains, however there can be other causes. [3]
It runs through the sinus tarsi, a canal between the articulations of the two bones. There are four additional ligaments that form weaker connections between the talus and calcaneus. The anterior talocalcaneal ligament (or anterior interosseous ligament) attaches at the neck of the talus on the front and lateral surfaces to the superior calcaneus.
In 1970, LeLièvre from France coined the term "arthroereisis" while describing the insertion of a bone graft into the sinus tarsi, secured with a staple. [4] Subotnick, in 1974, proposed the use of a synthetic silicone implant placed in the sinus tarsi to enhance the proper positioning of the talus with the calcaneus. [4]
Figure to the right shows locations of rare accessory bones of the foot (presence variable from person to person): 1 = os cuneometatarsal I plantare, 2 = os uncinatum, 3 = os sesamoideum tibialis posterior, 4 = os sesamoideum peroneum, 5 = os cuboideum secundarium, 6 = os trochleare calcanei, 7 = os in sinus tarsi, 8 = os sustentaculum tali, 9 ...
The anterior talocalcaneal ligament (anterior calcaneo-astragaloid ligament or anterior interosseous ligament) is a ligament in the foot.. The anterior talocalcaneal ligament extends from the front and lateral surface of the neck of the talus to the sinus tarsi of the calcaneus.
The groove runs obliquely forward and lateralward, becoming gradually broader and deeper in front: in the articulated foot it lies above a similar groove upon the upper surface of the calcaneus, and forms, with it, a canal (sinus tarsi) filled up in the fresh state by the interosseous talocalcaneal ligament.
Tarsal coalition is an abnormal connecting bridge of tissue between two normally-separate tarsal (foot) bones, and is considered a sort of birth defect.The term 'coalition' means a coming together of two or more entities to merge into one mass (in the case of bones, see synostosis). [1]