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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.
Accessory bones of the ankle. [13]Accessory bones at the ankle mainly include: Os subtibiale, with a prevalence of approximately 1%. [14] It is a secondary ossification center of the distal tibia that appears during the first year of life, and which in most people fuses with the shaft at approximately 15 years in females and approximately 17 years in males.
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 trochlear calcanei, 7 = os in sinus tarsi, 8 = os sustentaculum tali, 9 ...
In the human body, the tarsus (pl.: tarsi) is a cluster of seven articulating bones in each foot situated between the lower end of the tibia and the fibula of the lower leg and the metatarsus. It is made up of the midfoot ( cuboid , medial, intermediate, and lateral cuneiform , and navicular ) and hindfoot ( talus and calcaneus ).
The following terms are used to describe the walls of a cavity: A labyrinth refers to the bony labyrinth and membranous labyrinth, components of the inner ear, due to their fine and complex structure. [17] A sinus refers to a bony cavity, usually within the skull. [18]
A minimally invasive surgical intervention involving a small implant is also available. The implant is inserted into the sinus tarsi and prevents the calcaneus and talus from sliding relative to each other. This prevents the sinus tarsi from collapsing and thus prevents the external symptom of the fallen arch from occurring. [19]