- sinus tarsi is the depression found on the lateral side of the tarsus and is distal to and on the same level as the lateral malleolus;
- on incision of the structures overlying the sinus tarsi - namely, lateral portion of the inferior extensor retinaculum, interosseous talocalcaneal
ligament and reflection of the extensor digitorum brevis muscle belly distally
- one exposes lateral talocalcaneal, talo- navicular, & calcaneocuboid articulations;
- Sinus Tarsi Syndrome:
- pain and tenderness on the lateral side of the hindfoot originating from the area of the sinus tarsus (talocalcaneal sulcus - a tunnel between
the talus and calcaneus;
- sinus is filled with the interosseous talocalcaneal ligament, which, when injured (usually w/ lateral ankle sprains) or aggravated (w/
inflammatory arthritis) can lead to characteristic pain
Anatomy of ligamentous structures in the tarsal sinus and canal.
Original Text by Clifford R. Wheeless, III, MD.
Last updated by Data Trace Staff on Tuesday, May 15, 2012 2:29 pm