Which of the following tendons has attachments on sustenticulum Tali –
**Core Concept**
The sustentaculum tali is a strong, fibrocartilaginous band that connects the medial aspect of the calcaneus to the talus, providing support and stability to the ankle joint. The sustentaculum tali serves as an attachment point for several muscles and tendons.
**Why the Correct Answer is Right**
The flexor hallucis longus tendon attaches to the sustentaculum tali, which allows it to transmit forces from the muscles of the lower leg to the talus. This attachment is crucial for the flexor hallucis longus muscle to function properly, enabling the flexion of the great toe. The sustentaculum tali provides a mechanical advantage, allowing the flexor hallucis longus tendon to exert a greater force on the talus.
**Why Each Wrong Option is Incorrect**
**Option A:** The Achilles tendon does not attach to the sustentaculum tali; instead, it connects the gastrocnemius and soleus muscles to the calcaneus.
**Option B:** The posterior tibial tendon does not attach to the sustentaculum tali; it connects the tibialis posterior muscle to the navicular bone and other bones in the midfoot.
**Option C:** The peroneus longus tendon does not attach to the sustentaculum tali; it connects the peroneus longus muscle to the base of the first metatarsal bone.
**Clinical Pearl / High-Yield Fact**
The sustentaculum tali is a clinically important landmark, as damage to this structure can lead to instability of the ankle joint and pain in the posterior aspect of the ankle.
**Correct Answer: A. Flexor hallucis longus tendon.**