Ligament supporting the head of talus –
**Core Concept**
The ligaments surrounding the talus bone play a crucial role in maintaining the stability of the ankle joint. The ligaments provide support to the head of the talus, which articulates with the tibia and fibula.
**Why the Correct Answer is Right**
The correct ligament supporting the head of the talus is the **Deltoid Ligament**. The deltoid ligament is a strong, fan-shaped ligament that consists of two layers: the superficial layer and the deep layer. The superficial layer is further divided into four bands: the tibionavicular, tibiocalcaneal, anterior tibiotalar, and posterior tibiotalar bands. The deltoid ligament provides medial support to the talus, preventing excessive inversion and stabilizing the ankle joint during weight-bearing activities.
**Why Each Wrong Option is Incorrect**
* **Option A:** The **Anterior Talofibular Ligament** (ATFL) is a ligament that connects the talus to the fibula, providing support to the anterior aspect of the ankle joint. However, it does not support the head of the talus.
* **Option B:** The **Posterior Talofibular Ligament** (PTFL) is a ligament that connects the talus to the fibula, providing support to the posterior aspect of the ankle joint. Like the ATFL, it does not support the head of the talus.
* **Option C:** The **Calcaneofibular Ligament** is a ligament that connects the calcaneus to the fibula, providing support to the lateral aspect of the ankle joint. It does not support the head of the talus.
**Clinical Pearl / High-Yield Fact**
The deltoid ligament is often injured in severe ankle sprains, particularly in cases of medial ankle instability. A thorough understanding of the anatomy and function of the deltoid ligament is essential for diagnosing and managing ankle injuries.
**Correct Answer: C. Posterior Talofibular Ligament**