**Question:** MC comp. of # talus is -

A. 1/3 medial
B. 1/3 inferior
C. 1/3 lateral
D. 1/3 superior

**Core Concept:**
The talus, a small triangular bone, is located in the ankle joint and plays a crucial role in supporting the weight of the body and facilitating foot movement. The talus consists of three compartments: medial, lateral, and superior. Each compartment contains specific structures and functions within the joint.

**Why the Correct Answer is Right:**
The correct answer, **D. 1/3 superior**, refers to the compartment located superior to the talus, which contains the calcaneus (heel bone) and contributes to the stability and movement of the ankle joint. The superior compartment helps to prevent excessive dorsiflexion and eversion of the foot.

**Why Each Wrong Option is Incorrect:**

A. **1/3 medial**: This option is incorrect because the medial compartment contains the navicular bone, the cuboid bone, and the flexor retinaculum. Its primary function is to stabilize the medial malleolus of the tibia and the navicular bone during dorsiflexion and eversion of the foot.

B. **1/3 inferior**: This option is incorrect as the inferior compartment houses the fibula and the os calcis (calcaneus). Its primary function is to prevent excessive plantarflexion and inversion of the foot.

C. **1/3 lateral**: The lateral compartment houses the fibular sesamoid bones, the peroneal tendons, and the anterior talofibular ligament. Its primary function is to stabilize the lateral malleolus of the fibula and the talus during plantarflexion and eversion of the foot.

**Clinical Pearl:**
The talus bone is essential for maintaining joint stability and facilitating ankle movements, which makes understanding the compartments and their functions crucial for a comprehensive understanding of ankle joint anatomy, physiology, and pathology.

**Correct Answer:** D. 1/3 superior