Final answer:
The tibia and fibula are lower leg bones joined by the interosseous membrane and ligaments, forming a syndesmosis which provides ankle stability. Injury to this area, like a high ankle sprain, can result from lateral twisting and damage to tibiofibular ligaments.
Step-by-step explanation:
The question refers to the anatomical structure of the lower leg, specifically the tibiofibular joint and related ligaments. The tibia and fibula are the two bones that comprise the lower leg, with the tibia being the larger, weight-bearing bone on the medial side, and the fibula being the slender, non-weight-bearing bone on the lateral side. Interosseous membrane and ligaments join these bones, especially at their distal ends near the ankle, forming a syndesmosis. This connection plays a crucial role in ankle stability and preventing the separation of these bones.
Injuries such as a syndesmotic ankle sprain, commonly known as a 'high ankle sprain', can occur due to lateral twisting of the leg, which may result in stretching or tearing of the tibiofibular ligaments. The posterior talofibular ligament is another important structure associated with the lateral side of the ankle joint that supports the talus at the talocrural joint and resists excessive inversion of the foot.