Thoracic limb

The thoracic limb is the anterior locomotor apparatus. It is connected to the trunk by a muscular junction called syssarcosis, without any direct bony articulation, which provides a certain degree of mobility.

It is divided into four main regions:

• the arm;

• the elbow;

• the forearm;

• the manus.

The thoracic limb contributes to locomotion by absorbing shocks, supporting the anterior part of the body, and stabilizing movement during walking or running. In domestic carnivores (dog, cat), it is flexible and mobile, allowing for fast and precise movements. In ruminants and equids, it is more rigid and massive, optimized for prolonged weight-bearing and endurance.