Which nerve innervates the soleus muscle?

The soleus muscle, located in the posterior compartment of the leg, is primarily responsible for plantar flexion of the foot at the ankle joint. It plays a crucial role in activities such as walking, running, and standing.

The correct nerve that innervates the soleus is the tibial nerve. This nerve is a branch of the sciatic nerve and runs down the back of the leg, providing motor innervation to the gastrocnemius and soleus muscles, also known as the calf muscles. The tibial nerve's role is vital because it allows for the appropriate muscle contraction needed for effective movement and stability during ambulation.

The other options refer to nerves that do not innervate the soleus muscle. The deep peroneal nerve primarily supplies the muscles in the anterior compartment of the leg and the dorsum of the foot, while the common peroneal nerve, which branches off the sciatic nerve, is also involved in innervating the anterior and lateral compartments. The femoral nerve innervates muscles in the anterior thigh and does not have any direct role in leg muscles. Thus, the tibial nerve is the correct choice for the innervation of the soleus muscle.