Which muscle is innervated by the deep peroneal nerve?

The muscle innervated by the deep peroneal nerve is the tibialis anterior. This muscle is located in the anterior compartment of the leg and plays a crucial role in dorsiflexion of the foot, which is the movement that lifts the foot upwards at the ankle. The deep peroneal nerve is a branch of the common peroneal nerve and primarily supplies the muscles in the anterior part of the leg, which includes the tibialis anterior.

Understanding the function and innervation of muscles is essential because it highlights how different neuromuscular connections contribute to movement. The tibialis anterior's contraction facilitates activities such as walking and running, making it vital for locomotion and balance.

The other muscles listed, such as the sartorius, soleus, and biceps femoris, are innervated by different nerves. The sartorius is primarily innervated by the femoral nerve, the soleus by the tibial nerve, and the biceps femoris by both the tibial and common peroneal nerves, depending on which head of the muscle is being referred to. Each of these nerves arises from different segments of the lumbar and sacral plexuses, demonstrating the complexity of the muscular and nervous systems.