Where are the origin and insertion points of the third fibular muscle?

Under normal circumstances, the fibularis tertius (third peroneal muscle) originates from the head of the fibula and the fibrous membrane of the fibula, and inserts into the Achilles tendon. The details are as follows:

The fibularis tertius is a muscle in the lower limb of the human body, located on the lateral side of the leg, and forms part of the lower leg muscle group. Specifically, the origin of the fibularis tertius is situated on the lateral aspect of the lower leg, at the upper portion of the head of the fibula and the fibrous membrane covering the fibula. The head of the fibula is part of the lower leg bones, located on the outer side of the leg, and serves as the primary origin site for the fibularis tertius. The fibrous membrane of the fibula is a thin layer of tissue covering the surface of the fibula, and also acts as one of the origins for this muscle.

The insertion point of the fibularis tertius is the Achilles tendon. The Achilles tendon is one of the strongest tendons in the human body, connecting muscles such as the gastrocnemius, soleus, and fibularis tertius, playing an important role in supporting and stabilizing the foot. The muscular belly of the fibularis tertius extends downward and ultimately attaches to the Achilles tendon, forming part of the lower leg muscle group.