Human Movement Science & Functional Anatomy of the:

Fibularis (a.k.a. the Peroneal) Muscles

by Brent Brookbush MS, PES, CES, CSCS, ACSM H/FS

Insertion of Fibularis Longus - Image via


What's in a name?

Before we discuss these muscles in detail, we should briefly discuss what to call them.  The more modern name of these muscles is in reference to their origin on the fibula, just as the tibialis muscles are named in relation to the bone they cover.  But, the name "peroneals" actually accomplished the same rationale approach to naming.  It would appear that this bone was thought to resemble, and named after, the needle like part of the "clasp" that we still see used on some chains and other jewelry.  Peroneus stems from the Greek root of this word, while fibula stems from the Latin root.  As most of our anatomy is now based on latin roots it would seem rationale to stay consistent and call the muscles discussed in this article the fibularis longus, fibularis brevis, and the briefly mentioned fibularis tertius.


Fibularis Muscles (Peroneals) -



Fibularis Muscles:

Fibularis Longus

  • Origin: Lateral condyle of the tibia, head and proximal 2/3 of the Lateral surface of the fibula, intermuscular septa and adjacent deep fascia (11).
  • Insertion:  Lateral side of the base of the first metatarsal and of the medial cuneiform bone (11).

    • This muscles lies in the Lateral compartment between anterior and posterior intermuscular septa, adjacent to the fibula along with the fibularis brevis.  The belly of this muscle