Posterior surface of fibula
Facies posterior
- Related terms: Posterior surface
Definition
The posterior surface of fibula is the largest among all surfaces. It is located between the medial (or interosseus) and posterior borders of the fibula.
Within its upper two-thirds, there is a vertical bony ridge (a.k.a. the oblique line), which divides the posterior surface of fibula into anterior and posterior sub-regions. The oblique line merges with the medial (interosseus) border below.
The anterior region extends between the interosseus (or medial) border and the vertical bony ridge and serves as the origin of the tibialis posterior muscle. Meanwhile, the posterior region lies between the bony ridge and the posterior border. It gives rise to the soleus muscle from its upper one-fourth portion and the flexor hallucis longus muscle from its lower three-fourths.
The peroneal artery releases a nutrient artery that enters the fibula through its posterior surface.
Please be aware that in the previous naming system, which utilized four borders and four surfaces for the fibula, the lateral surface is equivalent to the region situated between the posteromedial and posterolateral borders of the fibula. For additional details, please refer to the specific information regarding the fibula’s body.
______________________________________________________________________________
Text written by Muhammad A. Javaid, MD, PhD © 2023 IMAIOS.
Standring, S. and Gray, H. (2016). ‘Chapter 80: Pelvic girdle, gluteal region and thigh’ in Gray’s anatomy The anatomical Basis of Clinical Practice. (41st ed.) New York: Elsevier, pp. 1405-1406.
