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Fibular Retinaculum Muscles (Fibularis Longus and Brevis at the Ankle)
Region: Leg & Foot Muscles · All leg & foot muscles
Fibular Retinaculum Muscles (Fibularis Longus and Brevis at the Ankle) at a glance
| Origin | Lateral fibula (both muscles) |
|---|---|
| Insertion | First metatarsal base (longus, via the sole) and fifth metatarsal base (brevis) |
| Actions | Evert the foot and brace the lateral ankle |
| Nerve supply | Superficial fibular nerve (L5–S2) |
◆ Good to know
Their tendons share a groove behind the lateral malleolus held by the fibular retinacula — when the retinaculum tears, the tendons can snap out of place with a painful click.
More Leg & Foot Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.