page_title: Peroneus brevis
section_title: Structure
hierarchical_section_title: Peroneus brevis / Structure
caption_attribution_description: English: Caption: The muscles of the anterior compartment of the lower leg are generally responsible for dorsiflexion, and the muscles of the posterior compartment of the lower leg are generally responsible for plantar flexion. The lateral and medial muscles in both compartments invert, evert, and rotate the foot. URL: https://cnx.org/contents/FPtK1zmh@8.108:y9_gDy74@5/Appendicular-Muscles-of-the-Pe Other versions:
context_page_description: The peroneus brevis muscle lies under cover of the peroneus longus, and is the shorter and smaller of the peroneus muscles.
context_section_description: It arises from the lower two-thirds of the lateral surface of the body of the fibula, medial to the peroneus longus, and from the intermuscular septa separating it from the adjacent muscles on the front and back of the leg.
  The fibers pass vertically downward, and end in a tendon which runs behind the lateral malleolus along with but in front of that of the preceding muscle, the two tendons being enclosed in the same compartment and lubricated by a common mucous sheath.
  It then runs forward on the lateral side of the calcaneus, above the calcaneal tubercle and the tendon of the peroneus longus, and is inserted into the tuberosity at the base of the fifth metatarsal bone, on its lateral side. When the base of the fifth metatarsal is fractured, the peroneus brevis may pull on and displace the proximal fragment (Jones Fracture). An inversion sprain of the foot may pull the tendon such that it avulses the tuberosity at the base of the fifth metatarsal.
caption: The fibularis brevis (bottom-most label) is a muscle of the lower leg, and aids in plantarflexion and eversion of the foot.
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