Name
Pronunciation
(per-o-NE-us BREV-is)
Origin/Proximal Attachment
Inferior two thirds of lateral surface of fibula, anterior to peroneus longus
From anterior & posterior crural intermuscular septa
Insertion/Distal Attachment
Dorsal surface of tuberosity on lateral surface of base of fifth metatarsal.
Action/Relevance
Everts foot
Weakly plantar-flexes foot
May limit inversion of the foot
May help to steady the leg on the foot
Innervation
Superficial peroneal nerve (L5, S1)
Notes
Fusiform
Passes vertically down & ends in a tendon which passes behind the lateral malleolus together with, but anterior to, that of the peroneus longus, the two tendons running deep to the superior peroneal retinaculum in a common synovial sheath.
It then runs forward on the lateral side of the calcaneus above the peroneal trochlea & the tendon of peroneus longus.
On the lateral surface of the calcaneus the tendons of longus & brevis occupy separate osseo-aponeurotic canals formed by the calcaneus & the inferior peroneal retinaculum; each tendon enveloped in a separate forward prolongation of the common synovial sheath.