Ankle lateral compartment

Question 1

What is the origin, insertion and action for peroneus (fibularis) Longus

Answer 1

Origin - lateral tibial condyle (with EDL)
- upper 2/3 lateral surface of fibula
- lateral side of fibula head
Insertion - 2 slips
- base of 1st MT
- medial cuneiform (plantar & lateral surfaces)
Action - eversion and plantarflexors of foot
Supports arches of foot

Question 2

What is the origin, insertion and action for peroneus Brevis

Answer 2

Origin - lower 2/3 of lateral surface of fibula (anterior to peroneus Longus)
Insertion - tubercle on the lateral side of base of 5th MT
Action - eversion of foot
- plantarflexion at ankle

Question 3

What’s muscles are in the lateral compartment

Answer 3

Peroneus (fibularis) Longus

Peroneus (fibularis) Brevis