Muscles of the lateral compartment of the lower leg

Question 1

Fibularis longus

Answer 1

Origin:

• Upper lateral surface of fibula, head of fibula, and occasionally the lateral tibial condyle

Insertion:

• Undersurface of lateral sides of distal end of medial cuneiform and base of metatarsal I

Innervation:

• Superficial fibular nerve (L5, S1, S2)

Function:

• Eversion and plantarflexion of foot, supports arches of foot

Question 2

Fibularis brevis

Answer 2

Origin:

• Lower two thirds of lateral surface of shaft of fibula

Insertion:

• Lateral tubercle at base of metatarsal V

Innervation:

• Superficial fibular nerve (L5, S1, S2)

Function:

• Eversion of foot