Lower limb - muscle of the leg

Question 1

Anterior leg muscles

Answer 1

• Tibialis anterior - dorsifexion and inversion of foot
• Lies lateral to tibia
• Extensor digitorum longus - extensor of lateral 4 toes and dorsiflexion
• lies lateral to tibialis anterior
• Extensor hallucis longus - extensor of big toe and dorsiflexion of foot
• lies deep to tibialis anterior and extensor digitorum longus

***All innervated by the deep fibular nerve

Question 2

Lateral leg muscles

Answer 2

Fibularis longus - most superficial
- eversion and plantar flexion of foot as wraps around medial malleolus under the foot

Fibularis brevis - deeper
- eversion of the foot as it passes over lateral malleolus and attaches in similar place to fibulas longus

***Both innervated by superficial fibular nerve

Question 3

Dorsal foot muscles

Answer 3

Extensor digitorum brevis - Extends lateral 4 toes at DIP

Extensor hallucis brevis - extends big toe at metatarsal joint

** Both innervated by the deep fibular nerve