Musculoskeletal Anatomy: Leg

Question 1

What are the muscles of the anterior compartment of the leg?

Answer 1

Tibialis anterior, extensor hallucis longus, extensor digitorum longus (from left to right on my right leg)

Question 2

What is the origin, insertion, and action of tibialis anterior?

Answer 2

O: Lateral tibial condyle and tibial shaft | I: Medial cuneiform | A: Dorsiflexion and inversion

Question 3

What is the origin, insertion, and action of extensor hallucis longus?

Answer 3

O: Fibula and interosseous membrane | I: Distal phalanx of the big toe | A: Dorsiflexion and extension of the big toe

Question 4

What is the origin, insertion, and action of the Extensor digitorum longus?

Answer 4

O: Lateral tibial condyle, head of the fibula and interosseous membrane | I: dorsum of the lateral 4 toes | A: dorsiflexion and toe extension.

Question 5

What are the muscles of the lateral compartment of the leg?

Answer 5

Fibularis/Peroneus longus, brevis and tertius

Question 6

What is the origin, insertion, and action of fibularis/peroneus longus?

Answer 6

O: Head of the fibula and proximal fibula | I: Medial cuneiform and plantar surface of metatarsal 1 | A: Plantarflexion and eversion

Question 7

What is the origin, insertion, and action of fibularis/peroneus brevis?

Answer 7

O: fibula | I: metatarsal V| A: Plantarflexion and eversion

Question 8

What are the muscles of the superficial posterior compartment of the leg?

Answer 8

Gastrocnemius and Soleus

Question 9

What is the origin, insertion, and action of gastrocnemius?

Answer 9

O: Medial and lateral supracondylar ridges (for medial and lateral heads, respectively) | I: Calcaneous via the calcaneal tendon | A: Plantarflexion and knee flexion

Question 10

What is the origin, insertion, and action of soleus?

Answer 10

O: Soleal line and head of fibula | I: Calcaneous via the calcaneal tendon | A: Plantarflexion