10 Questions
What is the origin of the Tibialis anterior muscle?
Upper of lateral surface of tibia
Which nerve supplies the Tibialis anterior muscle?
Deep peroneal nerve
What is the action of the Extensor hallucis longus muscle?
Extension of the big toe
Which muscle is not part of the anterior compartment of the lower leg?
Gastrocnemius
What is the action of the Tibialis anterior muscle at the subtalar joint?
Inversion
What is the origin of the Extensor Hallucis longus?
Middle 2/4 of anterior surface of fibula
Which nerve supplies the Extensor Digitorum longus?
Deep peroneal nerve
What is the action of the Extensor Hallucis longus?
Extension of all joints of big toe and dorsiflexion of ankle
Where do the tendons of the Extensor Digitorum longus insert?
Base of distal phalanx of lateral 4 toes
How many tendons does the Extensor Digitorum longus divide into?
4
Study Notes
Anterior Compartment of the Leg
- Muscles in the anterior compartment: Tibialis anterior, Extensor hallucis longus, Extensor digitorum longus, and Fibularis tertius (Peroneus tertius)
Tibialis Anterior
- Origin: Upper 2/3 of lateral surface of tibia
- Insertion: Medial cuneiform bone and base of 1st metatarsal bone
- Nerve supply: Deep peroneal nerve
- Actions: Dorsiflexion at ankle joint, Inversion of foot at subtalar joint
Extensor Hallucis Longus
- Origin: Middle 2/4 of anterior surface of fibula
- Insertion: Base of distal phalanx of big toe
- Nerve supply: Deep peroneal nerve
- Actions: Extension of all joints of big toe, Dorsiflexion of ankle
Extensor Digitorum Longus
- Origin: Upper 3/4 of anterior surface of fibula
- Insertion: Bases of distal phalanges of lateral 4 toes (divide into 4 tendons)
- Nerve supply: Deep peroneal nerve
- Actions: Extension of all joints of lateral toes, Dorsiflexion of ankle
Test your knowledge of the muscles found in the anterior compartment of the lower leg, including their origins, insertions, nerve supply, and actions. This quiz covers the Tibialis anterior, Extensor hallucis longus, Extensor digitorum longus, and Fibularis tertius muscles.
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