Podcast
Questions and Answers
What is the origin of the Tibialis anterior muscle?
What is the origin of the Tibialis anterior muscle?
- Base of 1 metatarsal bone
- Upper of lateral surface of tibia (correct)
- Middle 1/4 of fibula
- Medial cuneiform bone
Which nerve supplies the Tibialis anterior muscle?
Which nerve supplies the Tibialis anterior muscle?
- Tibial nerve
- Sciatic nerve
- Deep peroneal nerve (correct)
- Peroneal nerve
What is the action of the Extensor hallucis longus muscle?
What is the action of the Extensor hallucis longus muscle?
- Dorsiflexion at the ankle joint
- External rotation of the foot
- Extension of the big toe (correct)
- Plantarflexion at the ankle joint
Which muscle is not part of the anterior compartment of the lower leg?
Which muscle is not part of the anterior compartment of the lower leg?
What is the action of the Tibialis anterior muscle at the subtalar joint?
What is the action of the Tibialis anterior muscle at the subtalar joint?
What is the origin of the Extensor Hallucis longus?
What is the origin of the Extensor Hallucis longus?
Which nerve supplies the Extensor Digitorum longus?
Which nerve supplies the Extensor Digitorum longus?
What is the action of the Extensor Hallucis longus?
What is the action of the Extensor Hallucis longus?
Where do the tendons of the Extensor Digitorum longus insert?
Where do the tendons of the Extensor Digitorum longus insert?
How many tendons does the Extensor Digitorum longus divide into?
How many tendons does the Extensor Digitorum longus divide into?
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
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Description
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.
