Podcast
Questions and Answers
Which muscle primarily functions to invert the foot at the subtalar and transverse tarsal joints?
Which muscle primarily functions to invert the foot at the subtalar and transverse tarsal joints?
What is the origin of the Extensor digitorum longus muscle?
What is the origin of the Extensor digitorum longus muscle?
Which nerve supplies the muscles in the anterior compartment of the leg?
Which nerve supplies the muscles in the anterior compartment of the leg?
Which action is performed by the Fibularis tertius muscle?
Which action is performed by the Fibularis tertius muscle?
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What is the insertion point for the Extensor hallucis longus muscle?
What is the insertion point for the Extensor hallucis longus muscle?
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Flashcards
Tibialis anterior muscle location
Tibialis anterior muscle location
The tibialis anterior muscle is located in the anterior compartment of the leg. It originates from the tibia and the interosseous membrane and inserts on the medial cuneiform and first metatarsal bone.
Tibialis anterior nerve supply
Tibialis anterior nerve supply
The main nerve supply for the tibialis anterior is L4 and L5.
Extensor digitorum longus function
Extensor digitorum longus function
The extensor digitorum longus is a muscle that extends from the fibula to the toes. Its primary action is extending the toes and foot.
Extensor hallucis longus nerve supply
Extensor hallucis longus nerve supply
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Fibularis tertius function
Fibularis tertius function
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Study Notes
Muscles of Anterior Fascial Compartment of Leg
- Origin: Lateral surface of tibia and interosseous membrane; anterior surface of fibula’s shaft
- Insertion: Medial cuneiform and base of first metatarsal bone; expansion of lateral four toes; base of fifth metatarsal bone; base of distal phalanx of great toe
- Nerve Supply: Deep fibular (peroneal) nerve (L4,5; S1)
- Action: Extends foot at ankle joint; inverts foot at subtalar and transverse tarsal joints; holds up medial longitudinal arch of foot; extends toes; extends foot at ankle joint; everts foot
- Nerve Root: L4, 5; S1
- Additional Notes:
- The predominant nerve root supply is indicated using boldface type.
- Extension or dorsiflexion of the ankle is the movement of the foot away from the ground.
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Description
This quiz focuses on the muscles located in the anterior fascial compartment of the leg, including their origins, insertions, nerve supply, actions, and nerve roots. Test your knowledge and understanding of how these muscles contribute to foot movement and stability.
