Muscles of the Foot Dorsum | Origins, Insertions, Actions, Etc.

This video tutorial explores the muscles in the dorsal foot compartment, focusing on their relationship with the anterior leg muscles. It covers the extensor hallucis longus and extensor digitorum longus, detailing their origins, insertions, and functions. The video also compares these longus muscles with their shorter counterparts, the extensor hallucis brevis and extensor digitorum brevis, highlighting differences in their anatomical features. Additionally, it discusses the innervation and blood supply of these muscles, emphasizing the role of the deep perineal nerve and dorsalis pedis artery.

Which muscles are located in the dorsal foot compartment?

• Extensor digitorum brevis and extensor hallucis brevis

• Extensor digitorum longus and extensor hallucis longus

• Flexor digitorum longus and flexor hallucis longus

• Tibialis anterior and peroneus longus

What is the primary function of the extensor hallucis longus muscle?

• Abduction of the great toe

• Extension of the great toe

• Adduction of the great toe

• Flexion of the great toe

Where does the extensor digitorum longus muscle originate?

• Calcaneus

• Superior 2/3 of the fibula

• Tibia

• Middle 1/3 of the fibula

What is the difference between extensor hallucis longus and extensor hallucis brevis in terms of insertion?

• Longus inserts on the proximal phalanx, brevis on the distal phalanx

• Both insert on the distal phalanx of the great toe

• Longus inserts on the distal phalanx, brevis on the proximal phalanx

• Both insert on the proximal phalanx of the great toe

Which muscle shares tendons with extensor digitorum longus?

• Flexor digitorum longus

• Extensor hallucis longus

• Extensor digitorum brevis

• Flexor hallucis longus

Which nerve innervates the dorsal foot muscles?

• Tibial nerve

• Deep perineal nerve

• Superficial peroneal nerve

• Sural nerve

What is the blood supply to the dorsal foot muscles?

• Fibular artery

• Posterior tibial artery

• Medial plantar artery

• Dorsalis pedis artery