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The primary action of the extensor digitorum longus is to extend the lateral four toes at metatarsophalangeal joint.
Extensor digitorum longus tends to be overactive and tight to compensate for an inhibited tibialis anterior. Stretching and myofascial release of the muscle together with activation tibialis anterior is indicated to regain muscle balance and improve functional ankle dorsiflexion.
Extensor digitorum is a long muscle located in the posterior compartment of the forearm. Together with the extensor carpi ulnaris and extensor digiti minimi, extensor carpi radialis longus and brevis as well as the brachioradialis, it belongs to the group of superficial extensors of the forearm.
Actions: Extension of the lateral four toes and dorsiflexion of the foot; Innervation: Deep fibular nerve; Blood supply: Anterior tibial artery
The muscle passes under the superior and inferior extensor retinaculum of foot in company with the fibularis tertius, and divides into four slips, which run forward on the dorsum of the foot, and are inserted into the second and third phalanges of the four lesser toes.
This video covers the anatomy of the extensor digitorum longus muscle of the leg: origin, insertion, innervation and functions.
Extensor Digitorum Longus Muscle (Insertion, Origin, Actions & Innervations); explained beautifully in an illustrated and interactive way. Click and start learning now!
Insertion: Dorsal aspects of bases of both the middle and distal phalanges of the second, third, fourth, and little toes. Action: Extends second, third, fourth, and little toes; dorsiflexes foot at ankle joint. Innervation: Deep fibular nerve (L5-S1).
Interactive 3D model of the extensor digitorum longus muscle and information on its origin, insertion, action, innervation, and blood supply.
The extensor digitorum longus muscle performs several vital functions that contribute to the overall functionality of the foot and lower limb: Toe Extension: The primary function of the extensor digitorum longus is to extend the toes, specifically the second through fifth toes. This action is crucial for activities such as pushing off the ...