- Extensor digitorum longus muscle
Extensor digitorum longus muscle The mucous sheaths of the tendons around the ankle. Lateral aspect. (Extensor dig. longus labeled at upper right.) Latin musculus extensor digitorum longus Gray's subject #129 481 Origin Anterior lateral condyle of tibia, anterior shaft of fibula and superior ¾ of interosseous membrane Insertion Dorsal surface; middle and distal phalanges of lateral four digits Artery anterior tibial artery Nerve peroneal nerve Actions extension of toes and ankle Antagonist Flexor digitorum longus, Flexor digitorum brevis
The Extensor digitorum longus is a pennate muscle, situated at the lateral part of the front of the leg.
Origin and insertion
It arises from the lateral condyle of the tibia; from the upper three-fourths of the anterior surface of the body of the fibula; from the upper part of the interosseous membrane; from the deep surface of the fascia; and from the intermuscular septa between it and the Tibialis anterior on the medial, and the Peronæi on the lateral side. Between it and the Tibialis anterior are the upper portions of the anterior tibial vessels and deep peroneal nerve.
The muscle passes under the transverse and cruciate crural ligaments in company with the Peronæus 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.
The tendons to the second, third, and fourth toes are each joined, opposite the metatarsophalangeal articulation, on the lateral side by a tendon of the Extensor digitorum brevis. The tendons are inserted in the following manner: each receives a fibrous expansion from the Interossei and Lumbricalis, and then spreads out into a broad aponeurosis, which covers the dorsal surface of the first phalanx: this aponeurosis, at the articulation of the first with the second phalanx, divides into three slips—an intermediate, which is inserted into the base of the second phalanx; and two collateral slips, which, after uniting on the dorsal surface of the second phalanx, are continued onward, to be inserted into the base of the third phalanx.
This muscle varies considerably in the modes of origin and the arrangement of its various tendons.
The tendons to the second and fifth toes may be found doubled, or extra slips are given off from one or more tendons to their corresponding metatarsal bones, or to the short extensor, or to one of the interosseous muscles.
A slip to the great toe from the innermost tendon has been found.
- LUC exdl
- -590348211 at GPnotebook
- SUNY Labs 15:st-0401
- Extensor+digitorum+longus at eMedicine Dictionary
List of muscles of lower limbs (TA A04.7, GA 4.465) ILIAC Region
BUTTOCKS THIGH /
compartmentsfibularis muscles (longus, brevis)
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Look at other dictionaries:
extensor digitorum longus muscle — musculus extensor digitorum longus … Medical dictionary
Extensor digitorum brevis muscle — Infobox Muscle Name = PAGENAME Latin = musculus extensor digitorum brevis GraySubject = 131 GrayPage = 490 Caption = The mucous sheaths of the tendons around the ankle. Lateral aspect. (Extensor dig. brevis labeled at upper right.) Caption2 =… … Wikipedia
Extensor hallucis longus muscle — Infobox Muscle Name = PAGENAME Latin = musculus extensor hallucis longus GraySubject = 129 GrayPage = 481 Caption = The mucous sheaths of the tendons around the ankle. Lateral aspect. (Ext. hall. long. labeled at upper left.) Caption2 = Cross… … Wikipedia
extensor digitorum longus — extensor digitorum lon·gus lȯŋ gəs n a pennate muscle on the lateral part of the front of the leg that extends the four small toes and dorsally flexes and pronates the foot … Medical dictionary
Flexor digitorum longus muscle — Muscle infobox Name = Flexor digitorum longus muscle Latin = GraySubject = 129 GrayPage = 485 Caption = Tendons of the foot, medial view. Caption2 = Origin = Insertion = Action = Primary action is Flex digits Antagonist = Extensor digitorum… … Wikipedia
musculus extensor digitorum longus — [TA] long extensor muscle of toes: origin, anterior surface of fibula, lateral condyle of tibia, interosseous membrane; insertion, extensor expansion of each of the four lateral toes; innervation, deep peroneal; action, extends toes … Medical dictionary
Extensor hallucis brevis muscle — Muscle infobox Name = Extensor hallucis brevis Latin = musculus extensor hallucis brevis GraySubject = 129 GrayPage = 490 Caption = The mucous sheaths of the tendons around the ankle. Medial aspect. (Ext. hall. long. labeled at top center.)… … Wikipedia
Extensor carpi ulnaris muscle — Extensor carpi ulnaris Posterior surface of the forearm. Extensor carpi ulnaris labeled in purple at center right. Latin musculus extensor carpi ulnaris … Wikipedia
Extensor digitorum muscle — Muscle infobox Name = Extensor digitorum muscle Latin = musculus extensor digitorum GraySubject = 125 GrayPage = 451 Caption = Posterior surface of the forearm. Superficial muscles. (Extensor digitorum communis visible at center.) Caption2 =… … Wikipedia
Flexor pollicis longus muscle — Muscle infobox Name = Flexor pollicis longus muscle Latin = musculus flexor pollicis longus GraySubject = 125 GrayPage = 449 Caption = Front of the left forearm. Deep muscles. (Flexor pollicis longus is shown in blue) Caption2 = Origin = The… … Wikipedia