What is extensor digitorum longus?
Extensor Digitorum Longus is the muscle of the front section of the lower leg. Responsible for extending four smaller fingers and dorsiflexing ankle is considered to be the outer extensor of the foot in that it is located outside the leg itself. The long and narrow muscle extending just below the knee joint to the distal phalanx, the last of the bones of the tips, is located on the outside of the shin above the fibula bone. However, although it runs parallel to the fibula, its fibers are pennate, which means that instead of longitudinal triggering move towards the middle line, such as veins in the leaf.
When its fibers converge on both sides of the muscle instead of from the narrow point at the top, the extensor digitorum longus has its origin on several different structures in the lower leg. Some of its fibers are based on the bone of the tibia - specifically lateral condyle, which is the farthest of the two rounded bone eminence at the top of the bone. Others come from the front of the fibules belowThe highest 75 percent of the bone shaft. This muscle also occurs from several membrane structures surrounding and division of muscles in this area, including interosseous membrane, which separates the front and rear compartments of the lower legs, deep fascia that surround the muscles as a sausage cover and brushes and brushes and wash and wash and and anterior.
These fibers converge significantly above the ankle to form a tendon that passes vertically in front of the ankle joint and behind the ligament in the shape of Y known as a crossed Christian ligament. From there, the tendon differs to four smaller tendons, which are attached in the middle and distal phalanx or the last two bones of four smaller fingers. The draft on these tendons with the Textensor Digitorum Longus contractions is what expands his fingers on his feet, or pulls them up from the undulating position.
In addition to the effect of this muscle in a smaller four fingers, it plays a role in the dorsiflexing ankle. Dorsiflexion is an act of hanging a foot on the ankle so that the dorsal or upper surface of the foot approachto the shin. While the front tibialis is the primary dorsiflexor ankle, other muscles with tendons passing through the joint - among them extensor digitorum Longus and extensor hallucis longus, which expands a large finger - help in this movement.