Extensor digitorum longus muscle

= Deep fibular nerve nerve innervation { { { Nerve } }} Spinal segments L5, S1 The extensor digitorum longus (Latin for " long toe extensors ") is a skeletal muscle of the leg and is one of the extensors of the lower leg.

Anatomy in humans

The extensor digitorum longus arises when people at the front edge ( anterior border ) and head (caput fibulae ) of the fibula, the lower edge of the lateral condyle of the tibia ( lateral condyle of the tibia ), the interosseous membrane and the Unterschenkelfaszie ( crural fascia ). He runs towards the feet of four tendons that pull on each toe back. From the muscle, the peroneus tertius splits off, the outer edge of the foot attaches on.

The extensor digitorum longus is responsible for dorsiflexion ( pulling ) of the foot and the second to fifth toe.

Anatomy in quadrupedal mammals

With most four-footed mammals arises from the extensor digitorum longus peroneus tertius together with the in the fossa extensoria of the femur. The tendon of origin passes through the sulcus extensor of the tibia and is there a Ausssackung the knee joint capsule in the form of a capsule, tendon sheath ( vagina musculi tendinis extensoris digitorum longus ) wrapped.

In ruminants, the extensor digitorum longus two muscle bellies. The tendon of the medial belly moves to the middle phalanx of the second toe, the lateral muscle belly to the extensor process of the dog leg of the second and third toe. In horses, the tendon inserts on the processus of the extensor of the distal phalanx, with top predators processus unguicularis the claw leg of the second to fifth toes. In ungulates, the tendons are surrounded by synovial sheaths and / or bursae underlain.

In the four-footed mammals of the muscle stretches the toe joints and prevents the ankle.