What is an extensor indis?

Extensor indis is muscles located in the back of the forearm. It is considered to be the external muscles of the hand in the fact that it is in the forearm, but acts on the joint in the hand. Specifically, this muscle is responsible for extending or straightening the pointing finger, although because it passes through the wrist joint, it also helps other forearm muscles in the extension of the wrist or bends back so that the dorsal side of the hand closer to the forearm. Extensor Pollicis Longus, which expands his thumbs. Like the other muscles found here, it is a long, strap muscle that runs parallel to the forearm. Indis fibers that come on the lower third of the ulna on its rear surface.

runs deep to one of the four tendons of the extensor digitorum, which extends two interphalangal joints in each of the four fingers, the tendon of the indicators then inserts on the back of the proximal, medium and distal phalanx, three bones in the index finger,to form as an extensor hood. The extension hood is a type of aponeurosis, a wide expansion of tendos' fibers that spans the dorsal surface of these bones and is an extension of tendons both indivicles and extensor digitorum. By connecting to the finger, the muscles can act on more joints like once and stretch the entire finger until they create a line.

As well as many of the extensor forearm muscles, the Extensor Indivis acts not only on the finger joints, but on the other side and wrist. Because his tendon intersects the metacarpofalance of the joint on the base of the index finger, the articulation between the second proximal phalanx and the second metacarpal in the hand, which is visible as a large joint in the production of the fist, also expands this joint. In addition, when it intersects the wrist or radiocarpal joint, this muscle plays a small role in the extension of the wrist, although the extension of the wrist is largely the result of contractions of the extensor carpi radialis and extensor Carpi Ulnaris on the forearm.