What is the distal interphalangal joint?

Distal interphalangal joint is one of two joints in four fingers and four smaller fingers. Found between the second and third Falangs - Falangs are three bones in each finger and the tip - it's the first joint from the tip of your fingers and legs. Compared to the proximal interphalangal joint, the second joint from the tips of the fingers and fingers is, the distal joint is slightly smaller and shows a narrower range of movement. In anatomy, the distal term of the relative placement, referring to the structure that is furthest from the tribe versus the one that is closest to the body or proximal. Since the thumb has only two phalanx more than three, there is no difference between the proximal and distal intermediate joints.

In this articulation, synovial joint joint, possible movements are a small degree of flexion and extension or bending and straightening of the fingers. Flexor Digitorum Profundus is a muscle responsible for the flexion of the distal interphalangal joint. Located deep in the palm side of the forearm, it is located on mAli side of the arm above the bone of the ulna. It is considered to be the outer flexor of the hand, which means that the body of the muscle is in the forearm, his hand penetrating only the tendon. The contraction of this muscle allows about 80 degrees of flexion in the distal joint, while the proximal joint has about 100 degrees of flexion.

The extension of the distal interphalangal joint is similarly initiated by the external muscle of the hand, the extensor digitorum. It is centrally located in the rear of the forearms with tendons flowing through the back of the hand to the center and the distal or the second and the third Falanga. Degree of the permitted extension is relatively limited by the presence of very strong bonds, palmar and collateral bonds that stabilize the joint and will be prevented by hyperextendi.

There is a similar joint between the middle and distal phalanx of each of the four smaller fingers. The big finger, like the thumb, has two phalanx, and therefore only one interphalangeal joint. Distal interphalangal articulation of the foot also does not allow any movement than flexion and extension, withby extension of limited presence of plantar and collateral bindings. The muscle that bends this joint is Flexor Digitorum Longus, the outer top flexor found in the rear compartment of the lower leg on the middle or tibial side. Extensor Digitorum Longus, located in the front compartment of the lower foot with four tendons embedded in four distal phalanx, is extended.