Extensor Index Finger

Extensor Index Finger: Anatomy, Function and Role in Wrist Movement

The extensor index finger, or musculus extensor indicis, is an important muscle in the hand. It begins on the ulna bone and extends to the bones of the index finger, where it is anchored. This muscle is responsible for extending the index finger and plays an important role in the movement of the hand.

Anatomy

The extensor of the index finger has a shape characteristic of the extensors of the hand. It begins on the upper third of the posterior surface of the ulna and passes through a canal on the posterior surface of the wrist, where it connects with the other extensors of the hand. The muscle then passes through a canal on the back of the hand and attaches to the bones of the index finger.

Function

The main function of the extensor index finger is to extend the index finger at the distal interphalangeal joints. Thus, the muscle plays an important role in the movement of the hand. In addition, the index finger extensor helps keep the finger straight, which is important for precise handling of objects.

Role in wrist movement

The extensor index finger works together with other hand muscles to provide precise and stable movement when performing a variety of tasks. For example, when playing a musical instrument or writing, the extensor muscle of the index finger helps control the finger and keep it in the desired position.

Conclusion

The extensor index finger is an important muscle in the hand, responsible for extending the index finger and playing an important role in the movement of the hand. The extensor index finger works together with other hand muscles to provide precise and stable movement while performing a variety of tasks. A well-developed index finger extensor muscle can help improve precision and control in many hand-related tasks.

Extension of the index finger (lat. Musculus extenso Indici) is the ability of a person, without outside help or with the help of an outside leg, to extend the right or left hand at the wrist joint to a position in which the angle between the thumb and the radius bone of the same name is 90° or more degrees . This term refers to a basic anatomical characteristic of the human body. The Latin letter "i" means the number "1", so the Latin word "indicis" is translated as "first" or "index". Accordingly, it comes from the Latin word “index”, which means finger. Extension of the fingers (palma dexter) is a function of the muscles of the hand and fingers in conjunction with the function of the long palmar muscles of the forearm, developed during the period of their physiological maturity and in adulthood, occurring without influence from the central nervous system or associated with its activity and providing opposition and retraction of the large finger and little finger in relation to the rest