Extensor thumb of the hand Short

Extensor pollicis brevis: Anatomy, Functions and Meaning

The extensor pollicis brevis muscle, also known as the extensor pollicis brevis, pna, bna, jna, is one of the key muscles in the human hand. This muscle is located in the back of the forearm and is responsible for extending the thumb.

Anatomy of the extensor pollicis brevis

The extensor pollicis brevis starts from the upper third of the radial bone and the interosseous membrane. It then passes through the canal formed by the radius and ulna bones and ends at the bones of the thumb.

Functions of the extensor pollicis brevis

The function of the extensor pollicis brevis is to extend the thumb at the metacarpophalangeal and interphalangeal joints. It is also involved in wrist extension.

The meaning of the extensor pollicis brevis

The extensor pollicis brevis plays an important role in a person's daily life because it allows a wide range of movements of the hand and fingers. Thanks to this muscle, we can, for example, hold objects in our hands, press keyboard keys, and much more.

The extensor pollicis brevis is also of great importance in sports and music. For example, musicians who play keyboard instruments often experience stress on the extensor pollicis brevis when playing fast melodies.

Conclusion

The extensor pollicis brevis muscle is an important muscle that allows for a wide range of movements of the hand and fingers. Its significance is not limited to the daily life of a person, it also has great significance in sports and music. Understanding the anatomy and function of this muscle can help people take care of their health and prevent injuries to their arms and hands.

Extensor pollicis (first finger, a1, a2) muscle of the forearm. Consists of two parts, deep and superficial. The deep part begins on the lateral side of the epicondyle of the humerus. Attached to the base of the first finger. The tendon of one of these parts goes around the scaphoid behind