extensorsenene

Extensor senene refers to the tendons on the back of the hand and forearm that are responsible for extending the fingers, thumb, and wrist. These tendons originate from muscles located in the posterior compartment of the forearm. When these muscles contract, they pull on the extensor tendons, which in turn straighten or extend the digits and wrist. The primary extensor tendons include the extensor digitorum, which extends the four fingers, and the extensor pollicis longus and brevis, which extend the thumb. The extensor digiti minimi extends the little finger, and the extensor indicis extends the index finger. The wrist extensors, such as the extensor carpi radialis longus and brevis, and the extensor carpi ulnaris, allow for dorsiflexion of the wrist. These tendons are often held in place by retinacula, which are fibrous bands that prevent them from bowstringing during movement. Conditions affecting these tendons can lead to difficulty in straightening the fingers, thumb, or wrist, and may include tenosynovitis, tendonitis, or tears.