Why does my extensor pollicis brevis hurt?
De Quervain’s Tenosynovitis is a painful condition which affects the thumb muscles (Abductor Pollicis Longus and extensor Pollicis Brevis). Commonly seen in females who are in the post-natal phase, it is caused by a rapid increase in load on the thumb muscles and tendons.
What does the extensor pollicis brevis muscle do?
Function. Together with extensor pollicis longus, extensor pollicis brevis is in charge of extension of the thumb in the first metacarpophalangeal joint. It also extends the thumb in the carpometacarpal joint of the thumb. This movement is important in the anatomy of the grip, as it enables letting go of an object.
Where is the extensor pollicis brevis muscle located?
forearm
Anatomical terms of muscle In human anatomy, the extensor pollicis brevis is a skeletal muscle on the dorsal side of the forearm. It lies on the medial side of, and is closely connected with, the abductor pollicis longus.
What is the extensor Pollicis?
Extensor Pollicis Longus – Physiopedia Description Extensor pollicis longus (EPL) is a long muscle located at the deep layer with extensor pollicis brevis, abductor pollicis longus, extensor indicis, and supinator muscle in the posterior compartment of the forearm.[1] It originates from the mid-third of the ulna, and …
The extensor pollicis brevis muscle is one of the five deep extensors of the forearm on the posterior forearm, together with the: It originates at the posterior side of the radius and the interosseous membrane and inserts at the base of the proximal phalanx of the thumb.
Which is the deep extensor of the thumb?
Extensor pollicis brevis is a deep extensor of the thumb that lies deep to extensor digitorum muscle. It sits directly medial to abductor pollicis longus and posterolateral to extensor pollicis longus muscle.
Which is extensor muscle innervates the radial nerve?
Like the other forearm extensors, the extensor pollicis brevis muscle is innervated by the radial nerve. Together with the tendon of the extensor pollicis longus and the radius, the extensor pollicis brevis tendon frames the anatomical snuffbox.
Where is the abductor pollicis longus located in the wrist?
Along with abductor pollicis longus, it is located in the first extensor (dorsal) compartment of the wrist. After passing under the retinaculum, the tendon runs laterally to insert onto the dorsal surface of the base of the proximal phalanx of thumb.
