Extensor Pollicis Brevis Muscle
Extensor pollicis brevis ( EPB) Muscle Anatomy Extensor pollicis brevis (EPB) is one of the muscles of the deep layer of the posterior compartment of the forearm. Along with extensor pollicis longus, it is responsible for extension of the thumb. Along with abductor pollicis longus it passes through the 1st extensor compartment of the wrist….