Extensor pollicis brevis muscle - Origin, Insertion, Innervation & Function - Anatomy | Kenhub

Find more videos at: Subscribe to our YouTube channel: Extensor pollicis brevis muscle begins more distally at the posterior side of the radius and the interosseous membrane and courses to the proximal phalanx of the thumb. For more Human Anatomy video tutorials, interactive quizzes, articles and an atlas of Human Anatomy, go to !