Abductor pollicis longus muscle Abductor pollicis longus muscle In human anatomy, the abductor pollicis longus (APL) is one of the extrinsic muscles of the hand. As the name implies, its major function is to abduct the thumb at the wrist. Its tendon forms the anterior border of the anatomical snuffbox. The abductor pollicis longus lies immediately below the supinator and is sometimes united with it. It arises from the lateral part of the dorsal surface of the body of the ulna below the insertion of the anconeus, from the interosseous membrane, and from the middle third of the dorsal surface of the body of
Anatomical fugitive sheet as Edward William Tuson's ""A supplement to myology"", (London 1828), Gustave Joseph Witkowski's ""Anatomie iconoclastique"" (Paris 1874-1876) and Étienne Rabaud's ""Anatomie élémentaire du corps humain"" (Paris 1900). More recently Jonathan Miller's pop-up book ""The human body"" (London 1983), employed the same principle. Anatomical fugitive sheet Anatomical fugitive sheets are illustrations of the human body specially created to display internal organs and structures. Hinged flaps enable the viewer to see a body as if in various stages of dissection. They appeared for the first time in the 16th century and became popular as instructional aids. The parts were labelled, making it