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
Ancient Egyptian anatomical studies the reign of the pharaoh, within which the book is known to have been written. Two individuals, Herophilus, and Erasistratus, both living within Alexandria and participating within the so-called School of Alexandria, both contributed to anatomical understanding and knowledge, as they began a practice of human dissection. Egyptian civilization was responsible for the advent of terms for external body parts, of all body parts practitioners were aware of, "metu", understood to refer to the heart, was central to ancient understandings of anatomy within relevant areas of Egypt. Knowledge of anatomical studies is drawn from papyri and ostraca, especially the Ebers,