ابن زهر
Perhaps Ibn Zuhr's greatest contribution to medicine was his application of experimental method by introducing animal testing. He is known to have performed medical procedures on animals before doing them on humans to know if they would work. Most notable was his approval and recommendation for the surgical procedure of tracheotomy, which was a controversial procedure at the time. In trying to sort out the controversy, Ibn Zuhr described the following medical experiment which he performed on a goat: