Editing Georg Ernst Stahl (section)

===Tonic motion===
As a physician, Stahl worked with patients and focused on the soul, or ''anima'', as well as blood circulation and tonic motion. ''Anima'' was a vital force that when working properly would allow the subject to be healthy; however, when malfunction of the ''anima'' occurred, so did illness. Tonic motion, to Stahl, involved the contracting and relaxing movements of the body tissue in order to serve the three main purposes. Tonic motion helped explain how animals produce [[heat]] and how [[fever]]s were caused. In Stahl's 1692 dissertation, ''De motu tonico vitali,'' Stahl explains his theory of tonic motion and how it is connected to blood flow within a subject, without citing [[William Harvey]]'s blood flow and circulation theories, which lacked an explanation of irregular blood flow. Also within the dissertation, 'practitioners' are mentioned as users of his theory of tonic motion.

Stahl's theory of ''tonic motion'' was about the [[muscle tone]] of the [[circulatory system]]. During his work at Halle, Stahl oversaw patients experiencing [[headache]]s and [[nosebleed]]s. Tonic motion explained these phenomena as blood needed a natural or artificial path to flow when a part of the body is obstructed, injured, or swollen. Stahl also experimented with [[menstruation]], finding that [[bloodletting]] in an upper portion of the body would relieve bleeding during the period. During the next period, the wound would experience pain and swelling, which would only be relieved by an opening in the foot. He also followed this procedure as a treatment for [[amenorrhoea]].<ref>{{cite journal|last1=Chang|first1=K|title=Motus Tonicus: Georg Ernst Stahl's Formulation of Tonic Motion and Early Modern Medical Thought|journal=[[Bulletin of the History of Medicine]]|date=2004|volume=78|issue=4|pages=767–803|doi=10.1353/bhm.2004.0161|pmid=15591695|s2cid=12488842|url=https://muse.jhu.edu/|access-date=20 April 2016}}</ref>