Editing Ivan Pavlov (section)

===Reflex system research===
{{Further|Reflex}}
{{for|broader coverage of 'Pavlovian response'|Classical conditioning}}
Pavlov contributed to many areas of physiology and neurological sciences. Most of his work involved research in [[temperament]], [[classical conditioning|conditioning]] and [[Reflex action|involuntary reflex actions]].
Pavlov performed and directed experiments on digestion, eventually publishing ''The Work of the Digestive Glands'' in 1897, after 12 years of research. His experiments earned him the 1904 Nobel Prize in Physiology and Medicine.<ref>{{cite web|url=http://nobelprize.org/nobel_prizes/medicine/laureates/1904/press.html |title=1904 Nobel prize laureates |publisher=Nobelprize.org |date=10 December 1904 |access-date=15 April 2012}}</ref>

These experiments included surgically extracting portions of the digestive system from nonhuman animals, severing nerve bundles to determine the effects, and implanting [[fistula]]s between digestive organs and an external pouch to examine the organ's contents. This research served as a base for broad research on the [[digestive system]]. Further work on reflex actions involved involuntary reactions to stress and pain.{{citation needed|date=October 2022}}