Hughlings Jackson, Sigmund Freud and Sir Charles Sherrington held similar views concerning the relation of brain and mind. Jackson and Freud believed that physical and mental processes comprise two distinct series of events, which are closely related but do not interact. Both men objected to the prevalent confusion of psychology with the physiology of the nervous system. Sherrington agreed that physical and mental processes are "incommensurable," but he believed that interaction is possible.When contrasted with rival theories, the doctrines of these men appear to be more acceptable, both logically and as a rationale for experiments on the neural basis of mind.Abstract Teaser