Phineas Gage is written to have "dramatic brain damage which resulted in dramatic personality changes". Oh boy, but this where we run into some serious problems based on recent evidence that has been uncovered.
"By late 2008 an advertisement for a previously unknown public appearance by Gage had been discovered, as well as a report of his physical and mental condition during his time in Chile, and a description of what may well have been his daily work routine there as a long-distance coach driver. This new information suggests that the seriously maladapted Gage described by Harlow may have existed for only a limited time after the accident—that Phineas eventually "figured out how to live" despite his injury, and was in later life much more functional, and socially much better adapted, than has been thought".
So as we see that his personality back, however their is good reasons to doubt Harlows account.
"The uncertainty of Harlow's sources for the changes he describes in Gage, combined with the fact that he waited almost twenty years (between his first and second papers) to communicate those changes, constitute one of the main puzzles of the case."
So as we still it is looking more and more less likely that he suffered dramatic personality change to the point of showing evidence for full blown mind-brain dependency. This case is often cited by full blown support for very strong mind-brain dependency. But as i have shown it's no where near supportive of it.
Brain localizations studies all of them indicate the words "associated with". Of course no dualist denies that particular brain functions will be associated with different mental phenomena. Brain localizations studies, don't tell us one way or another if mind and consciousness are separate from the brain or produced by the brain.
A side note, wordy a member on infidels forum wondered what i mean by "Survivalism". Simple, survivalism refers to the belief in the survival of the conscious self after the death of the physical body. Survivalists attempt to prove survival with the methods of science, using as evidence such things as psychic phenomena, near death experiences, out-of-body experiences, electronic voice phenomena, mediumship, reincarnation research,and various forms of photography.Survivalism is by implication a form of philosophical dualism.