Though phrenology is no longer considered a valid method of studying the brain, it did raise interesting questions that still help drive neuroscientific research today. This paper outlines the history of phrenology, and the contributions it made to the field of neuroscience.
"History of Phrenology,"
Sound Neuroscience: An Undergraduate Neuroscience Journal:
1, Article 16.
Available at: http://soundideas.pugetsound.edu/soundneuroscience/vol1/iss1/16