Could a bump on the back of your head offer a clue to your inner personality? This idea was a central theme in the discipline known as phrenology, which involved linking bumps on a person's head to certain aspects of the individual's personality and character.
Invented in the late 1700s by Franz Joseph Gall, phrenology was briefly popular but is now viewed as a psuedoscience along the same lines as astrology, numerology, and palmistry. Because of phrenology, however, researchers became increasingly interested in the idea of cortical localization, or the idea that certain mental functions were localized in specific areas of the brain. Learn more about phrenology.
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