The next big thing in cognitive neuroscience has to do with ablation studies. This is when parts of the brain were removed so function could be measured without this brain area. For example, a neuropsychologist can remove the cerebellum. After it is removed, the animal's balance was not good. This links the cerebellum to balance. As for brain damage, the most famous case is with Phineas Gage. This patient was working on the railroad when a piece of metal went through the front of his head. He did not die from this brain injury. However, his normal personality changed. This brought the idea that the frontal cortex, the part of the brain that was stabbed, controlled how a person acted. Another study found the localization of language in the brain. Two separate scientists studied patients with language problems. They found that their patients all had lesions or damage in two certain areas of their brain. One area known as Broca's area controlled talking. The other area Wernicke's area was found to control understanding of language.