(+/-)EVALUATION: The unique case study of Phineas Gage supports the theory of localisation. Gage had a rod go straight though his left cheek, past behind his left eye and taking out, most importantly, damaging most of his left frontal lobe wherein mood regulation and 'personality' are held. This profoundly affected who he was. According to those who knew Gage, he was calm and reserved but after the incident, he became angry and ill-tempered very quickly. Although this historical case study is rich and detailed in data, it cannot be generalised to the rest of the population or repeated due to ethics.