Book excerpt: What are we exactly, when we are said to be our brain? This question leads Jan De Vos to examine the different metamorphoses of the brain: the educated brain, the material brain, the iconographic brain, the sexual brain, the celebrated brain and, finally, the political brain. This first, protracted and sustained argument on neurologisation, which lays bare its lineage with psychologisation, should be taken seriously by psychologists, educationalists, sociologists, students of cultural studies, policy makers and, above all, neuroscientists themselves.