Fascinatingly, in the last few years, it's been possible to do functional brain imagery, to do fMRI on people as they are hallucinating, and, in fact, to find that different parts of the visual brain are activated as they are hallucinating.
Fascinerande nog har det under de senaste åren varit möjligt att utföra funktionell magnetröntgen på personer medan de hallucinerar, och upptäcka att olika delar av hjärnan aktiveras under hallucinationerna.