Where Do Hallucinations Come from?

Visual hallucinations may arise when the brain relies more heavily on expectations of sight than what can actually be seen. "Vision is a constructive process—in other words, our brain makes up the world that we 'see'," explains lead author Christoph Teufel from Cardiff University, in a press release.

Where do hallucinations come from in the brain?

One major theory is that hallucinations are caused when something goes wrong in the relationship between the brain's frontal lobe and the sensory cortex, said neuropsychologist Professor Flavie Waters from the University of Western Australia.

What are the causes of hallucinations?