A hallucination is a species of reality, as capable of teaching you as a videotape about Kilimanjaro or anything else that falls through your life.

The world loves to be amused by hollow professions, to be deceived by flattering appearances, to live in a state of hallucination; and can forgive everything but the plain, downright, simple, honest truth.

But the strange thing, the thing that you can never explain to anyone, except another nut, or, if you're lucky, a doctor who has an unusual amount of sense-stranger than the hallucinations, or the voices, or the anxiety-is the way you begin to experience the edges of the mind itself... in a way other people just can't.

It's possible that the reason I've never experienced a ghostly presence is that my temporal lobes aren't wired for it. It could well be that the main difference between skeptics (Susan Blackmore notwithstanding) and believers is the neural structure they were born with. But the question still remains: Are these people whose EMF-influenced brains alert them to —presences— picking up something real that the rest of us can't pick up, or are they hallucinating? Here again, we must end with the Big Shrug, a statue of which is being erected on the lawn outside my office.

While he attends to his rats, Persinger gives me the lowdown on the haunt theory. Why would a certain type of electromagnetic field make one hear things or sense a presence? What's the mechanism? The answer hinges on the fact that exposure to electromagnetic fields lowers melatonin levels. Melatonin, he explains, is an anti-convulsive; if you have less of it in your system, your brain — in particular, your right temporal lobe— will be more prone to tiny epileptic-esque microseizures and the subtle hallucinations these seizures can cause.

Given her deafness, the auditory part of the brain, deprived of its usual input, had started to generate a spontaneous activity of its own, and this took the form of musical hallucinations, mostly musical memories from her earlier life. The brain needed to stay incessantly active, and if it was not getting its usual stimulation..., it would create its own stimulation in the form of hallucinations.