The study, published in the Proceedings of the National Academy of Sciences, took an innovative approach by examining two groups of individuals with focal brain lesions resulting from injuries or disorders. One cohort consisted of 106 Vietnam veterans who suffered traumatic brain injuries in combat decades ago. The other included 84 patients from rural Iowa who experienced strokes, surgical complications, or other brain injuries.
Could all the sensations of "a presence" or ghosts or spirits just be by-products of electromagnetic or auditory pollution? Possibly. Nobody wants to look into it because "well, clearly, spirits and such aren't real!"
I'm an atheist and committed skeptic when it comes to anything supernatural, but I'd love to try all of those. I'd really love to try them on a high dose of mushrooms.
The impact brain chemistry has on all sorts of things is very poorly understood.
It's not just an impact. Everything we are IS brain chemistry. Emotions, thoughts, wants, desires, likes, dislikes, skills, talents... they're all just a combination of chemicals and firing synapses in the brain. We are biological meat bags. There's no such thing as a soul.