Sensory deprivation

I've read a few online medical papers and articles on this issue, as on a smaller scale I myself have observed in the many visits to underground tunnels and dark buildings the effects of sensory deprivation. I'm interested in the connection it may have with people who like myself go on ghost hunts and vigils as to how much this contributes to seeing things whilst immersed in this environment. As well as how this contributes as well as enhances a "paranormal" experience.

http://youtu.be/0nnekxGE0nM

I found this video helpful in explaining how sensory deprivation works.

Also the gentleman who was kept in solitary confinement was clearly still quite upset about his experiences.