Michael Talbot said in his book “The Holographic Universe”
In brief when all of these facts are considered together—the wide-spread nature of the Near Death Experience, the absence of demographic characteristics, the universality of the core experience, the ability of the NDEers to see and know things they have no normal sensory means of seeing and knowing, and the occurrence of NDE’s in patients who have flat EEGs— the conclusion seems inescapable: People who have NDEs are not suffering from hallucinations or delusional fantasies, but are actually making visits to an entirely different level of reality.