Brain&nervous system wiring of NDE subjects and/or astral travelers.
Both groups (also people that take psilocybin) show similar indicators (later onset of REM sleep for example) that are related to psychological health and increased well-being. Basically they are happy people that experience life more deeply, imo.
Iāve read that people that had a NDE are completely transformedā¦so a bit of a push into that direction wouldnāt hurt, along the brain wiring.
I donāt know how much of this may be covered by āWisdom of the Dyingā, āCollective Consciousnessā, āAstral Primerā and other fields.
My main interest would be in brain wiring. That could also be complex enough to deserve a unique field for the brain guild.