Hmm if its somehow produced by our body, it may effect dreaming i guess. since delta waves occur in a deep dreamless sleep/REM or whatever, and due to neuromapping report ive read that you posted sumwhere, it says most slightly decreases are at delta, theta and beta-1 band. possible but hard to make such conclusion at all. I have been to a near death experience and i agree it starts with a white light and some speech kinda things may be heard, but again hard to relate it to dmt i guess. So for now i think its no more than just a theory, since we dont know at which dose the body is producing dmt or is it really producing