I think it's about time for another good, old fashioned psychedelic neurochemistry rant. This story may seem a bit too romantic to my fellow psychedelic enthusiasts, but it's just something that came to mind.
As I said, I've been thinking about tryptamine all day. I read in the article about it I bought that it's theorized to work as opposite to serotonin. It binds to serotonin receptors as an agonist but has very low activity and so it behaves more like an antagonist. That got me thinking about 2C-B, 2C-C, 2C-D, and 2C-I. All four of them are said to behave antagonistically to serotonin because of their low efficacies, but what's significant is that they still activate the part of the 5-HT2A receptor that serotonin doesn't as agonists. I'm pretty sure that's why they still cause psychedelic hallucinations and ego loss even considering that. They're also, or at least 2C-B and 2C-I were for me, much less emotionally intense and more stimulant-like than other psychedelics. I've heard about people getting psychedelic effects from tryptamine as well, so if it's true that it blocks serotonergic activity then it might be this same way. Tryptamine is also a NMDA antagonist and so it could cause dissociative effects. I started thinking about what it's effects in the prefrontal cortex would be. Decreased serotonin activity disrupts rational thought processes and activation of the serotonin-insensitive function of 5-HT2A causes distortions of ego. It also deactivates metabotropic glutamate receptors, which I'm presuming is why it's known to block the neurotoxicity of NMDA antagonism. This of course frees tryptamine up to cause an out-of-body experience by blocking those receptors.
That's when I really got to thinking. The theory in the paper was that the tryptamine system opposed the serotonin system, and serotonin is the chemical related to calm, happy, and carefree mindsets. I started thinking, what if tryptamine is part of a stress reaction? What if norepinephrine release or something related to it in the prefrontal cortex caused an increase in tryptamine levels that amounted for the dissociation, time dilation, instinctive reactions, and loss of emotional reactions from heavy adrenaline rushes? I once thought that norepinephrine was somehow at the core of 5-HT2A ego loss, but now I'm thinking it could be the other way around. They say that 5-HT2A is involved in stress and depression, and psychedelics definitely set your mind on overdrive, but if tryptamine works the way I think it does then this could actually block those feelings and let you remain calm while still having psychedelic distortions of reality. The reason no psychedelic synesthesia or sensory hallucinations would be involved is because those happen in the visual cortex and this is all confined to the prefrontal cortex, but it would still cause the same kind of out-of-body effects. If all of
that is true, then it's possible that near-death experiences could actually result from the significant increase of tryptamine activity, which would make them psychedelic in nature. And if you ever actually read vivid descriptions of typical near-death OBEs, they definitely sound that way. This ties me back to when I was thinking that the out-of-body effects of adrenaline rushes must be tied into the same dopamine release that gets adrenaline junkies hooked, the one that happens in the mesolimbic pathway in response to prefrontal norepinephrine, which has also been identified in playing a role in the reward of stimulants and opioids. That dopamine pathway is known for being one of the key things involved in dreams, when that part of the brain is deactivated dreams just don't form. However, the prefrontal cortex has been more closely tied to out-of-body experiences. Interestingly, the mesolimbic pathway has a function called the amygdala hijack where in a moment of intense stress it can shut down the function of the prefrontal cortex, which is how the adrenaline rush effect works. With all that considered, it certainly made it seem like mesolimbic dopamine would be what was causing the increase in tryptamine levels in the prefrontal cortex.
Here's where it gets interesting. I remember finding a quote by Rick Strassman a while back saying that he found evidence that DMT levels increase during intense stress, like when you're approaching death. I really wish I knew where he got this information from, but there were no links to it. However, what's significant about it is that DMT is a direct metabolite of tryptamine. DMT only exists in the brain because tryptamine is metabolizing into it, which means that if DMT levels increase then tryptamine levels have probably increased even more. If DMT appears in situation of extreme stress, it would make sense to suggest that that means a very strong effect from tryptamine might be reached by that point. If this is the case, that would mean that dreams (and sex, and basically all recreational drug highs) also increase the levels of tryptamine in the prefrontal cortex. Since dopamine levels are at their very highest during dreams, this would cause high levels of tryptamine to shut down the serotonin receptor function of the prefrontal cortex and put you in that instinctive, non-lucid mindset, aside from the psychedelic and dissociative properties which would then be used to form the out-of-body experience that is the dream world. Significantly, DMT would not play a role because it activates serotonin receptors and serotonin receptors are very inactive during REM (correlating with tryptamine), but it would be present. It's possible that it may still bind to other receptors and have effects, but it's hard to say. This also ties into why the aforementioned 2C-x psychedelics are more stimulant-like because they feel more like the energy of REM than the usual emotional intensity of drugs like the classical psychedelics.
So, now back to my same old complaint. There's no hope of proving this right now, and may not be for some time.
But... but... but.... I want to know....

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