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Psilocybin desynchronizes the human brain

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101–110 of 276 posts

Re: Psilocybin desynchronizes the human brain

#101

It's interesting that brain hypersynchronicity is a known source of epileptic seizures (among other things). This potentially could be a treatment for this specific problem. See e.g. * https://www.sciencedirect.com/science/article/pii/S089662731930964X * https://onlinelibrary.wiley.com/doi/full/10.1111/j.1528-1167.2010.02805.x

Doubtful. Shrooms cause seizures.

Re: Psilocybin desynchronizes the human brain

#102

This concerns Functional Connectivity[0], which is basically a measure of how temporally correlated regions are; those that fire in sync or in a strongly correlated pattern are functionally connected. Essentially, the TL;DR of this study is that psilocybin's 5-HT2A agonism seems to reduce synchronized FC activity not just in neurons but the whole brain: psilocybin makes parts of the brain overall that otherwise work…

I think the fact that nobody knows how to deal with negative correlations in functional connectivity takes away from the validity of the whole concept. People literally throw out negatively correlated voxels/ROI's. This, on top of the fact that functional connectivity is only related to physical connectivity in the abstract. (it's about the correlated time series activity in pixels over time, and isn't bound by any c…

I second the question below. The phase, magnitude, and polarity are all used. Yes, sure, you can focus on sub-systems with positive correlation under the presumption that joint increases in signal signify joint increases in O2 use and neuronal activity. Functional connectivity is functional more relevant than mere axonal connectivity. Only a small fraction of an axonal arbor — its collection of presynaptic terminals—-is functionally and reliably coupled to postsynaptic targets.

Re: Psilocybin desynchronizes the human brain

#103
post #63

Earlier quoted context omitted.

Many countries in Europe have tons of older hunting guns, on top of newish guns for... personal protection? Sport? Or whatever reason people feel the need to have them. Tens of millions as per wikipedia [1]. Also check other countries and continents. A very valid argument. [1] https://en.wikipedia.org/wiki/Estimated_number_of_civilian_g...

In most European countries you have to store the firearm in a locked safe, often with the bolt removed or the weapon disassembled and - quite often - with the ammunition stored separately in another locked container/safe. It’s a lot more “steps to take” to commit suicide than “take the weapon from your nightstand and shoot yourself”, given you have to unlock usually more than one safe/lockbox.

I assume that's not any of the concealed carry countries as that would completely defeat the point of having the gun. Definitely not the case where I live.

Re: Psilocybin desynchronizes the human brain

#104
post #84

While it's amusing in the short term, the long term side effects for me were awful. I felt like my brain was slow and unfocused, I was no longer quick in conversation or able to concentrate as well as usual, I felt disconnected from myself, sort of like when you recall a memory so old that it seems like it belongs to someone else, I had a headache for almost 3 weeks. Throwing this in here as there are a fair few "dud…

Mushrooms are very contradictory in their nature to the modern "cog in the machine" lifestyle. It's a bit like being subjected to a software fuzzer. I imagine if learning from one's inputs, one will be afterwards less sure of concepts one was very sure about, but also less sure about concepts thought previously to be impossible. That will surely increase cognitive load, especially when one's life is pretty straightfo…

Agreed.

Before a controlled high dose Psilocybin experience I "felt" my emotions: Anger, Fear, Frustration.

Afterwards, I gained the ability to observe and "catch" my emotions in-flight. Not sure if it was neuroplasticity induced by the substance, or "you don't know what your brain can do until you know it".

I liken it to previously having Ring 1 access to my thoughts, now I have Ring 0 access.

Definitely persistent: DRAMATIC improvement in my happiness and wellbeing.

YMMV

Re: Psilocybin desynchronizes the human brain

#105

Earlier quoted context omitted.

As I said in another post, the mental illness is not the issue here, the immediate access to a gun while blasted on shrooms is.

At least 42% of Americans live in a household with a gun so it isn't particularly useful to write off the anecdote.

And that's the problem. It's not particularly useful to write it off, particularly absurd that you do so on the grounds that it's an extremely prevalent problem.

Re: Psilocybin desynchronizes the human brain

#106

It's interesting that brain hypersynchronicity is a known source of epileptic seizures (among other things). This potentially could be a treatment for this specific problem. See e.g. * https://www.sciencedirect.com/science/article/pii/S089662731930964X * https://onlinelibrary.wiley.com/doi/full/10.1111/j.1528-1167.2010.02805.x

Doubtful. Shrooms cause seizures.

Sources?

Re: Psilocybin desynchronizes the human brain

#107
post #95

LSD is better, sorry :/

Psilocybin and LSD are both psychedelics and 5-HT2A agonists. Even though the study uses psilocybin, the findings should apply to LSD too.

Not really. Two ligands of the same receptor can have very different effects. There are 5ht2a agonists who don’t even cause perceptual effects. Besides, LSD has activities at several other receptors as well, which contributes to its effect.

Extrapolation of biological effect based on the receptor affinity of a ligand is a pretty crude hypotheses.

Re: Psilocybin desynchronizes the human brain

#108

This concerns Functional Connectivity[0], which is basically a measure of how temporally correlated regions are; those that fire in sync or in a strongly correlated pattern are functionally connected. Essentially, the TL;DR of this study is that psilocybin's 5-HT2A agonism seems to reduce synchronized FC activity not just in neurons but the whole brain: psilocybin makes parts of the brain overall that otherwise work…

Yeah, this is super interesting. The obvious follow up for me is what implication this desynchronization has on cognition. People who have done a lot of psilocybin tend to be quite a bit 'different' at least in my experience—they tend to be more reserved, maybe a bit more thoughtful, slower, introspective, etc. But what causes this change in personality? People who have done a lot of psilocybin seem to be a lot less…

The study uses cool methods but they are still at very crude global level and the temporal resolution is poor. Functional synchrony (or para-synchrony) is more of an initial pointer to the much faster synaptic processing we really would love to understand better. the ither limit is that fMRI studies focus on relatively large chunks of cortex, but lots of critical changes are sub-cortical. I’d love to see a focus on thalamo-cortico and cortico-thalamic modulation. I suspect these connections are just as important as cortico-cortical and cortico-hippocampal connections.

Finally, there will be a great deal of individual differences. One story will not fit all of us.

Re: Psilocybin desynchronizes the human brain

#109

It's interesting that brain hypersynchronicity is a known source of epileptic seizures (among other things). This potentially could be a treatment for this specific problem. See e.g. * https://www.sciencedirect.com/science/article/pii/S089662731930964X * https://onlinelibrary.wiley.com/doi/full/10.1111/j.1528-1167.2010.02805.x

Doubtful. Shrooms cause seizures.

Something tells me seizures have multiple causes and if the drugs is one cause it's not a cause for everybody.

Re: Psilocybin desynchronizes the human brain

#110

Earlier quoted context omitted.

Doubtful. Shrooms cause seizures.

Sources?

Anecdotal, but I've tripped with two people who showed seizure like symptoms that they never had before or since.

Couldn't find any data at the time. Tried to get them to submit experience reports on erowid so that there would be some data out there, but they didn't want to put anything about it in writing.

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