Andrew Huberman· PhD
Essentially, what I'm describing here is that serotonin to a receptor activation allows for more broad, less precise, and less hierarchical activation of brain circuitry. And when I say hierarchical, what I mean is that normally things go from periphery, from eyes, to thalamus, to visual cortex. However, when under the influence of psilocybin, as I mentioned before, even in the eye mask, the visual cortex is going to be very activated even in the absence of any visual input.