/sci/ - Science & Math

I was reading an article that hypothesized that this image at least partly explains the structural differences between brains of people with high and low IQs. Here's the article:
https://www.researchgate.net/publication/325155490_Diffusion_markers_of_dendritic_density_and_arborization_in_gray_matter_predict_differences_in_intelligence

Now it got me wondering, what would happend if we took some individual with very high IQ whose brain is extremely structured like the high IQ one in the schematic and we made his neurons branch out in all directions like the low IQ one. You may immediately jump to the conclusion that it would make his brain the same as low IQ one, but that can't be true since his brain would still have much longer dendrites than the low IQ one.
I'm wondering because psychedelics such as LSD, DMT or ketamine are able of doing just that - branching out your nerve cells in all directions. Here's an absolutely amazing study which shows that in depth:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6082376/
In other words, given the information I've provided, when you put a high IQ person on psychedelics, what happens to his brain structure and what would be the effects of that?