See Figure 6, Homological Scaffolding while on Psilocybin vs Placebo User FatDabsIsGod, in the Shrooms and the Psychedelic Experience subreddit, 27 Sep 2018
"Homological scaffolds of brain functional networks" Oldish paper, but a cool application of persistent homology. User whatisdan, in the math subreddit, 05 Apr 2017
magic mushrooms may give users trippy experiences by creating a hyperconnected brain. The active ingredient in the psychedelic drug, psilocybin, seems to completely disrupt the normal communication networks in the brain, by connecting "brain regions that don't normally talk together." User Alantha, in the Science is awesome! subreddit, 18 Nov 2015
Homological scaffolds of brain functional networks User kanhy, in the Reddit Science subreddit, 07 Nov 2014