psylocybin affects activity in the "claustrum" ...

 https://psychedelicreview.com/the-role-of-the-claustrum-in-the-psychedelic-experience/

https://en.wikipedia.org/wiki/Claustrum#:~:text=The%20claustrum%20(Latin%2C%20meaning%20%22,the%20thalamus)%20of%20the%20brain.