Posted today on the Neurophilosophy Blog: Seeing with eyes wide shut: Ayahuasca inner visions http://gu.com/p/325zy/tw
... about a new fMRI study looking into the effects of ayahuasca, a psychedelic religious sacrament brewed by shamans in the Amazonian rainforest, and used to induce mystical visions.
The post is illustrated with a painting from the book Ayahuasca Visions
), by the late Pablo Amaringo (http://www.pabloamaringo.com/
), who was himself a shaman.