Psilocybin, Meditation, Mystical Experiences, and the Brain Derrick Broze October 22, 2015 6119 Text to Audio Player At the 2015 Horizons Psychedelic Conference Derrick Broze spoke with Frederick Barrett, PH.D., Faculty member in Psychiatry and Behavioral Sciences at John Hopkins University School of Medicine. Fred Barrett discusses preliminary findings and possible implications of a groundbreaking study that uses behavioral and brain imaging techniques to investigate mystical experiences encountered with meditation and psilocybin.