rick doblin runs the multidisciplinary search for psychiatric research and also tom shroeder who lays it out in this great book called "acid test." thank you for being here. it's interesting. i read the book. it's terrific. we'll talk about that. mdma with posttramatic stress like we just saw, what do you think is happening there? do you have an idea what the mechanism or how you would describe what is happening in the brain? >> yeah, mdma reduced actively in the amygdala where fear is processed and it increases activity in the frontal cortex where people put things in association, in context. so people are able to look at traumatic memories, the fear is reduced, and then they're able to separate out it was happening then and not now. and then they don't have to be triggered so much when they have the memories. >> so if they're going through counseling, for example, it could make that counseling more effective, they're not as paralyzed if you will by the memories that are being brought up? >> yeah, we're saying that mdma itself is not the medicine, it's mdma assisted psychotherapy. >>