There was mo evidence of toxic manifestation of these substanses in these long-term users. We conducted pretty careful neuropsychological assessments on our ayahuasca subjects, and a light number of matched controls who had never taken ayahuasca, and we found that the ayahuasca subjects had, on certain parameter had significantantly better neuropsychological function.
With eyes closed they often have well-formed images... often of thematic content.