Intravenous DMT, a fast-acting psychedelic, markedly reduces alpha and beta brain wave power and increases spontaneous signal diversity in the human brain, as measured by EEG. The emergence of delta and theta oscillatory activity correlates with the peak of the subjective experience, especially its eyes-closed visual component. Relationships between changes in subjective experience and brain activity were observed across time, linking specific brain changes to specific aspects of the experience.
An analysis of the subjective experiences of psilocybin administered intravenously in an MRI scanner found effects consistent with prior reports on psilocybin's subjective effects. The article documents these phenomena and suggests further research is needed to explore the identified experiences.
Intravenous DMT, a fast-acting psychedelic, markedly alters human brain activity. Compared with a placebo, DMT reduced oscillatory power in alpha and beta brainwaves and increased spontaneous signal diversity. Time-referenced analyses linked changes in subjective experience to changes in brain activity. Emergence of delta and theta frequency oscillations correlated with the peak of the experience, particularly its eyes-closed visual component. These findings advance understanding of the neurobiological underpinnings of immersive states of consciousness.