" Psilocybin decreased the current source density of neuronal oscillations at 1.5-20 Hz within a neural network comprising the anterior and posterior cingulate cortices and the parahippocampal regions. Most intriguingly, the intensity levels of psilocybin-induced spiritual experience and insightfulness correlated with the lagged phase synchronization of delta oscillations (1.5-4 Hz) between the retrosplenial cortex, the parahippocampus, and the lateral orbitofrontal area."
Is possible that these now visible effects are also the kind of changes induced more directly by aplication of patterned low frequency electromagnetic fields like in the experiments by Persinger et all. See 
 Persinger, Michael A., and Todd R. Murphy. "Validating New Technologies to Treat Depression, Pain and the Feeling of Sentient Beings: A Reply to “Neuroscience for the Soul”." Neuroscience & Medicine 7.01 (2016): 27.
Last modified on 25-Nov-16