5-MeO-DMT induces sleep-like LFP spectral signatures in the hippocampus and prefrontal cortex of awake rats.
Level 5 - mechanism / opinion, no new human data
Animal electrophysiology study (preclinical research)
PubMed 38760450 · doi:10.1038/s41598-024-61474-9
What was done
Local field potentials (LFPs) were recorded in the hippocampus (HP) and medial prefrontal cortex (mPFC) of freely behaving rats following administration of 5-MeO-DMT. Spectral power across delta, theta, slow gamma (20–50 Hz), and mid-gamma (50–100 Hz) bands, along with theta phase modulation and spectral state maps, was analyzed while controlling for locomotion speed.
What was found
5-MeO-DMT administration led to an increase in delta power and a decrease in theta power in hippocampal LFPs that could not be accounted for by locomotion changes. It also caused a dose-dependent reduction in slow and mid-gamma power and reduced theta phase modulation after controlling for speed and theta power. State map analysis revealed that the waking spectral profile under 5-MeO-DMT resembled electrophysiological states of slow-wave sleep (SWS) and rapid-eye-movement (REM) sleep. No exact numeric values or effect sizes were reported in the abstract.
Why it matters
These findings suggest that acute psychedelic effects involve the intrusion of sleep-like neural oscillations into waking brain networks, demonstrated in freely moving animals without the confounding effects of anesthesia.
Limits
The study was conducted in rodents, which limits direct translation to human subjective psychedelic effects. The abstract does not report the sample size (n), specific dosages, control conditions, or numerical statistical estimates.
Cited by
- supports Preliminary neuroimaging and EEG data on 5-MeO-DMT indicate that it induces slow-wave brain activity in addition to psychedelic brain expansion.