Electroencephalography, or EEG, records electrical patterns at the scalp. Reports of beta or high-beta changes can indicate that brain activity differs across a measurement window. They cannot, by themselves, identify a therapeutic mechanism or demonstrate that an effect will persist.
Neurotrophic and neuroplasticity hypotheses are also prominent. In plain language, they ask whether downstream cellular signaling might support changes in synapses or neural structure after exposure. Much of this discussion comes from laboratory and animal work; it should not be converted into a claim that such changes have been established in people. The National Institute of Neurological Disorders and Stroke’s overview of brain function illustrates how broadly coordinated brain processes are, which is one reason single-marker explanations require caution.
Human evidence is limited by small samples, variable protocols, non-randomized designs, co-occurring clinical factors, and incomplete long-term follow-up. The ClinicalTrials.gov research registry is useful for distinguishing an active study from a completed, replicated finding. A record of research activity is not proof of safety or effectiveness.
Questions about withdrawal and psychiatric outcomes need their own evidence standard. The page on human clinical signals separates what has been observed in people from what remains difficult to infer.