Research PNAS · 2004
Lutz et al. — High-Amplitude Gamma Synchrony
Long-term Buddhist meditators, mental practice, large gamma-band oscillations and phase-synchrony. A landmark. Not a 40 Hz headphone preset.
Antoine Lutz, Lawrence L. Greischar, Nancy B. Rawlings, Matthieu Ricard, and Richard J. Davidson reported that long-term practitioners could self-induce high-amplitude gamma synchrony during meditation. The paper is famous. The population is not a first-session user.
Who, where, when
W. M. Keck Laboratory for Functional Brain Imaging and Behavior, University of Wisconsin–Madison, with practitioner-collaborators. PMID 15534199.
What the work actually did
EEG during compassion meditation in experts versus controls. Reports of unusual gamma amplitude and long-distance synchrony. The claim is about trained minds, not about a tone.
What it does not prove
Expertise, tradition, and years of practice are the independent variables. A consumer gamma beat is not this experiment. Do not put Lutz in a sales deck for a 40 Hz file.
How to use this page
If gamma comes up on this site, it is a design band on a stereo instrument. The PNAS paper is about people who already knew how to sit.
Related
Editorial reading of published research. The official paper is authoritative. Not medical advice. Not a claim that consumer audio recreates a trial protocol.