Richard R. Davidson and others used fMRI with 256 channel EEG for Decoding Depth of Meditation, as for instance in this PNAS paper published in 2004 Long-term meditators self-induce high-amplitude gamma synchrony during mental practice https://www.pnas.org/doi/10.1073/pnas.0407401101 what is shortly reviewed in this video: We now found a paper on Google Scholar published in 2024: Decoding …