Brain sources of EEG gamma frequency during volitionally meditation-induced, altered states of consciousness, and experience of the self
Psychiatry Research Neuroimaging November 1, 2001 Dietrich Lehmann, P.L Faber, Peter Achermann et al. 212 citations
EEG recordings from an advanced meditator showed that different meditation states—visualization, verbalization, and dissolution of self—activate distinct brain regions. Gamma-band (35–44 Hz) activity patterns differed significantly across four meditations. Visualization engaged the right posterior brain, verbalization the left central area, and self-dissolution involved right fronto-temporal regions. These findings align with known functional neuroanatomy and are discussed in relation to self-representation, reality testing, depersonalization disorders, and brain lesions.