Dr. Zirui Huang's study suggests that the shifting balance between the Default Mode Network (DMN)
and the Dorsal Attention network (DAT) of the brain may be a defining feature of consciousness.
Disrupted Global Brain Signaling During Unconsciousness
New fMRI study by Tanabe et al. published in the March 2020 issue of the journal Anesthesiology suggests that the global temporal coordination of neuronal activity across the entire brain is a unitary indicator of various states of consciousness including sleep, general anesthesia, and unresponsive wakefulness syndrome, whereas the relationship of the global and local brain activity defines the particular quality of each unconscious state.
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Neural Correlates of Shamanic State of Consciousness