“What Am I — Qualia, Brahman, Neurons, or just Nothing?”
The Default Mode Network is the neural subsystem that generates our self-referential identity. This node studies its functions in narrative construction, mental time travel, and how its suppression leads to ego-free states of presence.
The DMN is active during self-referential thought, autobiographical memory, and perspective-taking. It constructs the 'narrative self'—the persistent story of 'me'—by connecting past memories with future projections. When we are not engaged in a task, the DMN defaults to self-talk.
Neuroimaging of experienced meditators and subjects under psychedelics reveals a significant decrease in DMN activity and connectivity. Subjectively, this suppression correlates with the dissolution of the boundary between self and world, leaving a state of open, unified presence.
The DMN constructs a personal biography, weaving together memories of the past and projections of the future to maintain a continuous sense of identity. When DMN activity is reduced, the mind stops constructing its history, resting instead in pre-reflective presence.
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