A Finnish researcher has proposed that consciousness might continue to exist even after the brain shuts down, drawing on accounts of near-death experiences (NDEs) reported by cardiac arrest survivors. Pekka Rechardt, the researcher, re-examined a 2025 review of NDE research that noted experiences occurring during periods of severely suppressed or undetectable brain electrical activity. This earlier review, published in the International Review of Psychiatry, found that cortical electrical activity can disappear within 10 to 30 seconds of cardiac arrest, with key brain rhythms critical for consciousness vanishing around 6.5 seconds after arrest.
Rechardt's paper, published in the Journal of Consciousness Studies, suggests that the persistence of coherent awareness during these periods challenges the notion that consciousness is solely dependent on brain function. He highlights that NDEs often retain core elements of awareness, including a sense of presence, vivid sensations, and the ability to perceive events as a unified whole. Rechardt argues that these integrated experiences suggest consciousness may not be entirely reducible to brain activity.
He proposes a framework where consciousness operates from a fourth spatial dimension, allowing information from different brain regions to be synthesized into a single, unified experience. This is analogous to how a viewer can perceive a two-dimensional drawing as a whole from a position above the page. Rechardt also addresses the subjective experience of 'Now,' noting that NDEs, while sometimes featuring unfamiliar scenes or memories, are still experienced as occurring in the present moment. He distinguishes this subjective experience from the mere detection of a physical brain response, relating it to the philosophical 'hard problem' of consciousness.
Rechardt applies this dimensional analogy to death, suggesting that just as destroying a painting does not destroy the observer, the cessation of brain activity might end the connection between the brain and consciousness without annihilating the framework of experience itself. This perspective implies that awareness could potentially continue without sensory input from the body, provided that this framework exists independently of the brain. According to Rechardt, NDEs might offer a glimpse into what lies beyond when life-sustaining bodily functions cease.