Every night, while the world falls asleep, the brain gets to work in ways that still defy scientific understanding. We dream. And inside those dreams — in that space which the contemplative traditions of every culture have regarded as a doorway to other dimensions of being — processes of extraordinary complexity unfold: memory consolidation, emotional processing, neuronal reorganization. But there is one phenomenon, within the dream itself, that in recent years has captured the attention of neuroscientists, psychologists and consciousness researchers with unprecedented intensity: lucid dreaming.
A lucid dream is one in which the dreamer becomes aware that they are dreaming, while remaining inside the dream. Those who experience it regularly describe the sensation as a sudden and vivid expansion of consciousness: the dream landscape remains intact, but within it the dreamer can move with a form of freedom and intentionality that in waking life we call volition. Advanced practitioners report being able to alter the narrative of the dream, transform the environment, experience flight, or interact deliberately with dream figures.
For centuries this phenomenon remained in the domain of subjective experience and spiritual tradition — lucid dreaming is central to practices such as Tibetan Dream Yoga and certain currents of Sufi meditation. Today, neuroimaging and electroencephalography are beginning to map its biological foundations, with results that open fundamental questions about the very nature of consciousness.
A 2025 study conducted by neuroscientist Martin Dresler's laboratory at Radboud University in the Netherlands identified a distinctive pattern of brain activity in lucid dreams: heightened and more widespread communication between different brain regions, with elevated alpha wave connectivity in posterior areas compared to ordinary REM sleep. In simpler terms: the brain of a lucid dreamer resembles, in certain respects, that of someone who is awake and aware — even though the body is motionless and the eyes are closed.
This discovery is not merely technically fascinating. It is philosophically disruptive. It suggests that consciousness — that capacity to be "present to oneself" — is not rigidly tied to the waking state, but can manifest even at the heart of sleep. An idea that Eastern contemplative traditions had been defending for millennia, and that science is now beginning to explore with its own tools.
But what exactly happens in the brain during dreaming, lucid or otherwise? The REM phase — Rapid Eye Movement — is the one in which dreaming is most intense. In this state, cholinergic and dopaminergic activity is elevated, the visual centers are activated, and external sensory input is drastically reduced. The dorsolateral prefrontal cortex — the seat of rational thought and metacognition — is normally suppressed during REM sleep. This explains why ordinary dreams are so devoid of critical judgment: we accept, without surprise, scenarios that would be impossible in waking life.
In lucid dreaming, something changes: this prefrontal region comes partially back online — enough to allow reflective awareness, the recognition that "I am dreaming" — without interrupting the dream itself. It is an exquisitely delicate neural balance, a kind of double consciousness.
Research has also shown that dreaming influences spirituality in daily life. A study published in 2025 in the peer-reviewed journal Frontiers in Psychology examined the link between dream content — specifically the presence of "supernatural agents," that is, figures endowed with extraordinary qualities — and participants' daily measures of spirituality. The findings indicate that encounters with such figures in dreams, facilitated by the heightened cerebral plasticity of the REM phase, tend to intensify the sense of spiritual connection in the hours following waking.
From an applied perspective, lucid dreaming is emerging as a potential therapeutic tool. Researchers at the University of Texas at Austin have studied the use of galantamine — a drug normally used for cognitive impairments — as an enhancer of dream lucidity, finding an increase in lucid dream frequency of up to 42% compared to placebo. In parallel, non-pharmacological techniques are being explored: transcranial electrical stimulation, augmented reality approaches, and specific behavioural induction protocols.
The interest extends well beyond the laboratory. New technologies make it possible to monitor brain parameters during sleep with increasingly sophisticated wearable devices, opening the way for real-time interventions — such as calibrated sound or light stimuli designed to facilitate the transition toward dream lucidity.
What is most compelling about all this research is the implicit dialogue it opens with ancient wisdom traditions. The dream as a space for inner transformation, as a laboratory of consciousness, as a place where the boundary between the self and the greater whole grows thin: these are not new ideas. They are old ideas that science is learning, with growing humility and wonder, to take seriously.