Neuroscience & Biobehavioral Reviews
March 14, 2019
Benjamin Baird, Sérgio Mota‐rolim, Martin Dresler
196 citations
Lucid dreaming is becoming aware that one is dreaming while still asleep. This review of neuroscientific studies—including electroencephalographic, neuroimaging, brain lesion, pharmacological, and brain stimulation research—finds that evidence is limited and often mixed. Electroencephalographic studies are mostly underpowered and show inconsistent results. Neuroimaging data are scant but suggest involvement of prefrontal and parietal regions. Combining mental-set training with cholinergic stimulation shows promise for inducing lucid dreams, while electrical brain stimulation's effectiveness remains unclear. The review also covers best-practice measurement strategies for sleep laboratories. Lucid dreaming has clinical and scientific applications, especially for studying consciousness, but further research with larger samples and refined methods is needed.
Journal of Cognitive Neuroscience
April 17, 2014
Benjamin Baird, Jonathan Smallwood, Antoine Lutz et al.
169 citations
When the mind wanders, the brain's response to sensory input becomes less consistent from one moment to the next, particularly in theta-band oscillations over parietal regions. Using an experience sampling method with continuous EEG, the authors found that task-unrelated thought reduced the P1 event-related potential, replicating prior work. Time-frequency analysis showed decreased theta-band phase-locking, indicating lower temporal fidelity in the brain's response to stimuli. Additionally, mind-wandering required more cortical processing to re-engage with a task. These results suggest that attentional states shape neural processing of sensory input by affecting the consistency of oscillatory responses.
Scientific Reports
March 26, 2019
Minji Lee, Benjamin Baird, Olivia Gosseries et al.
98 citations
During non-rapid eye movement sleep, conscious experiences are linked to reduced phase-locking at low frequencies (<4 Hz) and lower transitivity and clustering coefficient in delta and theta bands compared to unconsciousness, especially over parietal-occipital regions. No significant differences in Granger-causality patterns between frontal and parietal areas were found. These findings suggest that decreased local connectivity at low frequencies in posterior brain regions may indicate consciousness during sleep.
Journal of Cognitive Neuroscience
May 31, 2017
Lampros Perogamvros, Benjamin Baird, Mitja Seibold et al.
76 citations
Spontaneous thoughts occur during wakefulness, NREM sleep, and REM sleep, and all share activation in the midcingulate cortex. Waking thoughts additionally involve a medial prefrontal region linked to metacognition and have more metacognitive content than sleep thoughts. REM sleep thoughts are more social in content. The findings suggest a core neural substrate for thoughts across behavioral states, with medial prefrontal regions contributing to metacognitive qualities during wake.
Scientific Reports
December 6, 2018
Benjamin Baird, Anna Castelnovo, Olivia Gosseries et al.
74 citations
People who have frequent lucid dreams—three or more per week—show stronger functional connections between the left anterior prefrontal cortex and several brain regions, including the angular gyrus, middle temporal gyrus, and inferior frontal gyrus, compared to people who rarely or never lucid dream. These connections involve areas that are normally less active during sleep. No differences in brain structure were found. The findings suggest that frequent lucid dreaming is linked to how certain brain networks communicate, not to structural differences.
PLoS ONE
August 8, 2018
Stephen LaBerge, Kristen Lamarca, Benjamin Baird
59 citations
Taking galantamine, a drug that boosts the brain chemical acetylcholine, significantly increases the chance of having a lucid dream—a dream where the dreamer knows they are dreaming. In a study of 121 people interested in lucid dreaming, 14% reported a lucid dream after a placebo, compared to 27% after a 4 mg dose and 42% after an 8 mg dose. The drug also improved dream recall, sensory vividness, and complexity. Lucid dreams themselves were more vivid, clear, controlled, and emotionally positive than non-lucid dreams. Combining galantamine taken in the last third of the night with a brief awakening and a focused mental technique is one of the most effective ways to induce lucid dreams.
Sleep
April 11, 2022
Benjamin Baird, Giulio Tononi, Stephen LaBerge
41 citations
Lucid dreaming is not a hybrid state mixing sleep and wakefulness, as previously claimed based on increased 40 Hz brain activity. The apparent rise in frontolateral 40 Hz power during lucid REM sleep is actually an artifact caused by saccadic spike potentials from heightened eye movement density. In a reanalysis of 14 signal-verified lucid dreams from six participants, lucid REM sleep showed higher REM density than baseline REM sleep, but no difference in 40 Hz power after removing the spike potential artifact. Lucid REM also showed small reductions in low-frequency and beta band power and increased signal complexity, all within normal REM sleep variation. Lucid dreams involve higher physiological activation, including subcortical and cortical measures.
Psychology of consciousness (Washington, D.C.)
March 1, 2019
Benjamin Baird, Brady A Riedner, Melanie Boly et al.
41 citations
Lucid dreaming occurs more often in long-term meditators than in people who do not meditate. Among non-meditators, lucid dream frequency is linked to the ability to put experience into words, while among meditators it is linked to observing and decentering aspects of mindfulness. However, an 8-week mindfulness course did not increase lucid dream frequency. The findings suggest a continuity between awareness during waking and sleeping states and connect meditation training with meta-awareness, but the precise nature of the link remains unclear.
May 16, 2023
William Wong, Kátia C. Andrade, Thomas Andrillon et al.
21 citations
preprint
A new open-access database, DREAM, combines sleep magneto/electroencephalography (M/EEG) recordings with standardized dream reports to enable large-scale neurocognitive research on dreaming. The initial release includes 20 datasets from 561 participants and 2649 awakenings, each with at least 20 seconds of high-frequency M/EEG data and a classification of the subject's experience. Analyses demonstrate that features extracted from EEG can predict whether a person reports having had a conscious experience during both REM and NREM sleep. The database aims to overcome the limitations of small sample sizes and methodological variability in dream research, allowing new questions to be addressed at a scale unattainable by individual labs.
Consciousness and cognition
January 1, 2022
Benjamin Baird, Mariel Kalkach Aparicio, Tariq Alauddin et al.
17 citations
Spontaneous episodic thoughts about the past and future are common during waking but rarely occur during N2 or REM sleep. Analysis of thought reports from 138 participants who underwent experience-sampling while awake and serial awakenings during sleep shows that waking spontaneous thought frequently includes autobiographical planning with a strong bias toward the future. In contrast, dreaming sleep states rarely feature such mental time travel. This suggests that human consciousness differs substantially across the sleep-wake cycle in how it typically engages with episodic past and future events.
Trends in cognitive sciences
June 1, 2021
Benjamin Baird, Stephen LaBerge, Giulio Tononi
13 citations
Lucid dreamers can use eye movements to report on their dream content in real time during REM sleep, challenging the long-held belief that dreamers are completely isolated from the outside world. Sensory input is not entirely suppressed during sleep. A recent study by Konkoly et al. demonstrates that experimenters can question lucid dreamers during ongoing dreams and explores the feasibility of more extended two-way communication during lucid REM sleep dreaming.
Nature communications
August 13, 2025
William Wong, Rubén Herzog, Kátia Cristine Andrade et al.
10 citations
A new open database, the DREAM database, combines standardized sleep magneto/electroencephalography (M/EEG) recordings with dream reports from 505 participants across 20 datasets, totaling 2,643 awakenings. Each awakening includes at least 20 seconds of high-resolution sleep EEG (≥100 Hz, ≥2 electrodes) and a classification of the sleeper's reported experience. Analyses showed that reports of conscious experiences during sleep can be predicted from objective EEG features in both REM and NREM sleep. The database aims to overcome limitations of small sample sizes and methodological variability in dream research, enabling larger-scale investigations of the neurocognitive basis of dreaming.
Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
July 1, 2019
Minji Lee, Benjamin Baird, Olivia Gosseries et al.
4 citations
Cortical networks show differences in functional integration and segregation across states of consciousness, but not in overall connectivity. In the beta frequency band, functional integration during wakefulness exceeded that during NREM sleep. In the theta band, functional segregation (transitivity and clustering coefficient) was stronger in NREM sleep without conscious experience than in wakefulness or REM sleep, while the opposite pattern appeared in the beta band. No significant differences in the weighted phase lag index were found among wakefulness, REM sleep with conscious experience, NREM sleep with conscious experience, and NREM sleep without conscious experience. These findings may relate to cortical bistability and contribute to understanding neural correlates of consciousness.
Brain Sci
May 14, 2024
Elena Gerhardt, Benjamin Baird
3 citations
Lucid dreaming—becoming aware that one is dreaming—shares features with mindfulness, the moment-to-moment awareness of experience, and with meta-awareness, the ability to notice the current content of one's own mental state. An online survey of 635 people found that daily frequent meditators report more lucid dreams than non-frequent meditators, but weekly frequent meditators do not. Open monitoring styles of meditation are positively associated with lucid dreaming. Meta-awareness is higher among meditators and weekly lucid dreamers. Frequent lucid dreaming is also linked to a non-reactive stance and experiences of transcendence. The findings indicate a positive relationship between specific meditation practices and lucid dreaming, and highlight meta-awareness as a cognitive process connecting meditation, mindfulness, and lucid dreaming.