Journal of Neuroscience
May 14, 2025
Çağatay Demirel, Jarrod Gott, Kristoffer Appel et al.
8 citations
Lucid dreaming (LD) is a state of conscious awareness of the ongoing oneiric state, predominantly linked to REM sleep. Progress in understanding its neurobiological basis has been hindered by small sample sizes, diverse EEG setups, and artifacts like saccadic eye movements. To address these challenges in characterizing the electrophysiological correlates of LD, we introduced an adaptive...
PsyArXiv
December 21, 2023
Victoria Amo, Nikolai Godt, Johannes Leugering et al.
preprint
This paper introduces a novel approach to lucid dream communication, leveraging electrooculographical signals for real-time, natural language messaging within dreams. Beyond traditional horizontal eye movement techniques, our methodology incorporates vertical eye movements, enhancing the expressive range of communication. Recognizing the potential for lucid dream communication in diverse...
Current Biology
April 12, 2021
Karen R Konkoly, Kristoffer Appel, Emma Chabani et al.
126 citations
Dreams take us to a different reality, a hallucinatory world that feels as real as any waking experience. These often-bizarre episodes are emblematic of human sleep but have yet to be adequately explained. Retrospective dream reports are subject to distortion and forgetting, presenting a fundamental challenge for neuroscientific studies of dreaming. Here we show that individuals who are asleep...
Consciousness and Cognition
August 1, 2020
Kristoffer Appel, S Füllhase, S Kern et al.
12 citations
Dreams in which the dreamer is aware of the dream state (lucid dreams, LD) are difficult to induce in naïve subjects in-laboratory. Recently, Stumbrys and Erlacher (2014) used a combination of existing induction techniques together with a self-developed experiment protocol and achieved comparatively high LD induction rates. In this study, we simplified their methodology slightly and repeated...
Psychology of Consciousness Theory Research and Practice
April 13, 2020
Michelle Carr, Karen R Konkoly, Remington Mallett et al.
44 citations
Previous experiments combining cognitive techniques and sleep disruption have been relatively successful in inducing at-home lucid dreams over training periods of 1-week or more.Here, we induce lucid dreams in a single laboratory nap session by pairing cognitive training with external stimulation.Participants came to the laboratory at 7:30 am or 11:00 am and during polysomnography setup were...
April 3, 2018
Kristoffer Appel, Gordon Pipa, Martin Dresler
During dreaming, we experience a wake-like hallucinatory reality, however with restricted reflective abilities: in the face of a bizarre dream environment, we do not realize that we are actually dreaming. In contrast, during the rare phenomenon of lucid dreaming, the dreamer gains insight into the current state of mind while staying asleep. This metacognitive insight often enables the dreamer...