Sleep
November 16, 2023
Péter Simor, Bertalan Polner, Noémi Báthori et al.
9 citations
Mind-wandering is a mental state in which attention shifts from the present environment or current task to internally driven, self-referent mental content. Homeostatic sleep pressure seems to facilitate mind-wandering as indicated by studies observing links between increased mind-wandering and impaired sleep. Nevertheless, previous studies mostly relied on cross-sectional measurements and...
Sleep
May 29, 2023
Stephanie Hart, Lauren Tobias
Abstract Introduction Narcolepsy and Parkinson’s disease (PD) share many similar symptoms. Narcolepsy is characterized by excessive daytime sleepiness, sleep attacks, sleep paralysis, and hallucinations, with or without cataplexy. Hypnagogic hallucinations occur while falling asleep and the person experiencing them typically knows they are not real. Here, we present a case of hypnagogic...
Sleep
May 1, 2023
Afik Faerman, Lauren Anker, Kirsten Cherian et al.
5 citations
Abstract Introduction Ibogaine is an indole alkaloid traditionally used in spiritual and healing rites in some African cultures. Ibogaine is primarily studied in the context of substance dependence, but indications suggest it may enhance recovery from trauma. Here, we investigated the effects of ibogaine treatment for multisystem effects of exposure to repeated blasts and combat on...
Sleep
April 12, 2023
Claudia Picard-Deland, Karen R Konkoly, Rachel Raider et al.
Memories of waking-life events are incorporated into dreams, but their incorporation is not uniform across a night of sleep. This study aimed to elucidate ways in which such memory sources vary by sleep stage and time of night. Twenty healthy participants (11 F; 24.1 ± 5.7 years) spent a night in the laboratory and were awakened for dream collection approximately 12 times spread across early,...
Sleep
July 11, 2022
Claudia Picard-Deland, Max-Antoine Allaire, Tore Nielsen
5 citations
Early research suggests that the vestibular system is implicated in lucid dreaming, e.g. frequent lucid dreamers outperform others on static balance tasks. Furthermore, gravity-themed dreams, such as flying dreams, frequently accompany lucid dreaming. Nonetheless, studies are scarce. We attempted to: (1) replicate previous findings using more sensitive static balance measures and (2) extend...
Sleep
May 25, 2022
Maurice Ohayon, Amir Pakpour, Marie Lise Cote
Abstract Introduction Hypnagogic hallucinations are vivid hallucinations that occur at sleep onset, during the transition between wakefulness and REM sleep. The hallucinations can be visual, auditory, tactile or kinetic and can be terrifying for the individual who experience them. Hypnagogic hallucinations are a common symptom of narcolepsy, a disorder characterized by excessive sleepiness,...
Sleep
April 11, 2022
Benjamin Baird, Giulio Tononi, Stephen LaBerge
41 citations
(1) To critically test whether a previously reported increase in frontolateral 40 Hz power in lucid REM sleep, used to justify the claim that lucid dreaming is a "hybrid state" mixing sleep and wakefulness, is attributable to the saccadic spike potential (SP) artifact as a corollary of heightened REM density. (2) To replicate the finding that lucid dreams are associated with physiological...
Sleep
November 12, 2021
Monika Kliková, Marek Piorecký, Eva Miletínová et al.
Recurrent isolated sleep paralysis (RISP) is a rapid eye movement (REM) parasomnia characterized by a dissociative state with characteristics of REM sleep and wakefulness. Pathophysiology has not yet been clarified and very little research has been performed using objective polysomnographic measures with inconsistent results. The main aim of our study was to find whether higher REM sleep...
Sleep
May 14, 2021
Laura Sophie Imperatori, Jacinthe Cataldi, Monica Betta et al.
30 citations
Functional connectivity (FC) metrics describe brain inter-regional interactions and may complement information provided by common power-based analyses. Here, we investigated whether the FC-metrics weighted Phase Lag Index (wPLI) and weighted Symbolic Mutual Information (wSMI) may unveil functional differences across four stages of vigilance-wakefulness (W), NREM-N2, NREM-N3, and REM sleep-with...
Sleep
May 3, 2021
Chloe Wills, Kathryn Kennedy, Célyne Bastien et al.
Abstract Introduction During the COVID-19 pandemic, individuals have faced unprecedented events, which are often stressful. Stress has an important impact on dreams, and stress-induced sleep difficulties may also impact dream recall. The present study evaluated associations between sleep, stress and dream content on dream recall during the pandemic. Methods A sample of N=419 US adults completed...
Sleep
May 3, 2021
Jason Rakita, Brooke Judd
Abstract Introduction The presence of hypnopompic hallucinations raises concerns for narcolepsy. However, sleep-related hallucinations may occur in other settings. Dreams at sleep-wake transitions may be difficult for patients to differentiate from sleep-related hallucinations. Sleep-related hallucinations are predominantly visual, although they can be auditory, tactile and/or kinetic. However,...
Sleep
May 1, 2021
Tommy Begay, Dora Valencia, Sadia Ghani et al.
Abstract Introduction The COVID-19 pandemic has impacted individuals in many ways, including anecdotal reports of nightmares. However, little data exists regarding the experience of COVID-related nightmares, especially among the distressed population at the US-Mexico Border. This is especially relevant given the clinical importance of nightmares as risk factors for poor mental health and sleep...
Sleep
December 14, 2020
Raphael Vallat, Alain Nicolas, Perrine Ruby
Why do some individuals recall dreams every day while others hardly ever recall one? We hypothesized that sleep inertia-the transient period following awakening associated with brain and cognitive alterations-could be a key mechanism to explain interindividual differences in dream recall at awakening. To test this hypothesis, we measured the brain functional connectivity (combined...
Sleep
November 27, 2020
Jessica R. Dietch, Daniel J. Taylor, Kristi E. Pruiksma et al.
STUDY OBJECTIVES Nurses are a group at high risk for nightmares, yet little is known about the rate of nightmare disorder and associated psychosocial factors in this group in part attributable to the lack of a self-report questionnaire to assess DSM-5 criteria for nightmare disorder. Aims of the current study were to 1) report on development and initial validity of a self-report measure of...
Sleep
September 4, 2020
R. Bottary, G. Simonelli, T. Cunningham et al.
The Coronavirus Disease 2019 (COVID-19) pandemic has dra-matically impacted the lifestyle of individuals across the globe. In many countries, nationally instituted shelter-in-place orders and closures of non-essential businesses have left many without employment and have forced others to work from home. These policy shifts have changed or removed the socially- and occupa-tionally imposed...
Sleep
August 12, 2020
Carlo Cipolli, Fabio Pizza, Claudia Bellucci et al.
To assess the frequency of dream experience (DE) developed during naps at Multiple Sleep Latency Test (MSLT) by patients with narcolepsy type 1 (NT1) and establish, using story-grammar analysis, the structural organization of DEs developed during naps with sleep onset rapid eye movement (REM) period (SOREMP) sleep compared with their DEs during early- and late-night REM sleep. Thirty drug-free...
Sleep
May 27, 2020
M Gross, R Patel, S W Schwartz et al.
Abstract Introduction In the James A. Haley Veterans Administration (JAHVA) Vista database, the ICD-9 code 307.47 for Nightmare disorder (ND) is infrequently used and appears independently of codes for PTSD. We wanted to determine if certain drugs that may affect sleep are associated with ND. Methods All patients with ND visiting JAHVA between 2007 and 2011 were selected along with control...
Sleep
May 27, 2020
P Zendels, S Barngrover, H Peach
Abstract Introduction Nightmares can cause poorer sleep quality. Various mechanisms have been explored as potential treatments for nightmares, including mindfulness practices and lucid dreaming. Presently, little literature has looked at the interaction effects between mindfulness and lucid dreaming to reduce nightmare distress. Methods A sample of 275 individuals was recruited from both the...
Sleep
January 13, 2020
Borbála Blaskovich, Richárd Reichardt, Ferenc Gombos et al.
Frequent nightmares have a high prevalence and constitute a risk factor for psychiatric conditions, but their pathophysiology is poorly understood. Our aim was to examine sleep architecture and electroencephalographic markers-with a specific focus on state transitions-related to sleep regulation and hyperarousal in participants with frequent nightmares (NM participants) versus healthy controls....
Sleep
June 11, 2019
Kiyohide Usami, Anna Korzeniewska, Riki Matsumoto et al.
Wakefulness and sleep arise from global changes in brain physiology that may also govern the flow of neural activity between cortical regions responsible for perceptual processing versus planning and action. To test whether and how the sleep/wake cycle affects the overall propagation of neural activity in large-scale brain networks, we applied single-pulse electrical stimulation (SPES) in...
Sleep
December 13, 2018
Dan Denis, Giulia Poerio, Sarah Derveeuw et al.
25 citations
Exploding head syndrome is a sensory parasomnia characterized by the perception of loud noises and/or a sense of explosion in the head that occurs when transitioning to or from sleep. Despite receiving little attention from both researchers and clinicians, studies suggest that approximately 10%-15% of individuals have episodes, with significant levels of fear occurring in a subset of cases....
Sleep
August 1, 2017
Kiyohide Usami, Riki Matsumoto, Katsuya Kobayashi et al.
To investigate the changes in cortical neural responses induced by external inputs during phasic rapid eye movement (p-REM) sleep. Single-pulse electrical stimulation (SPES) was directly applied to the human cortex during REM sleep through subdural electrodes, in seven patients who underwent invasive presurgical evaluation for intractable partial epilepsy. SPES was applied to parts of the...
Sleep
April 30, 2015
Michael Rak, P. Beitinger, Axel Steiger et al.
56 citations
STUDY OBJECTIVE: Nightmares are a frequent symptom in narcolepsy. Lucid dreaming, i.e., the phenomenon of becoming aware of the dreaming state during dreaming, has been demonstrated to be of therapeutic value for recurrent nightmares. Data on lucid dreaming in narcolepsy patients, however, is sparse. The aim of this study was to evaluate the frequency of recalled dreams (DF), nightmares (NF),...
Sleep
February 27, 2015
Pauline Dodet, Mario Chávez, Smaranda Leu-Semenescu et al.
115 citations
OBJECTIVE: To evaluate the frequency, determinants and sleep characteristics of lucid dreaming in narcolepsy. SETTINGS: University hospital sleep disorder unit. DESIGN: Case-control study. PARTICIPANTS: Consecutive patients with narcolepsy and healthy controls. METHODS: Participants were interviewed regarding the frequency and determinants of lucid dreaming. Twelve narcolepsy patients and 5...
Sleep
August 29, 2014
Jason C Ong, Rachel Manber, Zindel V. Segal et al.
338 citations
STUDY OBJECTIVES: To evaluate the efficacy of mindfulness meditation for the treatment of chronic insomnia. DESIGN: Three-arm, single-site, randomized controlled trial. SETTING: Academic medical center. PARTICIPANTS: Fifty-four adults with chronic insomnia. INTERVENTIONS: Participants were randomized to either mindfulness-based stress reduction (MBSR), mindfulness-based therapy for insomnia...