We argue that diffusion-based action models provide the structural prerequisites for minimal self-awareness in humanoid robots in a way that standard reactive feedforward policies do not. Three major theories of self-awareness—Friston’s Free Energy Principle (Friston, 2010), Metzinger’s Phenomenal Self-Model Theory (Metzinger, 2003), and Damasio’s two-level self (Damasio,...
Distressing dreams or nightmares about a traumatic experience are common among trauma-exposed individuals and contribute to the maintenance of posttraumatic stress disorder (PTSD) symptoms. Like other intrusive reexperiencing symptoms, trauma-related nightmares are characterized by vivid sensory details and heightened emotional intensity. However, little is known about their underlying...
Nightmares are overrepresented in psychiatric disorders and are strongly associated with suicidality, especially in Major Depressive Episode (MDE). This study had two main objectives: (1) to determine an optimal diagnostic cutoff for the Nightmare Severity Index (NSI) to identify Nightmare Disorder (ND), and (2) to compare the clinical profiles of MDE patients with ND (MDE-ND) and without ND...
Lucid dreaming, defined as the experience of becoming aware of dreaming while dreaming, offers a unique window into a state of consciousness characterised by a blending of the sensory vividness of REM sleep with the self-awareness of wakefulness. While past functional imaging has shed light on the neural activity supporting lucid dreaming, the structural brain correlates of lucid dream...
Dreaming during anaesthesia has been documented for over a century, yet it remains poorly understood. This scoping review synthesises evidence on the frequency, phenomenology, predictors, outcomes, and neural correlates of anaesthesia dreaming. We systematically searched multiple databases for studies examining anaesthesia dreaming, including clinical trials, observational studies, and...
Why do humans produce dysphoric dreams and nightmares at all? This paper develops a cautious evolutionary theory of unpleasant dreaming by extending the logic of evolutionary psychiatry to dream life. Research on dream continuity suggests that dreams are not detached from waking mental life, but instead reflect current concerns, emotional preoccupations, memory fragments, and bodily states....
The prevalence of nightmares appears to be highly variable in this current literature on nightmares, ranging from low in healthy populations (6% to 11%), to slightly higher in those with medical problems (12% to 13%), significantly higher in individuals with neurological conditions (24% to 30%) and again significantly higher in those with psychiatric diagnoses (27% to 62%). Medical...
Nightmares are common after sexual assault and may play an important role in the development of posttraumatic stress disorder (PTSD). However, little research has examined daily temporal associations between nightmares and PTSD symptoms in the acute aftermath of sexual assault. Ecological momentary assessment (EMA) was used to test within- and between-person associations between nightmares and...