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Acta Bio-medica : Atenei Parmensis May 2022The ability to remember dreams can depend on a wide range of factors such as personality, creativity, mental state, cognitive functions as well as somatic symptoms. In...
The ability to remember dreams can depend on a wide range of factors such as personality, creativity, mental state, cognitive functions as well as somatic symptoms. In the course of their studies, medical researchers have demonstrated that about 80% patients, woken up at their Rapid Eye Movement (REM) sleep phase, can remember their own dreams, whereas, in clinical practice, young adults can remember their dreams on their awakenings only once or twice a week. Let us now come to the point: in this study we suggest some hypotheses that could explain the reason why patients suffering from psychosomatic disorders seem to remember dreams much less frequently than healthy individuals.
Topics: Cognition; Dreams; Humans; Mental Recall; Psychophysiologic Disorders; Sleep, REM; Young Adult
PubMed: 35546027
DOI: 10.23750/abm.v93i2.11218 -
Science (New York, N.Y.) Mar 2022How does dopamine, the brain's pleasure signal, regulate the dream stage of sleep?
How does dopamine, the brain's pleasure signal, regulate the dream stage of sleep?
Topics: Dopamine; Dreams; Sleep; Sleep, REM
PubMed: 35239395
DOI: 10.1126/science.abo1987 -
Neuroscience and Biobehavioral Reviews Apr 2023Dreams are often viewed as fascinating but irrelevant mental epihenomena of the sleeping mind with questionable functional relevance. Despite long hours of oneiric... (Review)
Review
Dreams are often viewed as fascinating but irrelevant mental epihenomena of the sleeping mind with questionable functional relevance. Despite long hours of oneiric activity, and high individual differences in dream recall, dreams are lost into oblivion. Here, we conceptualize dreaming and dream amnesia as inherent aspects of the reactive and predictive homeostatic functions of sleep. Mental activity during sleep conforms to the interplay of restorative processes and future anticipation, and particularly during the second half of the night, it unfolds as a special form of non-constrained, self-referent, and future-oriented cognitive process. Awakening facilitates constrained, goal-directed prospection that competes for shared neural resources with dream production and dream recall, and contributes to dream amnesia. We present the neurophysiological aspects of reactive and predictive homeostasis during sleep, highlighting the putative role of cortisol in predictive homeostasis and forgetting dreams. The theoretical and methodological aspects of our proposal are discussed in relation to the study of dreaming, dream recall, and sleep-related cognitive processes.
Topics: Humans; Dreams; Sleep, REM; Sleep; Mental Processes; Amnesia; Mental Recall
PubMed: 36804397
DOI: 10.1016/j.neubiorev.2023.105104 -
Consciousness and Cognition Oct 2022Dream lucidity, the awareness of consciousness in dreams, is linked to functions that support reality monitoring in differentiating between internally and externally...
Dream lucidity, the awareness of consciousness in dreams, is linked to functions that support reality monitoring in differentiating between internally and externally generated memories. However, lucid dreams have been argued to result from thin reality-fantasy boundaries that lead to reality monitoring errors. To examine the relationship between dream lucidity and reality monitoring, we recruited 31 college students to rate their dream lucidity for 7 days and then complete a reality monitoring test in Experiment 1, observing a positive correlation between dream lucidity and reality monitoring. In Experiment 2, 109 participants rated dream lucidity and the memory characteristics of perceived and imagined events. Dream lucidity was negatively correlated with differences in sensory details between the memories of perceived and imagined events. The findings indicate that individuals with high dream lucidity have a superior ability to discriminate between externally and internally generated events that are susceptible to reality monitoring errors.
Topics: Awareness; Cognition; Consciousness; Dreams; Humans; Reality Testing
PubMed: 36183604
DOI: 10.1016/j.concog.2022.103414 -
Chromosome Research : An International... Sep 2022Germline-restricted chromosomes (GRCs) are accessory chromosomes that occur only in germ cells. They are eliminated from somatic cells through programmed DNA elimination... (Review)
Review
Germline-restricted chromosomes (GRCs) are accessory chromosomes that occur only in germ cells. They are eliminated from somatic cells through programmed DNA elimination during embryo development. GRCs have been observed in several unrelated animal taxa and show peculiar modes of non-Mendelian inheritance and within-individual elimination. Recent cytogenetic and phylogenomic evidence suggests that a GRC is present across the species-rich songbirds, but absent in non-passerine birds, implying that over half of all 10,500 bird species have extensive germline/soma genome differences. Here, we review recent insights gained from genomic, transcriptomic, and cytogenetic approaches with regard to the genetic content, phylogenetic distribution, and inheritance of the songbird GRC. While many questions remain unsolved in terms of GRC inheritance, elimination, and function, we discuss plausible scenarios and future directions for understanding this widespread form of programmed DNA elimination.
Topics: Animals; Chromosomes; DNA; Dreams; Germ Cells; Phylogeny; Songbirds
PubMed: 35416568
DOI: 10.1007/s10577-022-09688-3 -
Prospects 2021This article explores how socio-political crises that implicate teachers and students play out in dreams about the psychical and material realities of schooling. Teacher...
This article explores how socio-political crises that implicate teachers and students play out in dreams about the psychical and material realities of schooling. Teacher dreaming during crisis reveals the impossibility of the dream of education - a fantasy of control, protection, and transformation of students. The author analyzes her own teacher fantasies of protecting and transforming students during crisis as they are unfurled in her dreams to be just that, fantasies. The crises of violence and remoteness, as engendered by antisemitism, school fighting, and Covid-19, expose the fissures of this fantasy through the transferential time and ties of teaching. Ultimately, the conflicts that ensue from dreaming during crisis generate possibilities of learning through crisis.
PubMed: 33424037
DOI: 10.1007/s11125-020-09522-w -
Sleep Medicine Jan 2021
Topics: Dreams; Humans; Mental Disorders; Young Adult
PubMed: 33268312
DOI: 10.1016/j.sleep.2020.09.023 -
Sleep Health Aug 2020
Topics: Crutches; Dreams; History, 20th Century; Humans; Paintings; Sleep; Social Class
PubMed: 32654937
DOI: 10.1016/j.sleh.2020.06.006 -
Praxis Apr 2023End-of-Life Dreams and Visions End-of life dreams and visions (ELDVs) or so-called death bed phenomena are transcendent experiences at the end of life that can be...
End-of-Life Dreams and Visions End-of life dreams and visions (ELDVs) or so-called death bed phenomena are transcendent experiences at the end of life that can be visual, auditory and/or kinesthetic, and often include visions of (deceased) loved ones, close friends or perceptions of places, travels, bright lights, or music. ELDVs typically occur weeks to hours prior to death and may comfort the dying and prepare spiritually for the end of life. Such experiences are frequently reported by dying individuals, the prevalence varying between 30 and 80%, but in the clinical context ELDVs are usually neglected, but interpreted and treated as pathological changes in the brain that result in, and from, delirium. This article tries to enlighten the occurrence, the contents and meanings of ELDVs in dying persons as opposed to delirium and night dreams using findings from the literature and from clinical observations. Implications of these conclusions for palliative care and the therapeutic relevance of ELDVs when taking care of dying individuals and their loved ones will also be discussed.
Topics: Humans; Dreams; Palliative Care; Brain; Death; Delirium
PubMed: 37042410
DOI: 10.1024/1661-8157/a004020 -
Der Ophthalmologe : Zeitschrift Der... Mar 2021
Topics: Anti-Bacterial Agents; Cataract Extraction; Dreams; Endophthalmitis; Humans; Postoperative Complications
PubMed: 33666728
DOI: 10.1007/s00347-020-01262-8