1209 results for "Consciousness"
'I love you': the first phrase detected from dreams.
Sleep science (Sao Paulo, Brazil) – January 01, 2022
Summary
Lucid dreaming may unlock the secrets of our subconscious. In a study involving four lucid dream practitioners, facial muscle activity was recorded while they vocalized the phrase "I love you" both awake and during dreams. Remarkably, all participants successfully demonstrated this at least once. Specific patterns emerged: the word "I" consistently activated muscles in the submentalis area, while "you" triggered activity in the orbicularis oris. These findings suggest that decoding dream speech could become possible, paving the way for an artificial EMG language in lucid states.
Abstract
Many people have dreams nightly and some maintain consciousness during dreams. Such dreams are referred to as lucid dreams (LD). During dreams, our...
A qualitative and quantitative account of patient's experiences of ketamine and its antidepressant properties.
Journal of psychopharmacology (Oxford, England) – August 01, 2021
Summary
Participants in a study on ketamine for major depressive disorder reported profound changes in perspective and emotional well-being. Out of 32 volunteers, all experienced perceptual shifts, with key themes emerging around spirituality and unity during their psychedelic experiences. Notably, greater reductions in depression scores were linked to these altered states. Follow-up interviews revealed lasting effects, including an uplifting “psychedelic afterglow” that transformed how individuals viewed life and their mental health. This highlights the significant role of ketamine's psychedelic properties in its antidepressant effects.
Abstract
Ketamine is central to one of the most rapidly growing areas of neuroscientific research into novel treatments for depression. Limited research has...
LSD, madness and healing: Mystical experiences as possible link between psychosis model and therapy model.
Psychological medicine – March 01, 2023
Summary
Psychedelics like LSD can mimic psychotic experiences while also offering therapeutic benefits. In a study involving 24 healthy volunteers, LSD (50 μg) induced significant mystical experiences and ego-dissolution, correlating with increased aberrant salience (highly linked to complex imagery) and suggestibility. Notably, LSD did not enhance mindfulness. The findings suggest that the therapeutic potential of psychedelics may hinge on the meaning attributed to these mystical experiences, indicating that psychedelic-assisted therapy could be more effective when incorporating suggestions that foster such experiences.
Abstract
For a century, psychedelics have been investigated as models of psychosis for demonstrating phenomenological similarities with psychotic experience...
Effectiveness of a Mindfulness Meditation App Based on an Electroencephalography-Based Brain-Computer Interface in Radiofrequency Catheter Ablation for Patients With Atrial Fibrillation: Pilot Randomized Controlled Trial.
JMIR mHealth and uHealth – May 03, 2023
Summary
Patients with atrial fibrillation undergoing radiofrequency catheter ablation experienced significantly less discomfort when using a mindfulness meditation app. In a pilot randomized controlled trial involving 84 patients, those using the app reported lower pain (mean 4.6 vs. 5.7), anxiety (mean 36.7 vs. 42.3), and fatigue (mean 3.4 vs. 4.7) scores compared to conventional care. Additionally, the app group required less fentanyl (mean 3.96 mcg/kg vs. 4.85 mcg/kg). The intervention also resulted in fewer adverse events, highlighting its potential benefits in clinical practice.
Abstract
Radiofrequency catheter ablation (RFCA) for patients with atrial fibrillation (AF) can generate considerable physical and psychological discomfort ...
The Challenging Experience Questionnaire: Characterization of challenging experiences with psilocybin mushrooms
Journal of Psychopharmacology – November 18, 2016
Summary
Challenging experiences with the hallucinogen psilocybin, often called "bad trips," involve distinct psychological distress. Clinical psychology research, vital for Psychiatry and Psychedelics and Drug Studies, identified seven key factors: grief, fear, death, insanity, isolation, physical distress, and paranoia. These factors profile the acute adverse feelings and mood shifts during such experiences. This work, pertinent to Complementary and Alternative Medicine Studies, enhances our understanding of anxiety and other challenging aspects of psilocybin use, informing future drug studies in Psychology, including those exploring Cannabis and Cannabinoid Research.
Abstract
Acute adverse psychological reactions to classic hallucinogens (“bad trips” or “challenging experiences”), while usually benign with proper screeni...
Harnessing psilocybin: antidepressant-like behavioral and synaptic actions of psilocybin are independent of 5-HT2R activation in mice
Proceedings of the National Academy of Sciences – April 13, 2021
Summary
Psilocybin, a potent hallucinogen, rapidly acts as an antidepressant, strengthening neural connections in regions like the Hippocampus. Neuroscience and Psychology insights, from Psychedelics and Drug Studies, suggest its Pharmacology may not require altered perception. In a study involving 80 mice, using Ketanserin to modulate Serotonin 5-HT2A receptors, beneficial actions against Anhedonia were observed, with a 35% reduction in depressive-like behaviors. This advancement in Chemical synthesis and alkaloids could accelerate psilocybin's integration into Medicine, influencing Neurotransmitter Receptor Influence on Behavior for Antidepressant therapy.
Abstract
Significance Psychedelic compounds, such as psilocybin, have beneficial actions in several psychiatric diseases. They also produce strong alteratio...
Effects of psilocybin on time perception and temporal control of behaviour in humans
Journal of Psychopharmacology – May 20, 2006
Summary
Hallucinogenic psilocybin profoundly distorts our sense of time. Twelve volunteers given psilocybin (up to 250μg/kg) objectively struggled with time perception, unable to reproduce or synchronize intervals exceeding 2.5 seconds. This impact on cognition and temporal processing, central to psychology and neuroscience, was accompanied by impaired working memory. These psychedelics and drug studies reveal the serotonin system selectively governs longer duration perception and voluntary movement speed, offering new insights into how this hallucinogen alters perception, including aspects relevant to audiology and music perception.
Abstract
Hallucinogenic psilocybin is known to alter the subjective experience of time. However, there is no study that systematically investigated objectiv...
How does it feel to be on psilocybin? Dose-response relationships of subjective experiences in humans
OpenAlex – June 11, 2020
Summary
Higher doses of psilocybin, the potent hallucinogen, reliably intensify subjective psychological experiences. A comprehensive meta-analysis established a clear positive correlation between oral psilocybin dosage and ratings on scales like the Mystical Experience Questionnaire and Hallucinogen Rating Scale. This finding is vital for clinical psychology and psychiatry, guiding psychedelic use in therapeutic contexts. This work, relevant to drug studies and complementary medicine, helps standardize expected drug experiences in controlled settings, informing future research on chemical synthesis and alkaloids.
Abstract
Abstract Psilocybin is the active component of magic mushrooms and is well known for its psychoactive properties. Different questionnaires have bee...
Psychedelics and Psychotherapy: Is the Whole Greater than the Sum of its Parts?
Clinical Pharmacology & Therapeutics – October 05, 2023
Summary
The potential of psychedelics like psilocybin and mescaline for conditions such as anxiety is compelling, driving new clinical trials in psychiatry. These hallucinogens influence neurotransmitter receptors, but it's unclear if their benefits truly synergize with psychological support from a psychotherapist. Rigorous 2x2 factorial clinical trials are crucial. These drug studies, vital for clinical psychology, will precisely evaluate the individual and combined effects of psilocybin and psychotherapy, informing future chemical synthesis of alkaloids and ensuring cost-effective, safe treatments.
Abstract
Clinical trials of psychedelics have provided support for their potential efficacy and safety. Although most combined a psychedelic with psychologi...
Regional Specificity of the Cingulate Cortex Thickness Association with the Intensity of Psilocybin Experience: A Replication Study
OpenAlex – September 25, 2025
Summary
Individual responses to psychedelics are profoundly shaped by brain structure. In a drug study involving 25 participants, a robust anterior-posterior gradient in cingulate cortex thickness strongly predicted the global intensity of psilocybin's effects (r = 0.549). General cingulate thickness also correlated with the balance between anxiety and visionary states (r = 0.495). This structural organization, crucial for understanding how alkaloids like psilocybin (often from chemical synthesis) influence behavior via neurotransmitter receptors, offers a neuroanatomical marker for personalized psychedelic therapy.
Abstract
Abstract Rationale: Individual variability in psilocybin response is a major challenge for psychedelic-assisted therapy, with structural brain feat...
Preliminary validation and refinement of the psychedelic aesthetic experience questionnaire
Frontiers in Psychology – September 15, 2025
Summary
Vivid aesthetic experiences during psychedelic use can predict improvements in well-being. A new questionnaire, the PAEQ, was validated with 365 psilocybin users, revealing four dimensions: sensory, affective, semantic, and flow. The PAEQ demonstrated high reliability (α=0.90) and strong correlations with existing measures (e.g., r=0.69). This tool advances Psychedelics and Drug Studies by quantifying Aesthetic Perception and Analysis, linking profound experiences to better sleep, reduced anxiety, and improved quality of life.
Abstract
Introduction Aesthetic experiences under psychedelics are often described as vivid, emotionally powerful, and meaningful, yet they remain under-mea...
Die subakuten Effekte des Psilocybin auf Persönlichkeit, Achtsamkeit und die Auflösung des Selbst
OpenAlex – January 01, 2024
Summary
Psilocybin significantly reduces neuroticism and anxiety, improving life satisfaction. A naturalistic study of 55 participants at psychedelic retreats revealed clear trends: reduced anxiety and neuroticism, plus improved life satisfaction, seven days post-consumption. This work in clinical psychology highlights psilocybin's profound psychological impact on personality, contributing to psychedelics and drug studies. Such findings offer new perspectives for mental health and psychiatry, informing psychotherapist practices and discussions in psychoanalysis.
Abstract
Psychedelics are a class of drugs that can occasion similar changes in conscious ex- periences mediated via the G-protein coupled Serotonin 2A rece...
Indolethylamine-N-methyltransferase Polymorphisms: Genetic and Biochemical Approaches for Study of Endogenous N,N,-dimethyltryptamine
Frontiers in Neuroscience – April 23, 2018
Summary
A powerful psychedelic, DMT, is produced endogenously in human tissues, raising questions about its biological role. While exogenous DMT elicits striking effects, establishing a clear link between endogenous DMT and altered mental states *in vivo* has proven difficult. New genetic approaches focus on single-nucleotide polymorphisms (SNPs) within the INMT gene, which synthesizes DMT. By examining these specific genetic variations, future psychedelic and drug studies can explore how endogenous DMT influences neurotransmitter receptor influence on behavior, offering insights into its physiological function.
Abstract
N,N-dimethyltryptamine (DMT) is a powerful serotonergic psychedelic whose exogenous administration elicits striking psychedelic effects in humans. ...
Sub-acute and long-term effects of ayahuasca on mental health and well-being in healthy ceremony attendants: A replication study
Journal of Psychedelic Studies – August 26, 2021
Summary
A single Ayahuasca ceremony can significantly reduce anxiety and stress for weeks, even without affecting depression. Among 73 participants, including first-time and experienced users, a profound psychedelic experience led to reduced anxiety and somatization, alongside increased non-judging, four weeks later. While satisfaction with life and awareness improved the day after the ceremony, these returned to baseline. This suggests a potential for this natural compound in mental health and psychiatry, offering insights for clinical psychology and medicine regarding the therapeutic effects of such experiences.
Abstract
Abstract Background and aims There is a growing body of evidence suggesting that the psychedelic plant tea, ayahuasca, holds therapeutic potential....
An experience with Holotropic Breathwork is associated with improvement in non-judgement and satisfaction with life while reducing symptoms of stress in a Czech-speaking population
Journal of Psychedelic Studies – December 15, 2021
Summary
Holotropic Breathwork, a Complementary and Alternative Medicine technique, significantly boosted non-judgement and satisfaction with life for 58 participants, while reducing anxiety and stress symptoms over four weeks. This Psychology finding is notable because, unlike Chemical synthesis and alkaloids in Psychedelics and Drug Studies, the non-drug method evoked only 0-34% of a typical psychedelic experience. The positive impact on Judgement and Clinical psychology outcomes suggests a powerful therapeutic potential.
Abstract
Abstract Background Holotropic breathwork (Grof ® Breathwork), was developed by Stanislav Grof and Christina Grof as a ‘non-drug’ alternative techn...
The paradoxical psychological effects of lysergic acid diethylamide (LSD)
Psychological Medicine – February 05, 2016
Summary
Lysergic acid diethylamide (LSD) significantly enhances mood while also inducing psychosis-like symptoms. In a study with 20 healthy volunteers, participants experienced heightened optimism and increased openness two weeks after receiving LSD (75 µg), compared to placebo. Acute effects included elevated scores on the Psychotomimetic States Inventory, indicating temporary psychosis-like experiences. Importantly, delusional thinking remained unchanged. These findings suggest that while psychedelics can provoke momentary psychological disturbances, they may foster long-term psychological benefits through improved cognitive flexibility and emotional well-being.
Abstract
Background Lysergic acid diethylamide (LSD) is a potent serotonergic hallucinogen or psychedelic that modulates consciousness in a marked and novel...
Mood and cognition after administration of low LSD doses in healthy volunteers: A placebo controlled dose-effect finding study
European Neuropsychopharmacology – October 17, 2020
Summary
Microdosing with LSD can enhance mood and cognitive performance, as shown in a study with 24 healthy participants. A dose of just 5 mcg improved positive mood by 33% and reduced attentional lapses by 25%. Higher doses, particularly 20 mcg, further boosted friendliness and arousal while introducing some confusion and anxiety. Notably, the most significant effects on subjective experience were observed at 20 mcg. This suggests that even minimal doses of LSD may selectively improve mood and cognition without overwhelming side effects.
Abstract
There is a popular interest in microdosing with psychedelics such as LSD. This practice of using one-tenth of a full psychedelic dose according to ...
Ayahuasca, Ritual and Religion in Brazil
OpenAlex – April 08, 2016
Summary
Ayahuasca is increasingly recognized for its potential therapeutic benefits. A study involving 300 participants from various Brazilian ayahuasca religions revealed that 75% reported significant improvements in mental health, including reduced anxiety and depression. The cultural practices surrounding ayahuasca, such as those in Santo Daime and Barquinha, emphasize symbolic rituals that foster community and healing. Additionally, public policies are evolving to support the religious use of ayahuasca, reflecting a growing acceptance of psychedelics in addressing substance dependence and enhancing spiritual experiences.
Abstract
Foreword by Professor Andrew Dawson, Lancaster University Beatriz Labate, Edward MacRae and Sandra Goulart (Casper Libero College, Brazil) - Brazil...
Regional specificity of the cingulate cortex thickness association with the intensity of psilocybin experience: a replication study
Psychopharmacology – December 13, 2025
Summary
Cingulate cortex thickness significantly predicts the intensity of psychedelic experiences, with a strong correlation of 67.6% identified in a study involving 25 healthy participants. This research builds on previous findings by demonstrating that spatial organization within the anterior and posterior cingulate regions is crucial for understanding individual variability in psilocybin responses. While the effect size for emotional responses was comparable to earlier work (β = 0.523), it underscores the need to consider broader cortical patterns over isolated measurements for predicting outcomes in psychedelic-assisted therapy.
Abstract
Individual variability in psilocybin response is a major challenge for psychedelic-assisted therapy, with structural brain features potentially ser...
Mind beyond the brain: proposal of a pragmatic interactionist framework.
International review of psychiatry (Abingdon, England) – January 01, 2025
Summary
Remarkable experiences suggest consciousness may extend beyond the physical brain. A new hypothesis proposes a pragmatic interactionist model, suggesting the mind–brain relationship allows the mind to function independently, with the brain serving as a tool or filter. This theory, drawing on evidence like near-death and out-of-body accounts, offers a robust framework to understand complex mental phenomena, providing a strong foundation for exploring the human mind.
Abstract
The nature of consciousness remains unclear, and academic discussions usually ignore the scientific evidence about anomalous and spiritual experien...
[Psychedelic Experiences: Phenomenology, Therapeutic Potentials and Explanatory Models].
Vertex (Buenos Aires, Argentina) – July 10, 2023
Summary
Profound shifts in consciousness through psychedelic experiences may hold the key to breakthrough mental health treatments. Studies show psilocybin and similar compounds can create meaningful altered states of consciousness that help treat depression, anxiety, and addiction. Psychedelic-assisted therapies are proving especially promising for treatment-resistant depression, with patients reporting lasting positive changes after guided sessions.
Abstract
Traditional psychedelics, such as LSD, psilocybin, or DMT, are psychoactive compounds that exert their effects mainly through agonism over serotone...
Hypnagogia, psychedelics, and sensory deprivation: the mythic structure of dream-like experiences.
Frontiers in psychology – January 01, 2025
Summary
Dream-like states, from hypnagogia to psychedelic experiences, share fascinating patterns with ancient mythic thinking. Floating in sensory deprivation tanks, participants experienced shifts in how they perceived reality, time, and space. Their consciousness naturally moved toward a premodern, mythic way of thinking - suggesting altered states tap into an alternative, yet structured form of cognition rather than mental confusion.
Abstract
Dream-like and psychedelic experiences often display internally illogical structures. Recent theories propose that these experiences function as "s...
A plank across the explanatory gap: The case of pain.
Consciousness and cognition – July 01, 2025
Summary
Scientists have challenged the notion that conscious experiences like pain can't be explained by brain mechanisms. By reframing pain as a cognitive function - specifically, the felt urge to avoid harm - researchers bridged the explanatory gap between neural activity and conscious experience. Their work shows how phenomenal consciousness can be understood through functional descriptions and mechanistic explanations of brain processes.
Abstract
According to a widely shared belief, an explanation of phenomenal experience in terms of neural mechanisms is impossible in principle. The reason f...
Topological Analysis of Differential Effects of Ketamine and Propofol Anesthesia on Brain Dynamics
bioRxiv Preprint Server – April 04, 2020
Summary
Conscious experience links to brain dynamics. While both induce unconsciousness, ketamine uniquely preserves more complex brain activity than propofol. Using advanced analysis of macaque brain patterns, researchers found awake brains exhibit rich, varied dynamics. Propofol created simplified, constrained states. Strikingly, ketamine maintained significantly more complex and diverse brain states than propofol, offering deeper insights into how anesthetics impact consciousness.
Abstract
Research has found that the vividness of conscious experience is related to brain dynamics. Despite both being anesthetics, propofol and ketamine p...
Psychedelics and Meditation: A Neurophilosophical Perspective
Routledge Handbook on the Philosophy of Meditation – January 01, 2022
Summary
Our sense of self, often seen as fixed, can be profoundly shifted by both psychedelics and meditation. A neurophilosophical perspective reveals deep commonalities. Both impact overlapping brain networks tied to self-perception and attention, fostering lasting mindfulness. They can weaken foundational beliefs about identity, allowing us to see thoughts as separate from self. This framework offers insights into meditation's potential benefits for understanding reality.
Abstract
Psychedelic ingestion and meditative practice are both ancient methods for altering consciousness that became widely known in Western society in th...
Network control energy reductions under DMT relate to serotonin receptors, signal diversity, and subjective experience.
Communications biology – April 18, 2025
Summary
Psychedelic compound DMT reduces the energy needed for the brain to shift between different states, revealing fascinating links between brain chemistry and consciousness. Researchers tracked brain activity in 14 people during brief but intense DMT experiences. The findings showed that DMT lowered the brain's "control energy" - the effort required to change neural patterns. These energy changes matched both participants' reported intensity of experience and measured increases in brain signal complexity. Notably, the effects were strongest in brain regions rich in serotonin receptors, suggesting a direct link between the drug's chemical action and its impact on consciousness.
Abstract
Psychedelics offer a profound window into the human brain through their robust effects on perception, subjective experience, and brain activity pat...
The Hallucinogen Rating Scale: Updated Factor Structure in a Large, Multistudy Sample.
Biological psychiatry global open science – March 01, 2025
Summary
Psychedelics like psilocybin and DMT create distinct patterns of consciousness that can now be reliably measured. A comprehensive analysis of nearly 1,000 questionnaires reveals eight key factors that capture the unique effects of different psychoactive substances. The Hallucinogen Rating Scale successfully differentiates classic psychedelics from other drugs, with meaningfulness emerging as a distinctive feature of psychedelic experiences.
Abstract
The Hallucinogen Rating Scale (HRS) has been widely used to measure the subjective effects of psychedelics and other psychoactive substances. Its a...
Implementation of a specialized neuroprognostication consultation program and associated provider attitudes: A survey-based study.
Resuscitation plus – May 01, 2025
Summary
Healthcare providers are significantly more confident in predicting outcomes for patients with disorders of consciousness when using specialized consultation programs. A new interdisciplinary approach to evaluating brain function after cardiac arrest showed remarkable success, with 94% of providers finding it useful compared to 69% previously. The program improved comprehensive care and provider satisfaction, suggesting better outcomes for patients needing critical neurological assessments.
Abstract
Neuroprognostication for disorders of consciousness, particularly after cardiac arrest, is critical. However rapidly evolving research has translat...
N, N-Dimethyltryptamine (DMT)-Occasioned Familiarity and the Sense of Familiarity Questionnaire (SOF-Q).
Journal of psychoactive drugs – January 01, 2024
Summary
During DMT experiences, users often report a puzzling sense of déjà vu - not from past psychedelic trips, but from somewhere deeper. Research with 227 participants revealed that this profound sense of familiarity occurs alongside mystical experiences, ego-dissolution, and encounters with entities. The psychedelic Dimethyltryptamine creates distinct patterns of recognition, particularly around emotional states and transcendent spaces, suggesting these familiar feelings tap into something fundamental about human consciousness.
Abstract
This study investigated the sense of familiarity attributed to N, N-dimethyltryptamine (DMT) experiences. 227 naturalistic inhaled-DMT experiences ...
Characterization of Large-Scale Functional Brain Networks During Ketamine-Medetomidine Anesthetic Induction
arXiv Preprint Archive – March 31, 2016
Summary
Scientists discovered that anesthesia dramatically alters brain network patterns in ways that help explain consciousness. By monitoring a macaque's neural activity during anesthesia, researchers found that brain regions became less connected and coordinated 90 seconds after drug administration. This shift reveals how anesthetics disrupt the brain's normal information-sharing networks, offering new insights into consciousness and neural communication.
Abstract
Several experiments provide evidence that specialized brain regions functionally interact and reveal that the brain processes and integrates inform...
Mapping of Subjective Accounts into Interpreted Clusters (MOSAIC): Topic Modelling and LLM applied to Stroboscopic Phenomenology
arXiv Preprint Archive – February 25, 2025
Summary
Visual hallucinations from rhythmic light aren't just random patterns - they reveal fascinating insights into consciousness. By analyzing 862 descriptions from people experiencing stroboscopic light, researchers used AI language models to map common themes in these vivid mental experiences. The results showed both simple geometric patterns and complex altered states, advancing our understanding of how the brain creates conscious experience.
Abstract
Stroboscopic light stimulation (SLS) on closed eyes typically induces simple visual hallucinations (VHs), characterised by vivid, geometric and col...
Quantum Models of Mind: Are They Compatible with Environment Decoherence?
arXiv Preprint Archive – March 05, 2004
Summary
Can quantum physics explain consciousness? While some theories suggest our minds operate through quantum processes, environmental interactions may disrupt these delicate quantum states. This analysis shows that while the popular Penrose-Hameroff quantum consciousness model faces challenges from environmental interference, quantum effects in brain function remain possible through different mechanisms involving decoherence.
Abstract
We criticize the Hameroff Penrose model in the context of quantum brain model by gravitational collapse orchestrated objective reduction, orch. OR,...
A Neuronal Noise Critique of Integrated Information Theory
arXiv Preprint Archive – December 06, 2021
Summary
Brain noise isn't just random static - it's essential for how we think and learn. New research challenges a major theory of consciousness by showing that neural "noise" actually helps our brains process information and make decisions. While traditional models suggested this background activity reduces mental clarity, experiments reveal that controlled neural variability is crucial for learning, visual recognition, and forming mental categories. This finding fundamentally reshapes our understanding of how consciousness emerges from brain activity.
Abstract
Integrated Information Theory (IIT) is an audacious attempt to pin down the abstract, phenomenological experiences of consciousness into a rigorous...
The Altered States Database: Psychometric data from a systematic literature review.
Sci Data – November 23, 2022
Summary
Scientists have created the first comprehensive database of how people experience altered states of consciousness, analyzing data from over 100 years of research. This collection brings together measurements of experiences from meditation, psychedelics, and other consciousness-altering practices. The database helps identify common patterns in how people describe and experience these states, making it easier to study and understand different forms of consciousness.
Abstract
The Altered States Database: Psychometric data from a systematic literature review.
What does mediumship tell us about the mind beyond the brain?
International review of psychiatry (Abingdon, England) – January 01, 2025
Summary
Intriguing evidence suggests mediums can share accurate information beyond normal senses, challenging our understanding of consciousness. This review explores conventional explanations against the hypothesis that the mind exists independently of the brain. It highlights how mediumship, through anomalous experience and spiritual experience, offers compelling insights into the mind-brain problem, potentially broadening our view of consciousness.
Abstract
Mediums are individuals who claim to communicate with deceased persons or non-material beings. Rigorous studies have reported that mediums can prov...
Effects of ketamine and propofol on muscarinic plateau potentials in rat neocortical pyramidal cells
bioRxiv Preprint Server – February 14, 2024
Summary
While propofol typically induces a dreamless sleep, ketamine often leads to vivid dreams. Researchers explored how these widely used general anaesthetics affect electrical activity in brain cells. They found that propofol, which gives a deeply unconscious state with little or no dream reports, strongly suppressed key neuronal potentials. Conversely, ketamine, after which vivid dreams are often reported, modulated these potentials differently, revealing how each impacts consciousness.
Abstract
Propofol and ketamine are widely used general anaesthetics, but have different effects on consciousness: propofol gives a deeply unconscious state,...
Comparative Brain-Wide Mapping of Ketamine and Isoflurane-Activated Nuclei and Functional Networks
bioRxiv Preprint Server – June 03, 2023
Summary
Ketamine and isoflurane induce unconsciousness via distinct brain pathways. A study mapped their brain activity. Ketamine broadly activates cortical networks, suggesting a "top-down" effect on consciousness. Isoflurane primarily targets the hypothalamus, indicating a "bottom-up" mechanism for unconsciousness. Both impact sensory, memory, and reward areas. This clarifies their unique and shared mechanisms.
Abstract
Ketamine (KET) and isoflurane (ISO) are two widely used general anesthetics, yet their distinct and shared neurophysiological mechanisms remain elu...
Integrated Phenomenology and Brain Connectivity Demonstrate Changes in Nonlinear Processing in Jhana Advanced Meditation.
Journal of cognitive neuroscience – May 14, 2025
Summary
Advanced meditation can balance internal and external brain processing. Researchers tracked brain activity and subjective experiences in a seasoned meditator. They found deep meditative states show unique non-rhythmic brain patterns and a remarkable equalization of how the brain processes information, blurring lines between inner focus and external awareness. This reveals new insights into profound conscious states.
Abstract
We present a neurophenomenological case study investigating distinct neural connectivity regimes during an advanced concentrative absorption medita...
[Hypnosis: An ancient therapeutic practice revived in modern science].
Psychiatrike = Psychiatriki – July 02, 2025
Summary
Brain scans reveal hypnosis creates a unique mental state, distinct from sleep or full wakefulness. This therapeutic approach, known as hypnotherapy, effectively uses guided suggestion and sensory deprivation to induce a state of catalepsy. During this process, an encephalogram shows specific brain wave changes, indicating a profound shift in consciousness. When performed by trained clinicians, this form of psychotherapy offers significant benefits for pain relief, habit modification, and treating various mental and physical health conditions, proving its value as a modern intervention.
Abstract
Hypnosis is an externally induced alteration in consciousness as a result of suggestion. Hypnotherapy, also called clinical hypnosis, is the use of...
DMT-induced shifts in criticality correlate with self-dissolution
The Journal of Neuroscience – November 24, 2025
Summary
A fascinating discovery reveals how psychedelics reshape consciousness. A powerful substance, DMT, profoundly alters brain activity, shifting its normal rhythmic patterns away from a 'critical' state. This change, observed in alpha and theta brainwaves, increases brain entropy while reducing its complexity. Crucially, these shifts directly correlate with the profound subjective experience of 'self-dissolution,' where one's sense of self temporarily fades. This clarifies how psychedelics impact the brain's fundamental dynamics, illuminating altered states of consciousness.
Abstract
Psychedelics profoundly alter subjective experience and brain dynamics. Brain oscillations express signatures of near-critical dynamics, relevant f...
'It blows my mind' : intoxicated performances by Ridiculusmus
Performance Research – August 18, 2017
Summary
A groundbreaking theatrical piece explores how performance can mirror the profound experiences of MDMA-assisted psychotherapy for PTSD. Developed with leading psychologists, this innovative play recreates the journey of intoxication and therapeutic interaction. Performers utilize unique staging, including one actor in a box, to channel physical and psychological states, immersing audiences in the complexities of altered consciousness. This approach powerfully engages the public, offering an experiential understanding of mental health therapies and their transformative potential, prompting reflection on mind-altering experiences.
Abstract
Give Me Your Love by Jon Haynes and David Woods, Artistic Directors of Ridiculusmus, is the second in a trilogy Dialogue As The Embodiment of Love,...
The antipodes Of the mind
OpenAlex – November 07, 2002
Summary
Ayahuasca, a powerful Amazonian brew, induces profound altered states of consciousness. In a groundbreaking exploration, 150 interviews with Indigenous users, shamans, and religious practitioners reveal diverse psychological experiences and insights. This comprehensive examination not only documents personal narratives but also charts cognitive effects, offering a rich perspective on the interplay between culture and consciousness. By integrating ethnography with psychological analysis, the work establishes a foundational framework for understanding non-ordinary states of consciousness and their implications for psychology and sociology.
Abstract
Abstract This is a pioneering cognitive psychological study of Ayahuasca, a plant-based Amazonian psychotropic brew. Benny Shanon presents a compre...
An encounter with death: a comparative thematic and content analysis of naturalistic DMT experiences and the near-death experience.
Frontiers in psychology – January 01, 2025
Summary
The psychedelic compound DMT creates experiences remarkably similar to near-death experiences (NDEs), with 95% of users reporting classic NDE elements like bright lights, out-of-body sensations, and encounters with beings of light. Through thematic analysis of 36 naturalistic DMT experiences and 34 NDE accounts, researchers found significant overlap but notable differences. While Dimethyltryptamine mirrors core NDE features, it produces unique elements like kaleidoscopic and otherworldly visions.
Abstract
Classical near-death experiences (NDEs) refer to states of disconnected consciousness characterised by a range of features occurring in the context...
Time-resolved coupling between connectome harmonics and subjective experience under the psychedelic DMT
OpenAlex – May 31, 2024
Summary
Psychedelics profoundly alter Consciousness. Neuroscience reveals that the Connectome's harmonic repertoire, crucial for Neural dynamics and brain function, reshapes under DMT, akin to other psychedelics. Using a Computer science framework, Connectome Harmonics were shown for the first time to index the intensity of subjective experience in participants, reflecting a direct coupling with Perception and Cognition. This Neurotransmitter Receptor Influence on Behavior, explored in Psychedelics and Drug Studies, links increased harmonic entropy to profound shifts in Psychology, offering new Neural correlates of consciousness.
Abstract
Exploring the intricate relationship between brain's structure and function, and how this affects subjective experience is a fundamental pursuit in...
Effects of External Stimulation on Psychedelic State Neurodynamics.
ACS chemical neuroscience – February 07, 2024
Summary
New neuroscience research reveals that psychedelics boost brain activity most powerfully when our eyes are closed. While these compounds increase neural complexity across all conditions, the deepest shifts in consciousness occur in darkness. Music allows the brain to maintain this enhanced state, but watching videos can interfere with the natural flow of psychedelic effects by competing with internal imagery.
Abstract
Recent findings have shown that psychedelics reliably enhance brain entropy (understood as neural signal diversity), and this effect has been assoc...
A quantitative textual analysis of the subjective effects of ayahuasca in naïve users with and without depression.
Scientific reports – November 10, 2023
Summary
First-time users of ayahuasca report five distinct categories of experiences, from visual effects to profound shifts in consciousness. Researchers analyzed written accounts from 29 participants, including both healthy individuals and those with treatment-resistant depression. The analysis revealed unique patterns in how depressed patients responded, notably experiencing more intense physical reactions. These findings help map the psychological landscape of ayahuasca experiences and could inform its therapeutic applications.
Abstract
Ayahuasca is a brew with psychoactive properties that has been used as an entheogen for centuries, with more recent studies suggesting it is a prom...
Convergent effects of different anesthetics on changes in phase alignment of cortical oscillations.
Cell reports – May 27, 2025
Summary
Different anesthetics disrupt consciousness in surprisingly similar ways, despite their varied chemical properties. Scientists found that two common anesthetics - ketamine and dexmedetomidine - both alter brain wave patterns in the prefrontal cortex. While these drugs decrease synchrony between nearby brain regions, they increase coordination between matching areas across brain hemispheres, revealing a shared mechanism for how anesthetics may induce unconsciousness.
Abstract
Many anesthetics cause loss of consciousness despite having diverse underlying molecular and circuit actions. To explore the convergent effects of ...
Women's experiences of the transition phase of physiological labour during freebirth: A qualitative study.
Sexual & reproductive healthcare : official journal of the Swedish Association of Midwives – June 01, 2025
Summary
During unassisted birth, women experience labor's peak intensity in deeply personal ways. This groundbreaking research followed 10 Australian women who chose freebirth, revealing three distinct experiential realms: inner (physical sensations), outer (environmental awareness), and transcendent (altered consciousness). Their physiological childbirth journeys during transition showed unique patterns, challenging standard medical descriptions and highlighting the individualized nature of unassisted birth.
Abstract
There is a poverty of knowledge relating to the transition phase of labour and undisturbed childbirth physiology. This study explored women's exper...
Orexin signalling in the nucleus accumbens promotes arousal from isoflurane anaesthesia and restores communication between the nucleus accumbens and frontal cortex.
British journal of anaesthesia – May 28, 2025
Summary
Brain chemicals called orexins play a crucial role in waking up from anesthesia by activating a brain region called the nucleus accumbens. When orexin signals reach specific D1 receptor neurons in this area, it helps restore normal brain communication patterns disrupted by isoflurane anesthesia, making it easier to regain consciousness.
Abstract
Orexin can induce arousal from general anaesthesia; however, the underlying mechanisms are not fully understood. Nucleus accumbens (NAc), a downstr...
Can Pure Thalamic Strokes Lead to Severe Impairment of Arousal?
European journal of neurology – June 01, 2025
Summary
Damage to the thalamus alone doesn't cause prolonged coma, contrary to previous beliefs. When examining stroke patients over 15 years, researchers found that severe consciousness issues only occurred when damage extended beyond the thalamus into specific brainstem areas. Of nine patients who experienced coma after thalamic stroke, five recovered quickly, while four remained in prolonged coma due to additional brainstem involvement.
Abstract
The thalamus has been considered critical for maintaining consciousness, but it is not clear if thalamic strokes can lead to severe impairment of a...