Neuroscience of Consciousness最新文献

The influence of signal strength on conscious and nonconscious neural processing of emotional faces.

IF 3.1

Neuroscience of Consciousness Pub Date : 2025-02-05 eCollection Date: 2025-01-01 DOI: 10.1093/nc/niaf001

Insa Schlossmacher, Marie Herbig, Torge Dellert, Thomas Straube, Maximilian Bruchmann

{"title":"The influence of signal strength on conscious and nonconscious neural processing of emotional faces.","authors":"Insa Schlossmacher, Marie Herbig, Torge Dellert, Thomas Straube, Maximilian Bruchmann","doi":"10.1093/nc/niaf001","DOIUrl":"10.1093/nc/niaf001","url":null,"abstract":"Consciously perceived emotional relative to neutral facial expressions evoke stronger early and late event-related potential (ERP) components. However, the extent of nonconscious neural processing of emotional information in faces is still a matter of debate. One possible reason for conflicting findings might relate to threshold effects depending on the sensory strength of stimuli. In the current study, we investigated this issue by manipulating the contrast of fearful and neutral faces presented with or without continuous flash suppression (CFS). Low, medium, and high contrasts were calibrated individually so that faces were consciously perceived at all contrast levels if presented without CFS. With CFS, however, low- and medium-contrast faces remained nonconscious, while high-contrast faces broke the suppression. Without CFS, ERPs showed an increased early negativity and late positivity in response to fearful vs. neutral faces regardless of contrast. Under CFS, we observed differential early negativities for suppression-breaking high-contrast fearful vs. neutral faces. For nonconscious faces, however, the contrast level modulated the difference between fearful and neutral faces, showing enhanced early negativities only at medium contrast and an inverted effect at low contrast. Additional analysis of late positivities provided evidence for the absence of an effect at low and medium contrast, while at high-contrast, fearful faces elicited a larger positivity than neutral ones. Taken together, our findings demonstrate the significance of stimulus strength for nonconscious emotion processing under CFS, implying that early negative ERP differences between neutral and fearful faces depend on stimulus contrast near the detection threshold.","PeriodicalId":52242,"journal":{"name":"Neuroscience of Consciousness","volume":"2025 1","pages":"niaf001"},"PeriodicalIF":3.1,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799861/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143366784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flow and intuition: a systems neuroscience comparison. 心流和直觉：一个系统神经科学的比较。

IF 3.1

Neuroscience of Consciousness Pub Date : 2025-01-04 eCollection Date: 2025-01-01 DOI: 10.1093/nc/niae040

Steven Kotler, Darius Parvizi-Wayne, Michael Mannino, Karl Friston

{"title":"Flow and intuition: a systems neuroscience comparison.","authors":"Steven Kotler, Darius Parvizi-Wayne, Michael Mannino, Karl Friston","doi":"10.1093/nc/niae040","DOIUrl":"10.1093/nc/niae040","url":null,"abstract":"This paper explores the relationship between intuition and flow from a neurodynamics perspective. Flow and intuition represent two cognitive phenomena rooted in nonconscious information processing; however, there are clear differences in both their phenomenal characteristics and, more broadly, their contribution to action and cognition. We propose, extrapolating from dual processing theory, that intuition serves as a rapid, nonconscious decision-making process, while flow facilitates this process in action, achieving optimal cognitive control and performance without [conscious] deliberation. By exploring these points of convergence between flow and intuition, we also attempt to reconcile the apparent paradox of the presence of enhanced intuition in flow, which is also a state of heightened cognitive control. To do so, we utilize a revised dual-processing framework, which allows us to productively align and differentiate flow and intuition (including intuition in flow). Furthermore, we draw on recent work examining flow from an active inference perspective. Our account not only heightens understanding of human cognition and consciousness, but also raises new questions for future research, aiming to deepen our comprehension of how flow and intuition can be harnessed to elevate human performance and wellbeing.","PeriodicalId":52242,"journal":{"name":"Neuroscience of Consciousness","volume":"2025 1","pages":"niae040"},"PeriodicalIF":3.1,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11700884/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142958631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The case for neurons: a no-go theorem for consciousness on a chip. 神经元的例子：芯片上意识的不去定理。

IF 3.1

Neuroscience of Consciousness Pub Date : 2024-12-26 eCollection Date: 2024-01-01 DOI: 10.1093/nc/niae037

Johannes Kleiner, Tim Ludwig

引用次数: 0

The nature of grief: implications for the neurobiology of emotion. 悲伤的本质：对情绪神经生物学的启示。

IF 3.1

Neuroscience of Consciousness Pub Date : 2024-12-17 eCollection Date: 2024-01-01 DOI: 10.1093/nc/niae041

Matthew Ratcliffe, Pablo Fernandez Velasco

引用次数: 0

Big brother: the effects of surveillance on fundamental aspects of social vision. 老大哥：监视对社会视野基本方面的影响。

IF 3.1

Neuroscience of Consciousness Pub Date : 2024-12-10 eCollection Date: 2024-01-01 DOI: 10.1093/nc/niae039

Kiley Seymour, Jarrod McNicoll, Roger Koenig-Robert

引用次数: 0

Phenomenology of auto-induced cognitive trance using text mining: a prospective and exploratory group study. 利用文本挖掘自动诱发认知恍惚的现象学：一项前瞻性和探索性小组研究。

IF 3.1

Neuroscience of Consciousness Pub Date : 2024-11-22 eCollection Date: 2024-01-01 DOI: 10.1093/nc/niae036

Audrey Vanhaudenhuyse, Marie-Carmen Castillo, Charlotte Martial, Jitka Annen, Aminata Bicego, Floriane Rousseaux, Leandro R D Sanz, Corine Sombrun, Antoine Bioy, Olivia Gosseries

{"title":"Phenomenology of auto-induced cognitive trance using text mining: a prospective and exploratory group study.","authors":"Audrey Vanhaudenhuyse, Marie-Carmen Castillo, Charlotte Martial, Jitka Annen, Aminata Bicego, Floriane Rousseaux, Leandro R D Sanz, Corine Sombrun, Antoine Bioy, Olivia Gosseries","doi":"10.1093/nc/niae036","DOIUrl":"10.1093/nc/niae036","url":null,"abstract":"Auto-induced cognitive trance (AICT) is a modified state of consciousness derived from shamanic tradition that can be practised by individuals after specific training. The aim of this work was to characterize the phenomenological experiences of AICT, using text mining analysis. Free recalls of subjective experiences were audio-recorded in 27 participants after five pseudo-randomized experimental sessions: ordinary conscious resting state, with auditory stimulation and with an imaginary mental task, as well as during AICT with and without auditory stimulation. Recordings were transcribed, normalized total word counts were calculated for each condition, and analyses of content were performed using IRaMuTeQ software. Results showed that the length of the participants' reports was higher for AICT compared to the other conditions, and that the content could be categorized into four classes of discourse: AICT memory, AICT, ordinary conscious states, and AICT with and without stimulation. AICT was also characterized by specific content compared to rest, auditory stimulation, and imagination conditions. Content analysis of the narrative revealed nine categories encompassing the presence of nature, people, animals, positive and negative features, sensory perceptions, body modifications, metacognition, and difficulty of describing thoughts. Among these categories, AICT is specifically characterized by reports related to the presence of nature, animals, body modifications, as well as the difficulty of describing thoughts. These results suggest that a richer phenomenology was reported during AICT, compared to the other conditions, and that AICT constitutes a class of discourse on its own, with a clear dissociation from the other conditions.","PeriodicalId":52242,"journal":{"name":"Neuroscience of Consciousness","volume":"2024 1","pages":"niae036"},"PeriodicalIF":3.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11583940/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142711336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

More than words: can free reports adequately measure the richness of perception? 不只是文字：免费报告能否充分衡量感知的丰富性？

IF 3.1

Neuroscience of Consciousness Pub Date : 2024-10-23 eCollection Date: 2024-01-01 DOI: 10.1093/nc/niae035

Rony Hirschhorn, Liad Mudrik

{"title":"More than words: can free reports adequately measure the richness of perception?","authors":"Rony Hirschhorn, Liad Mudrik","doi":"10.1093/nc/niae035","DOIUrl":"https://doi.org/10.1093/nc/niae035","url":null,"abstract":"The question of the richness (or sparseness) of conscious experience has evoked ongoing debate and discussion. Claims for both richness and sparseness are supported by empirical data, yet they are often indirect, and alternative explanations have been put forward. Recently, it has been suggested that current experimental methods limit participants' responses, thereby preventing researchers from assessing the actual richness of perception. Instead, free verbal reports were presented as a possible way to overcome this limitation. As part of this approach, a novel paradigm of freely reported words was developed using a new metric, intersubjective agreement (IA), with experimental results interpreted as capturing aspects of conscious perception. Here, we challenge the validity of freely reported words as a tool for studying the richness of conscious experience. We base our claims on two studies (each composed of three experiments), where we manipulated the richness of percepts and tested whether IA changed accordingly. Five additional control experiments were conducted to validate the experimental logic and examine alternative explanations. Our results suggest otherwise, presenting four challenges to the free verbal report paradigm: first, impoverished stimuli did not evoke lower IA scores. Second, the IA score was correlated with word frequency in English. Third, the original positive relationship between IA scores and rated confidence was not found in any of the six experiments. Fourth, a high rate of nonexisting words was found, some of which described items that matched the gist of the scene but did not appear in the image. We conclude that a metric based on freely reported words might be better explained by vocabulary conventions and gist-based reports than by capturing the richness of perception.","PeriodicalId":52242,"journal":{"name":"Neuroscience of Consciousness","volume":"2024 1","pages":"niae035"},"PeriodicalIF":3.1,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11498181/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142512740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Making sense of feelings. 感同身受。

IF 3.1

Neuroscience of Consciousness Pub Date : 2024-09-19 eCollection Date: 2024-01-01 DOI: 10.1093/nc/niae034

Brian Key, Deborah J Brown

{"title":"Making sense of feelings.","authors":"Brian Key, Deborah J Brown","doi":"10.1093/nc/niae034","DOIUrl":"https://doi.org/10.1093/nc/niae034","url":null,"abstract":"Internal feeling states such as pain, hunger, and thirst are widely assumed to be drivers of behaviours essential for homeostasis and animal survival. Call this the 'causal assumption'. It is becoming increasingly apparent that the causal assumption is incompatible with the standard view of motor action in neuroscience. While there is a well-known explanatory gap between neural activity and feelings, there is also a disjuncture in the reverse direction-what role, if any, do feelings play in animals if not to cause behaviour? To deny that feelings cause behaviours might thus seem to presage epiphenomenalism-the idea that subjective experiences, including feelings, are inert, emergent and, on some views, non-physical properties of brain processes. Since epiphenomenalism is antagonistic to fundamental commitments of evolutionary biology, the view developed here challenges the standard view about the function of feelings without denying that feelings have a function. Instead, we introduce the 'sense making sense' hypothesis-the idea that the function of subjective experience is not to cause behaviour, but to explain, in a restricted but still useful sense of 'explanation'. A plausible framework is derived that integrates commonly accepted neural computations to blend motor control, feelings, and explanatory processes to make sense of the way feelings are integrated into our sense of how and why we do and what we do.","PeriodicalId":52242,"journal":{"name":"Neuroscience of Consciousness","volume":"2024 1","pages":"niae034"},"PeriodicalIF":3.1,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11412240/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142300568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Within-subject comparison of near-death and psychedelic experiences: acute and enduring effects. 濒死体验和迷幻体验的受试者内部比较：急性效应和持久效应。

IF 3.1

Neuroscience of Consciousness Pub Date : 2024-08-30 eCollection Date: 2024-01-01 DOI: 10.1093/nc/niae033

Charlotte Martial, Robin Carhart-Harris, Christopher Timmermann

{"title":"Within-subject comparison of near-death and psychedelic experiences: acute and enduring effects.","authors":"Charlotte Martial, Robin Carhart-Harris, Christopher Timmermann","doi":"10.1093/nc/niae033","DOIUrl":"10.1093/nc/niae033","url":null,"abstract":"Mystical-like states of consciousness may arise through means such as psychedelic substances, but may also occur unexpectedly during near-death experiences (NDEs). So far, research studies comparing experiences induced by serotonergic psychedelics and NDEs, along with their enduring effects, have employed between-subject designs, limiting direct comparisons. We present results from an online survey exploring the phenomenology, attribution of reality, psychological insights, and enduring effects of NDEs and psychedelic experiences (PEs) in individuals who have experienced both at some point during their lifetime. We used frequentist and Bayesian analyses to determine significant differences and overlaps (evidence for null hypotheses) between the two. Thirty-one adults reported having experienced both an NDE (i.e. NDE-C scale total score ≥27/80) and a PE (intake of lysergic acid diethylamide, psilocybin/mushrooms, ayahuasca, N,N-dimethyltryptamine, or mescaline). Results revealed areas of overlap between both experiences for phenomenology, attribution of reality, psychological insights, and enduring effects. A finer-grained analysis of the phenomenology revealed a significant overlap in mystical-like effects, while low-level phenomena (sensory effects) were significantly different, with NDEs displaying higher scores of disembodiment and PEs higher scores of visual imagery. This suggests psychedelics as a useful model for studying mystical-like effects induced by NDEs, while highlighting distinctions in sensory experiences.","PeriodicalId":52242,"journal":{"name":"Neuroscience of Consciousness","volume":"2024 1","pages":"niae033"},"PeriodicalIF":3.1,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11363954/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142114661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visual imagery vividness correlates with afterimage conscious perception. 视觉图像的生动性与残像的有意识感知相关。

IF 3.1

Neuroscience of Consciousness Pub Date : 2024-08-01 eCollection Date: 2024-01-01 DOI: 10.1093/nc/niae032

Sharif I Kronemer, Micah Holness, A Tyler Morgan, Joshua B Teves, Javier Gonzalez-Castillo, Daniel A Handwerker, Peter A Bandettini

{"title":"Visual imagery vividness correlates with afterimage conscious perception.","authors":"Sharif I Kronemer, Micah Holness, A Tyler Morgan, Joshua B Teves, Javier Gonzalez-Castillo, Daniel A Handwerker, Peter A Bandettini","doi":"10.1093/nc/niae032","DOIUrl":"10.1093/nc/niae032","url":null,"abstract":"Afterimages are illusory, visual conscious perceptions. A widely accepted theory is that afterimages are caused by retinal signaling that continues after the physical disappearance of a light stimulus. However, afterimages have been reported without preceding visual, sensory stimulation (e.g. conditioned afterimages and afterimages induced by illusory vision). These observations suggest the role of top-down brain mechanisms in afterimage conscious perception. Therefore, some afterimages may share perceptual features with sensory-independent conscious perceptions (e.g. imagery, hallucinations, and dreams) that occur without bottom-up sensory input. In the current investigation, we tested for a link between the vividness of visual imagery and afterimage conscious perception. Participants reported their vividness of visual imagery and perceived sharpness, contrast, and duration of negative afterimages. The afterimage perceptual features were acquired using perception matching paradigms that were validated on image stimuli. Relating these perceptual reports revealed that the vividness of visual imagery positively correlated with afterimage contrast and sharpness. These behavioral results support shared neural mechanisms between visual imagery and afterimages. However, we cannot exclude alternative explanations, including demand characteristics and afterimage perception reporting inaccuracy. This study encourages future research combining neurophysiology recording methods and afterimage paradigms to directly examine the neural mechanisms of afterimage conscious perception.","PeriodicalId":52242,"journal":{"name":"Neuroscience of Consciousness","volume":"2024 1","pages":"niae032"},"PeriodicalIF":3.1,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11294681/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141890881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0