Cerebral cortex (New York, N.Y. : 1991)
October 2, 2025
Weitao Zhang, Zsuzsika Sjoerds, Rebecca Mourits et al.
The neural mechanisms underlying the cognitive metacontrol states of persistence and flexibility are not yet fully understood but are thought to be modulated by frontal and striatal dopamine, respectively. In this study, we attempted to induce persistence and flexibility states by having participants engage in 2 creativity tasks (remote associates task and alternative uses task) and 2...
Cerebral cortex (New York, N.Y. : 1991)
April 1, 2025
Umay Demir, Winson Fu Zun Yang, Matthew D. Sacchet
5 citations
There is growing scientific interest in advanced meditation, and particularly the Theravada Buddhist advanced concentrative absorption meditation known as jhana (ACAM-J). ACAM-J includes a series of eight consecutive meditative states, which are radically altered states of consciousness. The neuroscience of ACAM-J, specifically brain reorganization, remains underspecified in part due to the...
Cerebral cortex (New York, N.Y. : 1991)
February 5, 2025
Ruby M. Potash, Winson F.z. Yang, Brian Winston et al.
11 citations
Advanced meditation has been associated with long- and short-term psychological changes such as bliss, profound insight, and transformation of well-being. However, most advanced meditation neuroimaging analyses have implemented primarily spatially-localized approaches, focusing on discrete regional changes in activity rather than distributed dynamics. The present study uses a geometric...
Cerebral cortex (New York, N.Y. : 1991)
February 5, 2025
Isaac N Treves, Aaron Kucyi, Anna O Tierney et al.
1 citation
Breathing meditation typically consists of directing attention toward breathing and redirecting attention when the mind wanders. As yet, we do not have a full understanding of the neural mechanisms of breath attention, in particular, how large-scale network interactions may be different between breath attention and rest and how these interactions may be modulated during periods of on-task and...
Cerebral cortex (New York, N.Y. : 1991)
January 8, 2025
Megan A. K. Peters
10 citations
Studying subjective experience is hard. We believe that pain is not identical to nociception, nor pleasure a computational reward signal, nor fear the activation of "threat circuitry". Unfortunately, introspective self-reports offer our best bet for accessing subjective experience, but many still believe that introspection is "unreliable" and "unverifiable". But which of introspection's faults...
Cerebral cortex (New York, N.Y. : 1991)
January 8, 2025
Beatrice De Gelder, Nicholas Humphrey, Alan J Pegna
9 citations
Blindsight refers to the ability to make accurate visual discriminations without conscious awareness of the stimuli. In this study, we present new evidence from naturalistic observations of a patient with bilateral damage to the striate cortex, who surprisingly demonstrated the ability to detect colored objects, particularly red ones. Despite the slow and effortful process, the patient reported...
Cerebral cortex (New York, N.Y. : 1991)
November 5, 2024
Michael A Cohen, Cole Dembski, Kevin Ortego et al.
20 citations
What are the neural processes associated with perceptual awareness that are distinct from preconscious sensory encoding and postperceptual processes such as reporting an experience? Using electroencephalography and a no-report visual masking paradigm, we manipulated stimulus visibility by varying the time between stimuli and masks in linear steps (17, 33, 50, 67, and 83 ms). Awareness increased...
Cerebral cortex (New York, N.Y. : 1991)
September 3, 2024
Sha Xie, Shuqi Lu, Jiahao Lu et al.
7 citations
Early childhood marks a pivotal period in the maturation of executive function, the cognitive ability to consciously regulate actions and thoughts. Mindfulness-based interventions have shown promise in bolstering executive function in children. This study used the functional near-infrared spectroscopy technique to explore the impact of mindfulness-based training on young children. Brain imaging...
Cerebral cortex (New York, N.Y. : 1991)
August 1, 2024
Evan Lewis-Healey, Enzo Tagliazucchi, Andrés Canales-Johnson et al.
27 citations
Breathwork is an understudied school of practices involving intentional respiratory modulation to induce an altered state of consciousness (ASC). We simultaneously investigate the phenomenological and neural dynamics of breathwork by combining Temporal Experience Tracing, a quantitative methodology that preserves the temporal dynamics of subjective experience, with low-density portable EEG...
Cerebral cortex (New York, N.Y. : 1991)
August 1, 2024
Koichiro Adachi, Ryu Takizawa
Although many neuroimaging studies have evaluated changes in the prefrontal cortex during mindfulness-based interventions, most of these studies were cross-sectional studies of skilled participants or involved pre-post comparisons before and after a single session. While functional near-infrared spectroscopy is a useful tool to capture changes in the hemodynamic response of the prefrontal...
Cerebral cortex (New York, N.Y. : 1991)
January 31, 2024
Yiyang Cai, Huichao Yang, Xiaosha Wang et al.
9 citations
Sense of agency (SoA) is the sensation that self-actions lead to ensuing perceptual consequences. The prospective mechanism emphasizes that SoA arises from motor prediction and its comparison with actual action outcomes, while the reconstructive mechanism stresses that SoA emerges from retrospective causal processing about the action outcomes. Consistent with the prospective mechanism, motor...
Cerebral cortex (New York, N.Y. : 1991)
January 14, 2024
Winson Fu Zun Yang, Avijit Chowdhury, Marta Bianciardi et al.
41 citations
Jhanas are profound states of mind achieved through advanced meditation, offering valuable insights into the nature of consciousness and tools to enhance well-being. Yet, its neurophenomenology remains limited due to methodological difficulties and the rarity of advanced meditation practitioners. We conducted a highly exploratory study to investigate the neurophenomenology of jhanas in an...
Cerebral cortex (New York, N.Y. : 1991)
August 23, 2023
Bryan M Krause, Declan I Campbell, Christopher K Kovach et al.
Theories of consciousness suggest that brain mechanisms underlying transitions into and out of unconsciousness are conserved no matter the context or precipitating conditions. We compared signatures of these mechanisms using intracranial electroencephalography in neurosurgical patients during propofol anesthesia and overnight sleep and found strikingly similar reorganization of human cortical...
Cerebral cortex (New York, N.Y. : 1991)
December 20, 2022
Jumpei Togawa, Riki Matsumoto, Kiyohide Usami et al.
2 citations
The spatiotemporal dynamics of interaction between slow (delta or infraslow) waves and fast (gamma) activities during wakefulness and sleep are yet to be elucidated in human electrocorticography (ECoG). We evaluated phase-amplitude coupling (PAC), which reflects neuronal coding in information processing, using ECoG in 11 patients with intractable focal epilepsy. PAC was observed between slow...
Cerebral cortex (New York, N.Y. : 1991)
August 22, 2022
Perrine Ruby, Rémy Masson, Benoit Chatard et al.
Event-related potentials (ERPs) associated with the involuntary orientation of (bottom-up) attention toward an unexpected sound are of larger amplitude in high dream recallers (HR) than in low dream recallers (LR) during passive listening, suggesting different attentional functioning. We measured bottom-up and top-down attentional performance and their cerebral correlates in 18 HR (11 women,...
Cerebral cortex (New York, N.Y. : 1991)
March 4, 2022
Anna Eiserbeck, Alexander Enge, Milena Rabovsky et al.
One of the ongoing debates about visual consciousness is whether it can be considered as an all-or-none or a graded phenomenon. While there is increasing evidence for the existence of graded states of conscious awareness based on paradigms such as visual masking, only little and mixed evidence is available for the attentional blink paradigm, specifically in regard to electrophysiological...
Cerebral cortex (New York, N.Y. : 1991)
June 30, 2020
Andrés Canales-Johnson, Alexander J Billig, Francisco A Olivares et al.
51 citations
At any given moment, we experience a perceptual scene as a single whole and yet we may distinguish a variety of objects within it. This phenomenon instantiates two properties of conscious perception: integration and differentiation. Integration is the property of experiencing a collection of objects as a unitary percept and differentiation is the property of experiencing these objects as...
Cerebral cortex (New York, N.Y. : 1991)
March 21, 2020
Haiteng Jiang, Bin He, Xiaoli Guo et al.
40 citations
Despite accumulating evidence suggesting improvement in one's well-being as a result of meditation, little is known about if or how the brain and the periphery interact to produce these behavioral and mental changes. We hypothesize that meditation reflects changes in the neural representations of visceral activity, such as cardiac behavior, and investigated the integration of neural and...
Cerebral cortex (New York, N.Y. : 1991)
September 1, 2018
R Nitsch, F W Stahnisch
Research on memory has been a major focus in the neurosciences over the past decades. An important advance was achieved by Wilder Penfield at the Montreal Neurological Institute, who reported from the 1930s to the 1950s about experiential phenomena induced by electrical brain stimulation in humans, implying neuronal causation of memory. Since then, neuroscientists have addressed the topic of...
Cerebral cortex (New York, N.Y. : 1991)
July 1, 2016
Michael J Hove, Johannes Stelzer, Till Nierhaus et al.
99 citations
Trance is an absorptive state of consciousness characterized by narrowed awareness of external surroundings and has long been used-for example, by shamans-to gain insight. Shamans across cultures often induce trance by listening to rhythmic drumming. Using functional magnetic resonance imaging (fMRI), we examined the brain-network configuration associated with trance. Experienced shamanic...
Cerebral cortex (New York, N.Y. : 1991)
June 1, 2016
Lau M Andersen, Michael N Pedersen, Kristian Sandberg et al.
Two electrophysiological components have been extensively investigated as candidate neural correlates of perceptual consciousness: An early, occipitally realized component occurring 130-320 ms after stimulus onset and a late, frontally realized component occurring 320-510 ms after stimulus onset. Recent studies have suggested that the late component may not be uniquely related to perceptual...
Cerebral cortex (New York, N.Y. : 1991)
December 1, 2015
Sabine Leske, Philipp Ruhnau, Julia Frey et al.
An ever-increasing number of studies are pointing to the importance of network properties of the brain for understanding behavior such as conscious perception. However, with regards to the influence of prestimulus brain states on perception, this network perspective has rarely been taken. Our recent framework predicts that brain regions crucial for a conscious percept are coupled prior to...
Cerebral cortex (New York, N.Y. : 1991)
May 1, 2014
Jean-Baptiste Eichenlaub, Olivier Bertrand, Dominique Morlet et al.
The neurophysiological correlates of dreaming remain unclear. According to the "arousal-retrieval" model, dream encoding depends on intrasleep wakefulness. Consistent with this model, subjects with high and low dream recall frequency (DRF) report differences in intrasleep awakenings. This suggests a possible neurophysiological trait difference between the 2 groups. To test this hypothesis, we...
Cerebral cortex (New York, N.Y. : 1991)
September 1, 2011
Daniel A Pollen
20 citations
We propose a concise novel conceptual and biological framework for the analysis of primary visual perception (PVP) that refers to the most basic levels of our awake subjective visual experiences. Neural representations for image content elaborated within V1/V2 and the early occipitotemporal (ventral) loop remain only latent with respect to PVP until spatially localized with respect to an...
Cerebral cortex (New York, N.Y. : 1991)
August 1, 2009
Qian Luo, Derek Mitchell, Xi Cheng et al.
What makes us become aware? A popular hypothesis is that if cortical neurons fire in synchrony at a certain frequency band (gamma), we become aware of what they are representing. We tested this hypothesis adopting brain-imaging techniques with good spatiotemporal resolution and frequency-specific information. Specifically, we examined the degree to which increases in event-related...