Awareness and consciousness in humans and animals – neural and behavioral correlates in an evolutionary perspective DOI Creative Commons
Günter Ehret, R. Romand

Frontiers in Systems Neuroscience, Journal Year: 2022, Volume and Issue: 16

Published: July 14, 2022

Awareness or consciousness in the context of stimulus perception can directly be assessed well controlled test situations with humans via persons' reports about their subjective experiences stimuli. Since we have no direct access to animals, possible awareness tasks has often been inferred from behavior and cognitive abilities previously observed aware conscious humans. Here, analyze published human data primarily on event-related potentials brain-wave generation during responding sensory stimuli extract neural markers (mainly latencies evoked-potential peaks gamma-wave occurrence) indicating that a person became perceived stimulus. These correlates were then applied sets corresponding various animals including several species mammals, one each birds, fish, cephalopods, insects. We found studies could also successfully mammal bird suggesting these animal groups become subjectively Fish, cephalopod insect remained inconclusive. In an evolutionary perspective consider both appear as evolved, attention-dependent options added ongoing activities processing action generation. for functional coupling brain areas aware/conscious states is energetically highly cost-intensive, it remains shown which under conditions lifestyle ecological niche may achieve significant advantages reproductive fitness by drawing upon options. Hence, started our discussion question how far expressions activity are necessary attributes perceiving adaptive way.

Language: Английский

Expectations of reward and efficacy guide cognitive control allocation DOI Creative Commons
Romy Frömer, Hause Lin,

Carolyn K. Dean Wolf

et al.

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Feb. 15, 2021

The amount of mental effort we invest in a task is influenced by the reward can expect if perform that well. However, some rewards have greatest potential for driving these efforts are partly determined factors beyond one's control. In such cases, has more limited efficacy obtaining rewards. According to Expected Value Control theory, people integrate information about expected and performance determine value control, then adjust their control allocation (i.e., effort) accordingly. Here test this theory's key behavioral neural predictions. We show participants cognitive when rewarding efficacious, incentive components separately modulate EEG signatures evaluation proactive allocation. Our findings support prediction combine expectations how much invest.

Language: Английский

Citations

202
Bifurcation in brain dynamics reveals a signature of conscious processing independent of report DOI Creative Commons
Claire Sergent,

Martina Corazzol,

Ghislaine Labouret

et al.

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Feb. 19, 2021

An outstanding challenge for consciousness research is to characterize the neural signature of conscious access independently any decisional processes. Here we present a model-based approach that uses inter-trial variability identify brain dynamics associated with stimulus processing. We demonstrate that, even in absence task or behavior, electroencephalographic response auditory stimuli shows bifurcation around 250-300 milliseconds post-stimulus. Namely, same gives rise late sustained activity on some trials, and not others. This predictive task-related reports, also reports contents are randomly sampled during task-free listening. Source localization further suggests recruits networks as those explicit report, except frontal executive components. Studying through could thus play key role identifying core signatures access, independent report.

Language: Английский

Citations

170
ERP and MEG correlates of visual consciousness: The second decade DOI
Jona Förster, Mika Koivisto, Antti Revonsuo

et al.

Consciousness and Cognition, Journal Year: 2020, Volume and Issue: 80, P. 102917 - 102917

Published: March 16, 2020

Language: Английский

Citations

149
Perceptual awareness negativity: a physiological correlate of sensory consciousness DOI

Cole Dembski,

Christof Koch, Michael Pitts

et al.

Trends in Cognitive Sciences, Journal Year: 2021, Volume and Issue: 25(8), P. 660 - 670

Published: June 23, 2021

Language: Английский

Citations

130
Human visual consciousness involves large scale cortical and subcortical networks independent of task report and eye movement activity DOI Creative Commons
Sharif I. Kronemer,

Mark Aksen,

Julia Z. Ding

et al.

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Nov. 29, 2022

The full neural circuits of conscious perception remain unknown. Using a visual task, we directly recorded subcortical thalamic awareness potential (TAP). We also developed unique paradigm to classify perceived versus not stimuli using eye measurements remove confounding signals related reporting on experiences. fMRI, discovered three major brain networks driving independent report: first, increases in signal detection regions visual, fusiform cortex, and frontal fields; arousal/salience involving midbrain, thalamus, nucleus accumbens, anterior cingulate, insula; second, frontoparietal attention executive control the cerebellum; finally, decreases default mode network. These results were largely maintained after excluding movement-based fMRI changes. Our findings provide evidence that neurophysiology consciousness is complex even without overt report, multiple cortical overlapping space time.

Language: Английский

Citations

61
Decoding perceptual awareness across the brain with a no-report fMRI masking paradigm DOI Creative Commons
Elaheh Hatamimajoumerd, N. Apurva Ratan Murty, Michael Pitts

et al.

Current Biology, Journal Year: 2022, Volume and Issue: 32(19), P. 4139 - 4149.e4

Published: Aug. 17, 2022

Does perceptual awareness arise within the sensory regions of brain or higher-level (e.g., frontal lobe)? To answer this question, researchers traditionally compare neural activity when observers report being aware versus unaware a stimulus. However, it is unclear whether resulting activations are associated with conscious perception stimulus post-perceptual processes reporting that address limitation, we used both and no-report conditions in visual masking paradigm while participants were scanned using functional MRI (fMRI). We found overall univariate response to visible stimuli lobe was robust condition but disappeared condition. multivariate patterns, could still decode reached across brain, including lobe. These results help reconcile key discrepancies recent literature provide path forward for identifying mechanisms awareness.

Language: Английский

Citations

50
Consciousness as a natural kind and the methodological puzzle of consciousness DOI
Henry Taylor

Mind & Language, Journal Year: 2022, Volume and Issue: 38(2), P. 316 - 335

Published: April 7, 2022

A new research programme conceives of consciousness as a natural kind. One proposed virtue this approach is that it can help resolve the methodological puzzle consciousness, which involves distinguishing from cognitive access. The present article raises novel problem for approach. rooted in fact there may be episodes conscious experience have not been classified such. I argue conceiving kind cannot distinguish

Language: Английский

Citations

44
Consciousness as a Memory System DOI
Andrew E. Budson, Kenneth A. Richman, Elizabeth A. Kensinger

et al.

Cognitive and Behavioral Neurology, Journal Year: 2022, Volume and Issue: unknown

Published: Sept. 30, 2022

We suggest that there is confusion between why consciousness developed and what additional functions, through continued evolution, it has co-opted. Consider episodic memory. If we believe memory evolved solely to accurately represent past events, seems like a terrible system-prone forgetting false memories. However, if flexibly creatively combine rearrange memories of prior events in order plan for the future, then quite good system. argue originally as part system-quite likely needed accomplish flexible recombining information. posit further was subsequently co-opted produce other functions are not directly relevant per se, such problem-solving, abstract thinking, language. this theory compatible with many phenomena, slow speed after-the-fact consciousness, cannot be explained well by theories. our may have profound implications understanding intentional action general. Moreover, its associated systems sensory, working, semantic whole ought considered together conscious system they, together, give rise phenomenon consciousness. Lastly, cerebral cortex brain makes possible, every cortical region contributes

Language: Английский

Citations

44
Towards a pluralistic neurobiological understanding of consciousness DOI Creative Commons
Biyu J. He

Trends in Cognitive Sciences, Journal Year: 2023, Volume and Issue: 27(5), P. 420 - 432

Published: Feb. 25, 2023

Language: Английский

Citations

42
Constructing Experience DOI Creative Commons
Jason Clarke

Published: Jan. 30, 2025

This Element examines the influence of expectation and attention on conscious perception. It explores debate whether is necessary for perception by presenting empirical evidence from studies inattentional blindness, change attentional blink. While strongly suggests that perception, other research has shown can shape sometimes leading to illusory experiences where predicted stimuli are perceived despite their absence. phenomenon, termed 'expectation awareness', may not be all experiences. These findings explored within predictive processing framework, brain characterized as a prediction engine, continuously updating its internal models minimize errors. Integrating psychology, neuroscience, cognitive science, this provides model how construct perceptual reality. also discusses clinical theoretical implications future research.

Language: Английский

Citations

2