A decision-theoretic model of multistability: perceptual switches as internal actions DOI Creative Commons
Shervin Safavi, Peter Dayan

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 11, 2024

Abstract Perceptual multistability has been studied for centuries using a diverse collection of approaches. Insights derived from this phenomenon range core principles information processing, such as perceptual inference, to high-level concerns, visual awareness. The dominant computational explanations are based on the Helmholtzian view perception inverse inference. However, these approaches struggle account crucial role played by value, e.g., with percepts paired reward dominating longer periods than unpaired ones. In study, we formulate in terms dynamic, value-based, choice, employing formalism partially observable Markov decision process (POMDP). We use binocular rivalry an example, considering different explicit and implicit sources (and punishment) each percept. resulting values time-dependent influenced novelty form exploration. solution POMDP is optimal policy, show that can replicate explain several characteristics rivalry, ranging classic hallmarks apparently spontaneous random switches approximately gamma-distributed dominance more subtle aspects rich temporal dynamics switching rates. Overall, our decision-theoretic perspective not only accounts wealth unexplained data, but also opens up modern conceptions internal reinforcement learning service understanding phenomena, sensory processing generally.

Language: Английский

Thalamic contributions to the state and contents of consciousness DOI Creative Commons
Christopher J. Whyte, Michelle J. Redinbaugh, James M. Shine

et al.

Neuron, Journal Year: 2024, Volume and Issue: 112(10), P. 1611 - 1625

Published: May 1, 2024

Consciousness can be conceptualized as varying along at least two dimensions: the global state of consciousness and content conscious experience. Here, we highlight cellular systems-level contributions thalamus to then argue for thalamic content, including integrated, segregated, continuous nature our We underscore vital, yet distinct roles core- matrix-type neurons. Through reciprocal interactions with deep-layer cortical neurons, matrix neurons support wakefulness determine perceptual thresholds, whereas core maintain enable constancy. further propose that integration, segregation, continuity depend on convergent corticothalamic projections enabling dimensionality reduction, a reticular nucleus-mediated divisive normalization-like process, sustained coherent activity in thalamocortical loops, respectively. Overall, conclude plays central topological role brain structures controlling

Language: Английский

Citations

20
Human high-order thalamic nuclei gate conscious perception through the thalamofrontal loop DOI
Zepeng Fang, Yuanyuan Dang,

An’an Ping

et al.

Science, Journal Year: 2025, Volume and Issue: 388(6742)

Published: April 4, 2025

Human high-order thalamic nuclei activity is known to closely correlate with conscious states. However, it not clear how those and thalamocortical interactions directly contribute the transient process of human perception. We simultaneously recorded stereoelectroencephalography data from prefrontal cortex (PFC), while patients implanted electrodes performed a visual consciousness task. Compared ventral PFC, intralaminar medial presented earlier stronger consciousness-related activity. Transient thalamofrontal neural synchrony cross-frequency coupling were both driven by θ phase during The thus play gate role drive PFC emergence

Language: Английский

Citations

1
The brain that controls itself DOI Creative Commons
Eli J. Műller, Brandon R. Munn, James M. Shine

et al.

Current Opinion in Behavioral Sciences, Journal Year: 2025, Volume and Issue: 63, P. 101499 - 101499

Published: March 12, 2025

Language: Английский

Citations

0
A decision-theoretic model of multistability: perceptual switches as internal actions DOI Creative Commons
Shervin Safavi, Peter Dayan

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 11, 2024

Abstract Perceptual multistability has been studied for centuries using a diverse collection of approaches. Insights derived from this phenomenon range core principles information processing, such as perceptual inference, to high-level concerns, visual awareness. The dominant computational explanations are based on the Helmholtzian view perception inverse inference. However, these approaches struggle account crucial role played by value, e.g., with percepts paired reward dominating longer periods than unpaired ones. In study, we formulate in terms dynamic, value-based, choice, employing formalism partially observable Markov decision process (POMDP). We use binocular rivalry an example, considering different explicit and implicit sources (and punishment) each percept. resulting values time-dependent influenced novelty form exploration. solution POMDP is optimal policy, show that can replicate explain several characteristics rivalry, ranging classic hallmarks apparently spontaneous random switches approximately gamma-distributed dominance more subtle aspects rich temporal dynamics switching rates. Overall, our decision-theoretic perspective not only accounts wealth unexplained data, but also opens up modern conceptions internal reinforcement learning service understanding phenomena, sensory processing generally.

Language: Английский

Citations

0