Reduced Precision Underwrites Ego Dissolution and Therapeutic Outcomes Under Psychedelics

Area of Science:

• Neuroscience
• Psychopharmacology
• Cognitive Science

Background:

• Classic psychedelics are known to alter consciousness and attention.
• Their therapeutic efficacy in internalizing disorders is linked to higher cortical processes.
• Reduced precision in belief updating has been suggested as a key mechanism.

Purpose of the Study:

• To explore the role of reduced Bayesian belief updating precision in psychedelic effects.
• To investigate the common mechanism underlying altered consciousness (ego dissolution) and attention.
• To connect serotonergic receptor activity to large-scale cortical connectivity changes.

Main Methods:

• Review of existing evidence on psychedelic mechanisms.
• Theoretical framework integrating belief updating, consciousness, and attention.
• Consideration of neurobiological evidence linking serotonin receptors and cortical connectivity.

Main Results:

• Psychedelics reduce the precision of belief updating, allowing access to alternate hypotheses.
• This reduced precision is proposed as a common mechanism for altered consciousness and attention.
• Serotonergic pathways are implicated in modulating cortical connectivity, supporting this hypothesis.

Conclusions:

• Reduced precision of Bayesian belief updating is a potential mechanism for psychedelic-induced changes in consciousness and attention.
• This mechanism may underlie the therapeutic benefits of psychedelics for internalizing disorders.
• Further investigation into Bayesian belief updating offers a pathway to understand and modify consciousness and attention.