This program is grounded in research on behavior change, cognitive flexibility, and neurological growth. Below are selected articles and resources for those who want to explore further.
1. Impact of psilocybin on cognitive function
Cognitive flexibility and creative cognition were noted to initially decline but could potentially improve over time. Additionally, with respect to learning and memory skills, psilocybin showed promise in improving specific memory types such as semantic associations and associative learning, while its effects on episodic and verbal memory have been less pronounced compared to other cognitive enhancers. The observed mixed findings underscore the complexity of psilocybin's cognitive influence. Further research is essential to provide a clearer understanding of psilocybin's impact on cognitive domains and to guide the development of safe and effective interventions.
2. Psilocybin therapy increases cognitive and neural flexibility in patients with major depressive disorder
Surprisingly, greater increases in dFC between the ACC and PCC were associated with less improvement in cognitive flexibility after psilocybin therapy. Connectome-based predictive modeling demonstrated that baseline dFC emanating from the ACC predicted improvements in cognitive flexibility. In these models, greater baseline dFC was associated with better baseline cognitive flexibility but less improvement in cognitive flexibility. These findings suggest a nuanced relationship between cognitive and neural flexibility. Whereas some enduring increases in neural dynamics may allow for shifting out of a maladaptively rigid state, larger persisting increases in neural dynamics may be of less benefit to psilocybin therapy.
Psilocybin caused persistent decrease in FC between the anterior hippocampus and default mode network, lasting for weeks. Persistent reduction of hippocampal-default mode network connectivity may represent a neuroanatomical and mechanistic correlate of the proplasticity and therapeutic effects of psychedelics.
Psilocybin caused major changes in functional connectivity, or FC—a measure of how activity in different regions of the brain is correlated—throughout the brain. These regions included most of the cerebral cortex, thalamus, hippocampus, and cerebellum. The changes were more than 3 times greater than those caused by a control compound, methylphenidate (a stimulant used to treat attention deficit hyperactivity disorder). Psilocybin induced the largest changes in areas involved in the default mode network. This network is usually most active when the brain isn’t focused on a specific task. It is thought to govern people’s sense of space, time, and self.
5. Psilocybin triggers an activity-dependent rewiring of large-scale cortical networks
Psilocybin’s effect on connectivity is network specific, strengthening the routing of inputs from perceptual and medial regions (homolog of the default mode network) to subcortical targets while weakening inputs that are part of cortico-cortical recurrent loops. The pattern of synaptic reorganization depends on the drug-evoked spiking activity because silencing a presynaptic region during psilocybin administration disrupts the rewiring. Collectively, the results reveal the impact of psilocybin on the connectivity of large-scale cortical networks and demonstrate neural activity modulation as an approach to sculpt the psychedelic-evoked neural plasticity.
The research suggests that psychedelic compounds temporarily reduce the separation between how we think and how we perceive, which could explain the neurological mechanics behind the sensory distortions, mystical experiences and ego dissolution that patients report during sessions.
7. Psilocybin generates psychedelic experience by disrupting brain network
In a new study, researchers at Washington University School of Medicine in St. Louis report that psilocybin, the active compound in magic mushrooms, temporarily scrambles a critical network of brain areas involved in introspective thinking such as daydreaming and remembering. The findings provide a neurobiological explanation for the drug’s mind-bending effects and lay some of the groundwork for the development of psilocybin-based therapies for mental illnesses such as depression and post-traumatic stress disorder.
8. Research Shows Impact of Psilocybin on Brain Connectivity
The study, published in Cell, found that psilocybin weakens cortico-cortical feedback loops that can trap individuals in cycles of negative thinking. At the same time, the psychedelic strengthens pathways linking sensory regions to subcortical areas responsible for turning perception into movement. This dual action enhances sensory-motor responses and may help explain why psilocybin shows lasting therapeutic effects in people with depression.
