Psychedelic Brain Science

The biological mechanics of how classic psychedelics influence human neurobiology involve primary interactions at serotonin 5-HT2A receptors on cortical neurons. These cellular zaps adjust membrane potential thresholds, increasing neuronal excitability and triggering cascading electrochemical action potentials across interconnected neural networks. At a macro scale, this action disrupts typical functional modularity and enhances cross-talk between usually isolated brain regions. The resulting surge in neural entropy temporary alters processing in the visual and auditory cortexes, temporal systems, frontoparietal executive networks, and the default mode network. This network relaxation breaks down habitual autobiographical thought patterns and spatial self-representation, contributing to experiences like visual hallucinations, time dilation, and ego dissolution.