Scott reviews a theory about serotonin receptors that explains how they help cope with stress, and discusses its implications and limitations. Longer summary

This post reviews a theory about serotonin receptors proposed by Robin Carhart-Harris and David Nutt. The theory focuses on two key receptors: 5-HT1A and 5-HT2A. It suggests that 5-HT1A promotes 'passive coping' (stoicism, bearing stress), while 5-HT2A promotes 'active coping' (increasing brain plasticity to find new solutions). The author finds the theory plausible and explains how it accounts for various effects of antidepressants and psychedelics. However, he also points out some remaining questions and potential biases in the theory. The post combines a detailed explanation of the theory with critical analysis and broader reflections on brain function and drug effects. Shorter summary