The cerebellum: a newly discovered circuitry basis for cognitive pain modulation

Chen et al. investigate the neural basis of placebo analgesia in their recent Nature study, revealing the role of the cortico-ponto-cerebellar pathway. Using a placebo analgesia condition animal model, they show that expectations of pain relief are encoded through direct connections from the rostral anterior cingulate cortex (rACC) to the pontine nucleus (PN) and subsequently affect cerebellar regions linked to cognition. The study finds that placebo analgesia enhances rACC neuron activity and boosts calcium signaling in cerebellar Purkinje cells via Oprd1 -expressing PN neurons. These results underscore the cerebellum’s involvement in cognitive pain modulation and suggest that targeting this pathway could offer new approaches for pain relief, including advanced neurostimulation and tailored cognitive therapies.