Source: University of Pennsylvania.

Pain can be valuable. Without it, we might let our hand linger on a hot stove, for example. But longer-lasting pain, such as the inflammatory pain that can arise after injury, can be debilitating and costly, preventing us from completing important tasks. In natural settings, the lethargy triggered by such pain could even hinder survival.

According to research by University of Pennsylvania neuroscientists, the brain has a way to suppress chronic pain when an animal is hungry, allowing it to go look for food while leaving intact the response to acute pain. Their work pinpointed a tiny population of 300 brain cells responsible for the ability to prioritize hunger over chronic pain, a group of neurons that may offer targets for novel pain…