Researchers studying chronic pain found a brain pathway that may explain why pain keeps going long after an injury should have healed
Space Daily • • science
Key Points:
- Chronic pain can persist beyond tissue healing because the nervous system may actively maintain pain signals, rather than pain being a passive response to injury.
- Researchers have identified the caudal granular insular cortex as a brain region influencing whether pain fades or becomes chronic; blocking this pathway in animal studies reduced chronic pain.
- The vagus nerve plays a complex role in pain regulation by affecting inflammation, arousal, and interoception, but current evidence does not support simplistic claims that vagus nerve stimulation automatically accelerates healing.
- Non-invasive vagus nerve stimulation (taVNS) shows promise in improving symptoms like fatigue, insomnia, and motor function in specific patient groups, though its effects on general injury recovery remain unproven.
- Ongoing clinical trials, such as those testing vagus nerve stimulators for autoimmune diseases like multiple sclerosis, highlight the nerve’s potential role in modulating inflammation and chronic pain, but more research is needed before broad clinical application.