"The current work started when Nitsan Goldstein, who was a graduate student in Betley’s lab at the time, found that other urgent survival needs such as thirst and fear can also reduce enduring pain. That finding supported behavioral models developed in collaboration with the Kennedy lab at Scripps, suggest filtering of sensory input at the parabrachial nucleus can block out long-lasting pain when other more acute needs exist.
“That told us the brain must have a built-in way of prioritizing urgent survival needs over pain, and we wanted to find the neurons responsible for that switch,” says Goldstein."
I suffer from frequent headaches, as one way to deal with it I sometimes try to find something that will cause me a different type of discomfort, such as walking several miles. Usually works, eventually.
That's interesting about walking. I've done longish walking pilgrimages lasting several weeks (Camino etc.) and some stomach problems and joint problems improved a lot. I usually walked about 25km a day - I realise that's longer walking than what you mentioned.
There are some books about walking putting illness into remission. A famous one is "The Salt Path" where someone with "corticobasal degeneration" brain disease was positively impacted by their walk. (Although the claims are in doubt now because the main author wasn't truthful about other aspects of their walk)
I wonder if more light exposure during walking is also a factor? Many folks don’t get enough vitamin D, and light therapy for SAD and other conditions has shown promise as well. I’ve also noticed that 25km+ of daily backpacking for a few weeks continuously helped my overall fitness and wellness, though I don’t have any chronic conditions or ailments at all to speak of. I do question whether many folks would invest the time and effort to do the work, even if they desire the benefits of the exertion.
“That told us the brain must have a built-in way of prioritizing urgent survival needs over pain, and we wanted to find the neurons responsible for that switch,” says Goldstein."