A new study shows that feelings of nostalgia, triggered by viewing old photos and videos, can help alleviate common headaches by reducing brain activity, researchers say.The report found that both male and female participants had reduced pain perceptions, particularly at "low pain intensity" when experiencing nostalgia. The absence of pain was associated with decreased activity in two pain-related brain regions, the study noted.The study, conducted by psychologists and neuroscientists at the Chinese Academy of Sciences in Beijing, was recently published in the journal Neuroscience.

Participants were connected to an fMRI machine, a functional magnetic resonance imaging camera that measures brain activity, and shown a series of 26 nostalgic images, including old cartoons, schoolyard games and favorite and popular sweets.The participants were then exposed to varying levels of pain using a small heat generator on their right forearm. Their brain activity was compared with readings from a control group, showing images from modern life that evoked no feelings of nostalgia.People who were shown the childhood images felt lower levels of pain while experiencing reduced activity in two brain regions.

Also read: Harvard nutritionist shares the 6 best foods for the brain: "Most people don't eat enough"In their report, the researchers noted that nostalgia has long been known to reduce individuals' perception of physical pain, but the scientific reason behind it was "unclear." A 2012 study by psychologists at Sun Yat-Sen University in Guangzhou, China, found that participants in a nostalgic state “were able to keep their hand in a bucket of ice water for a longer period of time compared to other participants.Now, the Beijing-based team is saying why that is."Our study revealed that the thalamus plays a key role as a functional link between nostalgia and pain, suggesting a potential analgesic modulating mechanism of nostalgia," they write. Or, in other words, feelings of nostalgia and pain come.

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