Nostalgia helps decrease activity in pain-related brain areas. Thalamus is responsible for nostalgic information and transmitting it to pain pathways.

Researchers from the Chinese Academy of Sciences measured the brain activity of adults with fMRI while the participants rated the nostalgia levels of images and rated the pain of thermal stimuli.
The nostalgic images featured scenes and items from an average childhood, like a popular candy, cartoon TV show, and schoolyard game.
Images in the control condition depicted corresponding scenes and items from modern life.
Viewing nostalgic images reduced pain ratings compared to viewing control images, with the strongest effect on low intensity pain.
Viewing nostalgic images also reduced activity in the left lingual gyrus and parahippocampal gyrus, two brain regions implicated in pain perception.
Nostalgia may be a drug-free way to alleviate low levels of pain, like headaches or mild clinical pain.
Source-Eurekalert
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