Neuroscience shows that loneliness activates many of the same neural pathways as physical pain.  Studies using fMRI scans reveal that social rejection lights up the dorsal anterior cingulate cortex — the part of the brain responsible for the distress of physical hurt.  

Chronic loneliness also increases cortisol, elevates inflammation, and disrupts sleep, focus, and immune function.  Over time, it can raise the risk of depression, anxiety, cardiovascular disease, and cognitive decline.

Connection, on the other hand, signals safety to the nervous system.  It helps regulate emotions, lowers stress hormones, and supports resilience.  Through connection, our brains co-regulate, our bodies relax, and our minds feel at home.