It really is true: When our friends hurt, we hurt.


Research published in the journal Social Cognitive and Affective Neuroscience[1] shows that the reason humans feel empathy toward friends is because we associate others close to us with our own selves.


"A threat to ourselves is a threat to our resources," study research James Coan, a psychology professor at the University of Virginia, said in a statement. "Threats can take things away from us. But when we develop friendships, people we can trust and rely on who in essence become we, then our resources are expanded, we gain. Your goal becomes my goal[2] . It's a part of our survivability."


Coan and colleagues conducted fMRI brain scans on 22 young adults for the study. As the study participants were undergoing the brain scans, they were told that they were under threat of either receiving an electrical shock themselves, or that their friend or a stranger was under threat of being shocked.


Not surprisingly, the study participants' anterior insula, putamen and supramarginal gyrus brain regions -- which all play a role in responding to threats -- activated when they were threatened of being shocked themselves.


But interestingly, when the study participants were told that their friends were in danger of receiving an electrical shock, these brain regions activated in the same way as when they were threatened with the shock themselves. However, there was little brain activation in these regions when they were told the stranger was in danger of electrical shock.


"The correlation between self and friend was remarkably similar," Coan said in the statement. "The finding shows the brain's remarkable capacity to model self to others; that people close to us become a part of ourselves, and that is not just metaphor or poetry, it's very real. Literally we are under threat when a friend is under threat. But not so when a stranger is under threat."



Also on HuffPost:




Loading Slideshow...



  • Friends Get You Moving


    Research presented in 2012 found that something you might expect more from your mother -- nagging -- can actually work when it's coming from a pal who's pushing you to move more.

    In fact, the least active interviewees in this particular survey said they <a href="http://www.sciencedaily.com/releases/2012/04/120418134852.htm" target="_hplink">needed and even <em>appreciated</em> a nudge</a> now and then from friends.

    And working out with a friend has the added benefit of keeping you committed to your workout plan. There's no rolling over to hit the snooze button on that a.m. run if someone is waiting for you to show up!

    <em>Flickr photo by <a href="http://www.flickr.com/photos/geishaboy500/272639168/" target="_hplink">geishaboy500</a></em>




  • Friends Keep You Relaxed


    There's some truth behind friendship clichés like "a shoulder to cry on." In the face of great stress, talking with and leaning on friends really can help you get through troublesome times.

    A 2011 study found that among students, <a href="http://www.sciencedaily.com/releases/2011/10/111026091229.htm" target="_hplink">friendships helped reduce some of the stress of being bullied</a> or excluded at school.

    Women in particular may be predisposed to the calming benefits of friendship. Researchers found that <a href="http://www.sfgate.com/opinion/article/Fight-stress-with-friends-2858415.php" target="_hplink">females release the hormone oxytocin when stressed</a>, which encourages "tend and befriend" behavior, rather than the "fight or flight" reaction often observed in men, the <em>San Francisco Chronicle</em> reported. This encourages women to chat with their friends when stressed, and the chatting itself spurs the release of <em>more</em> oxytocin, which can have a calming effect.

    <em>Flickr photo by <a href="http://www.flickr.com/photos/epsos/4933098878/" target="_hplink">epSos.de</a></em>




  • Friends Help You Live Longer


    It's not quite as simple as connecting with friends and, poof, you're guaranteed to live to 100. But there <em>is</em> a significant body of research linking strong social ties to a longer lifespan.

    Australian research found that <a href="http://jech.bmj.com/content/59/7/574.abstract?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&fulltext=friends&andorexactfulltext=and&searchid=1&FIRSTINDEX=0&sortspec=date&resourcetype=HWCIT" target="_hplink">older adults with more friends were 22 percent less likely to die</a> during a 10-year study than their peers with fewer friends.

    And in a recent analysis of 148 studies, researchers found that people with stronger relationships had a <a href="http://www.plosmedicine.org/article/info:doi/10.1371/journal.pmed.1000316" target="_hplink">50 percent greater chance of survival</a>.

    <em>Flickr photo by <a href="http://www.flickr.com/photos/gribanov/" target="_hplink">egor.gribanov</a></em>




  • Friends Boost Cancer Survival Rates


    While friendships may help you live longer in any situation, social ties have also been linked specifically to overcoming cancer.

    A small 2005 study observed 61 women with advanced ovarian cancer. <a href="http://onlinelibrary.wiley.com/doi/10.1002/cncr.21147/abstract" target="_hplink">Higher levels of interleukin 6</a>, a protein marker for a more aggressive form of the disease, were found in the women with the weakest social bonds.

    An older study followed 86 women with metastatic breast cancer for a year and found that the women who participated in a weekly support group <a href="http://www.ncbi.nlm.nih.gov/pubmed/2571815" target="_hplink">lived twice as long</a>.




  • Friends Lower Heart Disease Risk


    Perhaps because of their relaxation powers, friends are also good for the heart. A 2005 analysis of social support theories found that weak social ties could <a href="http://www.ncbi.nlm.nih.gov/pubmed/16314591" target="_hplink"><em>double</em> heart disease risk</a>.

    The link between social support and a healthy heart is even stronger for men who make one very special social tie official. <a href="http://www.webmd.com/balance/news/20041108/social-ties-guard-against-heart-disease" target="_hplink">Married men</a> seem to experience a particular boost in heart health, WebMD reported.

    Stronger social ties in general seem to lower blood pressure, which helps the heart.

    <em>Flickr photo by <a href="http://www.flickr.com/photos/brentgambrell/4415887276/" target="_hplink">Brent Gambrell</a></em>