How Does Our Brain Respond When We Help Others?

by Rishika Gupta on  August 31, 2018 at 6:04 PM Research News
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Regions involved in parental care are activated in the brain when we help someone in a very specific manner, finds a new study. The findings of this study are published in the Psychosomatic Medicine: Journal of Biobehavioral Medicine.
 How Does Our Brain Respond When We Help Others?
How Does Our Brain Respond When We Help Others?

By comparison, providing "untargeted" support such as giving to charity does not have the same neurobiological effects, according to the new research by Tristen K. Inagaki, Ph.D., and Lauren P. Ross, BA, of the University of Pittsburgh. "Our results highlight the unique benefits of giving targeted support and elucidate neural pathways by which giving support may lead to health," the researchers write.

Study May Show 'Neural Pathway' By Which Providing Support Improves Health.

The researchers performed a pair of experiments to evaluate brain responses to providing different kinds of social support. In the first study, 45 volunteers performed a "giving support" task where they had a chance to win rewards for someone close to them who needed money (targeted support), for charity (untargeted support), or for themselves. As predicted, participants felt more socially connected and felt that their support was more effective, when giving targeted social support.

The subjects then underwent an emotional rating task including functional MRI scanning to assess activation of specific brain areas when giving social support. Providing support, regardless of who received the support, was linked to increased activation of the ventral striatum (VS) and septal area (SA) - regions previously linked to parental care behaviors in animals. However, only higher activation of the SA when people gave targeted support was associated with lower activity in a brain structure called the amygdala - sometimes linked to fear and stress responses.

In the second study, 382 participants provided information on their behavior in giving support (prosocial behavior) and underwent a different emotional rating task with functional MRI scanning. Once again, those who reported giving more targeted support to others also showed reduced activity in the amygdala. In both studies, giving untargeted support (such as giving to charity) was unrelated to amygdala activity.

"Humans thrive off social connections and benefit when they act in the service of others' well-being," according to the authors. A previous study by Dr. Inagaki, also published in Psychosomatic Medicine, found that giving social support has positive effects on brain areas involved in stress and reward responses. That study suggested that providing support - not just receiving it - may be an important contributor to the physical and mental health benefits of social support.

The new study adds further evidence that giving targeted support may be uniquely beneficial. Both targeted and untargeted support are linked to increased SA activity, supporting the "warm glow" theory of providing support: we help others, directly or indirectly, simply because it "feels good."

But the link between increased SA activation and decreased amygdala activity "suggests a neural pathway by which giving support ultimately influence health that is specific to targeted forms of support-giving, such as giving to specific people we know are in need," Dr. Inagaki and Ms. Ross write. The authors note that their study cannot show a cause-and-effect of providing support on activation of the SA or amygdala. They also point out that providing targeted social support does not always lead to improved health - for example, prolonged caregiving for an ill family member can be detrimental to health.

The study adds to previous evidence that providing social support to others "may be an overlooked contributor to the well-known link between social ties and health," Dr. Inagaki and Ms. Ross write. They conclude: "Giving targeted support to an identifiable individual in need is uniquely associated with reduced amygdala activity thereby contributing to the understanding of how and when giving support may lead to health."

Source: Eurekalert

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