Natural Health News — “Sticks and stones may break my bones, but words will never hurt me”.
That playground rhyme is supposed to help children endure teasing and taunts from classmates. But a new study suggests that our response to hurtful words is much more complex, and that the brain may have its own way of easing social pain.
The findings, recently published in Molecular Psychiatry by a University of Michigan Medical School team, show that the brain’s natural painkiller system responds to painful words and social rejection in much the same way it responds to physical injury.
In addition, those who possess a character trait defined as ‘resilience’ – the ability to adjust to environmental change – showed the highest amount of natural painkiller activation.
The research team used an innovative approach to make its findings. They combined advanced brain scanning that can track chemical release in the brain with a model of social rejection based on online dating.
They focused on an area of the brain called the mu-opioid receptor system – the same system that the team has studied for years in relation to response to physical pain.
Over more than a decade, work at the University of Michigan has shown that when a person feels physical pain, their brain releases chemicals called opioids into the space between neurons, dampening pain signals.
David T Hsu, PhD, a research assistant professor of psychiatry and the lead author of the new paper, says “This is the first study to peer into the human brain to show that the opioid system is activated during social rejection,”
“In general, opioids have been known to be released during social distress and isolation in animals, but where this occurs in the human brain has not been shown until now.”
The pain of rejection
The study involved 18 adults who were asked to view photos and fictitious personal profiles of hundreds of other adults. Each selected some who they might be most interested in romantically – a setup similar to online dating.
But then, when the participants were lying in a brain imaging machine called a PET scanner, they were informed that the individuals they found attractive and interesting were not interested in them.
Brain scans made during these moments showed opioid release, measured by looking at the availability of mu-opioid receptors on brain cells. The effect was largest in the brain regions called the ventral striatum, amygdala, midline thalamus, and periaqueductal gray – areas that are also known to be involved in physical pain.
The researchers had actually made sure the participants understood ahead of time that the “dating” profiles were not real, and neither was the “rejection.” But nonetheless, the simulated social rejection was enough to cause both an emotional and opioid response.
Suffering slings and arrows differently
Hsu notes that the underlying personality of the participants appeared to play a role in how much of a response their opioid systems made.
“Individuals who scored high for the resiliency trait on a personality questionnaire tended to be capable of more opioid release during social rejection, especially in the amygdala,” a region of the brain involved in emotional processing, Hsu says. “This suggests that opioid release in this structure during social rejection may be protective or adaptive.”
The more opioid release during social rejection in another brain area called the pregenual cingulate cortex, the less the participants reported being put in a bad mood by the news that they’d been snubbed.
The researchers also examined what happens when the participants were told that someone they’d expressed interest in had expressed interest in them – social acceptance. In this case, some brain regions also had more opioid release. “The opioid system is known to play a role in both reducing pain and promoting pleasure, and our study shows that it also does this in the social environment,” says Hsu.
Not all in our heads
The new research could be important in understanding whether those who are vulnerable to, or currently suffering from depression or social anxiety have an abnormal opioid response to social rejection and/or acceptance
“It is possible that those with depression or social anxiety are less capable of releasing opioids during times of social distress, and therefore do not recover as quickly or fully from a negative social experience. Similarly, these individuals may also have less opioid release during positive social interactions, and therefore may not gain as much from social support,” Hsu theorizes.
If nothing else, perhaps knowing that our response to a social snub isn’t “all in our heads” can help some people understand their responses and cope better, Hsu says. “The knowledge that there are chemicals in our brains working to help us feel better after being rejected is comforting.”
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