The headline is a bit “click baity” but it is what a group of researchers found. To be more specific they found in macaques (cute monkeys) in the wild that having more grooming partners grew different regions of the brain. Grooming is the primate version of having a heart-to-heart with a friend, or cuddle with your family or romantic partner.
What is interesting in this research is that it tracked this over time and hence also the growth and development of brain regions over time. Previously we have only been able to associate regions of the brain in animal models and human beings that correlate with sociality.
This is all good and well but it doesn’t give us an indication of causation, a chicken or egg problem: are those with enlarged social regions in the brain more social, or does socialising increase the size of these regions?
These researchers have shown for the first time that grooming, which is an intense form of socialising in macaques does actually grow these regions. And what do these regions do?
Well, the regions that grew were those that are specifically associated with social decision-making and empathy (mid-superior temporal sulcus and ventral-dysgranular insula, if you’re interested).
So, in short, or a more correct headline, is that socialising grows the regions of your brain that are involved in social decision making and empathy.
Probably no bad thing to have!
Reference:
Camille Testard, Lauren J. N. Brent, Jesper Andersson, et al.
Social connections predict brain structure in a multidimensional free-ranging primate society.
Science Advances, 2022; 8 (15)
DOI: 10.1126/sciadv.abl5794
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