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The source article is a small research article sampling young adults who were students in college. The article itself addresses the scope of its findings aptly:

Although these results suggest a link between political attitudes and brain structure, it is important to note that the neural processes implicated are likely to reflect complex processes of the formation of political attitudes rather than a direct representation of political opinions per se. The conceptualizing and reasoning associated with the expression of political opinions is not necessarily limited to structures or functions of the regions we identified but will require the involvement of more widespread brain regions implicated in abstract thoughts and reasoning.

We speculate that the association of gray matter volume of the amygdala and anterior cingulate cortex with political attitudes that we observed may reflect emotional and cognitive traits of individuals that influence their inclination to certain political orientations.

I don’t think it is a good idea to base your opinion of political bias and brain chemistry on a single article’s speculation.

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astraeus@programming.dev ⁨1⁩ ⁨year⁩ ago
This is the foundation for the research article listed in the March 2013 NBC article.

Fourth paragraph of introduction starts:

The discovery by Kanai and colleagues [15] that four brain regions implicated in risk and uncertainty (the right amygdala, left insula, right entorhinal cortex, and anterior cingulate (ACC)) differed in liberals and conservatives provided further evidence that political ideology might be connected to differences in cognitive processes.

Same paragraph concludes:

The ACC is involved in conflict and error monitoring and in action selection [21], [22]. Thus, the regions implicated in risk and conflict, cognitive processes during which liberals and conservatives have been shown to differ in physiological response, are the similar regions shown by Kanai et al. to differ structurally in liberals and conservatives. If patterns of brain activity in these regions during the evaluation of risks could dependably differentiate liberals and conservatives, then we would have further evidence of the link between mental processes and political preferences.

Conclusion of the introduction:

Previous studies [26]–[28] using this risk-taking decision-making task found activity in some of the same regions identified by Kanai et al. as differentiating liberals and conservatives.

Honestly, I think their finding is more accurately conveyed with this sample:

Although genetic variation has been shown to contribute to variation in political ideology [48] and strength of partisanship [53], the portion of the variance in political affiliation explained by activity in the amygdala and insula is significantly larger (see Appendix S1), suggesting that acting as a partisan in a partisan environment may alter the brain, above and beyond the effect of the heredity.

The argument here is not so much that brain chemistry predicts political bias, but rather that political bias can influence brain chemistry.

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- givesomefucks@lemmy.world ⁨1⁩ ⁨year⁩ ago
  I shouldn’t be surprised all these people couldn’t keep their emotion in check for the 2 minutes to check if someone else already tried an excuse before scrolling down and seeing that someone else already tried an excuse and it failed…
  
  But I still am.
  
  Everytime I’ve ever brought this up, it pisses off a lot of people who don’t even try to explain it.
  
  Hint: I already told people there’s a decade of follow up studies.
  
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