Physiological Differences Between Introverts and Extroverts

I see lots of posts where someone who is extroverted talks about becoming an introvert because they no longer want to be around people, or introverts becoming extroverts since they now enjoy talking to people, when they didn’t before. However, it’s important to keep in mind there is a lot more to introversion and extroversion than simply wanting to talk to people or not, and even more to it than the abstract idea of “energy.” There are scientific, verifiable physical differences in the brains of introverts and extroverts, which then affect their behaviors, leading to the side effects that we notice, such as sociability or spontaneity.

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