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Sympathetic (fight or flight) vs para sympathetic (slow down). Introverts have a dominant para sympathetic and extroverts have a dominant sympathetic system. Extroverts thrive on dopamine and introverts thrive on acetycholine nuerotransmitter. From the book "The Introvert Advantage" by Marti Laney


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Lisa Landy

You may be able to spot an introvert by the fact that they're a.) not at the party or b.) that they brought a book and/or have made best friends with the host's dog or cat at said party.


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