It is more active in the brains of extroverts than in the brains of introverts as Scott Barry Kaufman, the Scientific Director of At the expectation of, say, getting the phone number of an attractive person or earning a promotion at work, extroverts become more energized than introverts.They buzz with an enthusiastic rush of good feelings, while introverts feel overstimulated.Both introverts and extroverts use both sides of their nervous systems at different times, just like they use both neurotransmitters.
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When I lounge at home in quiet solitude, lost in a book or watching Netflix, I’m basking in the pleasant effects of acetylcholine. Acetylcholine is linked to the parasympathetic side of the nervous system, which is nicknamed the “throttle down” or “rest-and-digest” side.
When we engage the parasympathetic side, our body conserves energy, and we withdraw from the outer environment.
I was having fun for a while, but now I’m ready to head home and find my bed.
The loud music, the dense crowd of strangers, and the small talk I’ve made all night have left me feeling drained.
Just me, no noise, maybe a good book or the Internet to help me turn inward and recharge after this much socializing.
Yet, my extroverted friends could probably stay at the concert, chatting long past the encore.
When dopamine floods the brain, both introverts and extroverts become more talkative, alert to their surroundings, and motivated to take risks and explore the environment.
It’s not that introverts have less dopamine present in their brains than extroverts do.
Yet, given how my introverted brain works, it makes sense that after a few hours of stimulation and socializing, I needed to get out of there.
It’s not that I dislike people; it’s just that socializing is more effortful and tiring for me than it is for extroverts.
Blood sugar and free fatty acids are elevated to give us more energy, and digestion is slowed.