Introverts and Extroverts
It’s not just about how shy or outgoing you are. Belle Beth Cooper explains:
The nucleus accumbens is part of the dopamine system, which affects how we learn, and is generally known for motivating us to search for rewards. The difference in the dopamine system in the extrovert’s brain tends to push them towards seeking out novelty, taking risks, and enjoying unfamiliar or surprising situations more than others. The amygdala is responsible for processing emotional stimuli, which gives extroverts that rush of excitement when they try something highly stimulating that might overwhelm an introvert.
More research has actually shown that the difference comes from how introverts and extroverts process stimuli. That is, the stimulation coming into our brains is processed differently depending on your personality. For extroverts, the pathway is much shorter. It runs through an area where taste, touch, and visual and auditory sensory processing takes place. For introverts, stimuli run through a long, complicated pathway in areas of the brain associated with remembering, planning, and solving problems.
via Kottke