ABSTRACT
Dopamine, the main neurotransmitter responsible for reward-based learning in the brain and linked to activation of the sympathetic nervous system, is more widely utilized by extroverts. Use of this neurotransmitter is linked to the need of extroverts to seek others for renewal, as well as their quick thinking, willingness to take risks, and action-oriented behaviors. Introverts tend to utilize acetylcholine as their preferred neurotransmitter. Acetylcholine is also involved in the autonomic nervous system functions, activating many parasympathetic nervous system functions. Extroverts can burn out from the overreliance on the sympathetic nervous system and the resultant desire for continuous stimulation. Introverts can become overly withdrawn when left alone for too long. Extroverts and introverts interact with the world in different and unique ways, including the ways in which they communicate, how they restore their energy reserves, and how they generally behave.
