Introvert and Extrovert Brains Are Different

This is one of the most amazing discoveries that I found in my research on introverts.  Our brains work in very different ways!

Introverts brains are more focused on acetylcholine and extroverts are focused on dopamine and adrenaline (thus the need for more excitement).  Introverts have more blood flow in the brain and use a longer pathway to process input (which is probably why we have issues "talking off the cuff" in front of large audiences).

http://musingsonmormonism.wordpress.com/2012/09/17/easily-the-most-fascintaing-and-illuminating-comparison-of-introversion-and-extroversion-ive-ever-seen/