Carl King has a list of myths that are somewhat widely believed about that odd class of people, the introverts:
I wrote this list in late-2008. Around that time, I was lucky enough to discover a book called, The Introvert Advantage (How To Thrive in an Extrovert World), by Marti Laney, Psy.D. It felt like someone had written an encyclopedia entry on a rare race of people to which I belong. Not only had it explained many of my eccentricities, it helped me to redefine my entire life in a new and productive context.
Sure, anyone who knows me would say, “Duh! Why did it take you so long to realize you’re an Introvert?” It’s not that simple. The problem is that labeling someone as an Introvert is a very shallow assessment, full of common misconceptions. It’s more complex than that.
A section of Laney’s book (page 71 through page 75) maps out the human brain and explains how neuro-transmitters follow different dominant paths in the nervous systems of Introverts and Extroverts. If the science behind the book is correct, it turns out that Introverts are people who are over-sensitive to Dopamine, so too much external stimulation overdoses and exhausts them. Conversely, Extroverts can’t get enough Dopamine, and they require Adrenaline for their brains to create it. Extroverts also have a shorter pathway and less blood-flow to the brain. The messages of an Extrovert’s nervous system mostly bypass the Broca’s area in the frontal lobe, which is where a large portion of contemplation takes place.
Unfortunately, according to the book, only about 25% of people are Introverts. There are even fewer that are as extreme as I am. This leads to a lot of misunderstandings, since society doesn’t have very much experience with my people. (I love being able to say that.)
H/T to Joey deVilla for the link.