quiet-the-power-of-introverts-in-a-world-that-cant-stop-talking-susan-cain

Nettle in his illuminating book on personality,
“in response to the pursuit or
capture of some resource that is valued.
Excitement builds towards the anticipated
capture of that resource. Joy follows
its capture.” Extroverts, in other
words, often find themselves in an emotional
state we might call “buzz”—a
rush of energized, enthusiastic feelings.
This is a sensation we all know and
like, but not necessarily to the same degree
or with the same frequency: extroverts
seem to get an extra buzz from
the pursuit and attainment of their
goals.
The basis of buzz appears to be a
high degree of activity in a network of
structures in the brain—often called the
“reward system”—including the orbitofrontal
cortex, the nucleus accumbens,
and the amygdala. The job of the reward
system is to get us excited about
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