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

potential goodies; fMRI experiments
have shown that the system is activated
by any number of possible delights,
from anticipation of a squirt of Kool-
Aid on the tongue, to money, to pictures
of attractive people.
The neurons that transmit information
in the reward network operate in
part through a neurotransmitter—a
chemical that carries information
between brain cells—called dopamine.
Dopamine is the “reward chemical” released
in response to anticipated pleasures.
The more responsive your brain is
to dopamine, or the higher the level of
dopamine you have available to release,
some scientists believe, the more
likely you are to go after rewards like
sex, chocolate, money, and status.
Stimulating mid-brain dopamine activity
in mice gets them to run around excitedly
in an empty cage until they
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