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

on the dopamine-driven reward system and
its role in delivering life’s goodies. But
there’s a mirror-image brain network, often
called the loss avoidance system, whose job
is to call our attention to risk. If the reward
network chases shiny fruit, the loss avoidance
system worries about bad apples.
The loss avoidance system, like the reward
network, is a double-edged sword. It
can make people anxious, unpleasantly
anxious, so anxious that they sit out bull
markets while everyone else gets rich. But
it also causes them to take fewer stupid
risks. This system is mediated in part by a
neurotransmitter called serotonin—and
when people are given drugs like Prozac
(known as selective serotonin reuptake inhibitors)
that affect the loss avoidance system,
they become more blasé about danger.
They also become more gregarious. These
features coincide uncannily, points out the
neurofinance expert Dr. Richard Peterson,
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