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Emotional inteligence

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ceruleus—alerting the body for an emergency that is not

there in reality. 10

As Dr. Charles Nemeroff, a Duke University psychiatrist,

told me, "Too much CRF makes you overreact. For

example, if you're a Vietnam vet with PTSD and a car

backfires at the mall parking lot, it is the triggering of

CRF that floods you with the same feelings as in the original

trauma: you start sweating, you're scared, you

have chills and the shakes, you may have flashbacks. In

people who hypersecrete CRF, the startle response is

overactive. For example, if you sneak up behind most

people and suddenly clap your hands, you'll see a

startled jump the first time, but not by the third or

fourth repetition. But people with too much CRF don't

habituate: they'll respond as much to the fourth clap as

to the first." 11

A third set of changes occurs in the brain's opioid system,

which secretes endorphins to blunt the feeling of

pain. It also becomes hyperactive. This neural circuit

again involves the amygdala, this time in concert with a

region in the cerebral cortex. The opioids are brain

chemicals that are powerful numbing agents, like opium

and other narcotics that are chemical cousins. When experiencing

high levels of opioids ("the brain's own

morphine"), people have a heightened tolerance for

pain—an effect that has been noted by battlefield

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