FUNDAMENTALS
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Fight or Flight

Do you get mad when the umpire calls you out on a close throw to first base?

Do you get angry when someone cuts in front of you in line?

Do you tremble all over after a near-miss accident?

What makes your body shake and your face turn red when you are angry or in danger?

Sammy Sosa
Courtesy The Holland Sentinal

Human Nervous System
Human Nervous System
Graphic Courtesy National Institutes of Health

Some of your organs--heart, stomach, intestines, and some of your glands--are controlled by the part of our nervous system that works automatically. It is called the autonomic nervous system (ANS).

The ANS has two parts, the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The SNS speeds things up. The PNS slows things down.

Most of the time we do not notice the ANS. It does routine things like controlling your heart and breathing rates, turning on and off your digestion, and keeping your temperature constant.


But when you are in danger your ANS has a special role. The SNS alerts the adrenal glands in your kidneys to release special chemicals* into the blood.

Human Adrenal Glands
Human Adrenal Glands
Courtesy National Institutes of Health

These chemicals prepare your body to fight or to run away. They make your breathing deeper and faster. They turn off the blood flow to your stomach and send it to the muscles in your arms and legs. They make the pupils of your eyes grow larger (dilate).

When you are in danger your sight sharpens and you become more aware of everything around you. Your sense of pain goes down. Your immune system gets ready for action. You scan the area, "looking for the enemy."

You are getting ready for fight or flight--to stand your ground or to run away.

Sometimes when you get angry you would be better off if you could calm down and let it pass.

Some people are prone to anxiety and panic attacks. Their PNS does not seem to work properly. It fails to return the body to its normal state. The sufferer stays keyed up simply because there are high levels of free-floating SNS chemicals in the body that have not burned off yet. For some people these effects last for hours, for other people it can last for days.

 

*SNS chemicals include adrenaline, noradrenaline, and cortisol.


© 2004 Event-Based Science Institute