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loss of consciousness (unconsciousness)

when a person experiences a loss of consciousness, he or she is neither awake nor aware of the external environment. loss of consciousness often is described as being "knocked out."

attempts to arouse an unconscious person to an alert province may not be successful. the person may not respond at all or may respond with moans or non-purposeful movements.

a loss of consciousness for longer than 60 seconds needs to be evaluated by a doctor.

any loss of consciousness after a head injury, even if only for a short time, requires immediate evaluation by a doctor.

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this information does not replace the advice of a doctor. healthwise, incorporated, disclaims any warranty or liability for your use of this information. your use of this information means that you agree to the terms of use and privacy policy. to learn more about healthwise, visit healthwise.org. © 1995-2022 healthwise, incorporated. healthwise, healthwise for every health decision, and the healthwise logo are trademarks of healthwise, incorporated.

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