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Hi, this is Dr. Mahadev of Stanford school of Medicine

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I'm here with my good friend - Salman Khan

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We're following up to our ealier discussions about

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Cervical spine injuries or neck injuries

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and we're going to talk about some of the things you might do

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to manage a patient who might have a circular spine injury

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in the case that you had to do something in basic;

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like manage their airway.

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Sal: Right. When we say "manage their airway" they may have something stuck

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In their airway or blocking the airway

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Dr. Mahadev: Usually the tongue falls back and blocks the airway

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but you're right - if the airway's block, you can't get air to your lungs

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And if you can't get air to your lungs, you die.

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Sal: Right. And you said usually, your tongue falls back.

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What is that?

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Dr. Mahadev: When you're unconcious, the muscles that control your tongue

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relax, because when you're unconcious, your tongue falls back