Illustration copyright 2000 by Nucleus Communications, Inc. All rights reserved. http://www.nucleusinc.com
A normal upper airway is open without blockage during sleep.
| By | Healthwise Staff |
| Primary Medical Reviewer | William H. Blahd, Jr., MD, FACEP - Emergency Medicine |
| Specialist Medical Reviewer | David Messenger, MD |
| Last Revised | December 13, 2010 |
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