Provides insight into reasons why airways may be blocked or constricted.
Normally the muscles in your throat help to keep the airway open. However, with aging and weight gain, those muscle fibers relax and nerve signals diminish, making it easier for the airway to collapse, particularly when lying flat on your back. Some people are more likely to have OSA because of the shape of their palate, or the size of their neck and/or tonsils. People who are overweight may also have fatty tissue built up around the airway, which can press it closed during sleep.