When a person snores, the muscles in their pharynx are relaxed and the soft tissues tend to obstruct the upper airways; snoring becomes more and more intense as the airway contracts.
Apnoea occurs when the walls of the pharynx fully collapse and block the airflow.
The sufferer needs to awaken, so that the muscles can contract to enable airflow and respiration can restart.
This disorder is quite frequent, and affects more men than women.
Children can also be affected, particularly if they have large tonsils.
People who have a large uvula, a large tongue, a small chin, a receding chin, etc. are more likely to suffer from snoring and sleep apnoea.
Obesity, high blood pressure and snoring are also risk factors.
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