Sleep apnea is usually caused by a blockage or collapse of the airway during sleep, leading to interruptions in breathing. This condition, known as obstructive sleep apnea (OSA), occurs when the muscles in the throat relax too much, blocking airflow. Contributing factors include:
Obesity: Excess weight, especially around the neck, can pressure the airways.
Anatomical factors: enlarged tonsils, adenoids, or naturally narrow airways may increase the risk.
Elderly: muscle tone weakens with age, increasing the risk of airway collapse.
Tobacco, alcohol, and sedatives: These substances can relax the muscles of the throat and worsen the situation.
Another form, central sleep apnea (CSA), occurs when the brain fails to send appropriate signals to the muscles that control breathing, often related to medical problems such as heart disease or stroke.
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