Sleep apnea - Symptoms and causes - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/sleep-apnea/symptoms-causes/syc-20377631
WebApr 6, 2023 · The main types of sleep apnea are: Obstructive sleep apnea (OSA), which is the more common form that occurs when throat muscles relax and block the flow of air into the lungs. Central sleep apnea (CSA), which occurs when the brain doesn't send proper signals to the muscles that control breathing.
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