<unk>  <unk>  or<unk>  syndrome <unk> S) is a sleep-related disorder in which the effort to breathe is diminished or absent, typically for 10 to 30 seconds either intermittently or in cycles, and is usually associated with a reduction in blood oxygen saturation.<unk>  is usually due to an instability in the body's feedback mechanisms that control respiration.<unk>  can also be an indicator of Arnold–Chiari malformation.
Central sleep apnea
Sleep apnea
Obstructive sleep apnea
Hyperventilation syndrome
Obesity hypoventilation syndrome
Central hypoventilation syndrome
Sleep-related breathing disorder
Shift work sleep disorder