Central sleep apnea here pathophysiology
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Central sleep apnea occurs when inhibitory signals to the respiratory center of the brain are greater than the excitatory signals. This may occur more often during sleep when the excitatory input is often diminished. Patients develop cycles of apnea or hypopnea alternating with hyperpnea during sleep. The hyperventilatory episode causes hypocapnea which then leads to apnea when a certain threshold is reached. This cycle of hypercapnea, hyperventilation, and apnea gets repeated throughout the period of sleep.