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Polysomnographic fragment from a woman patient included in the study. The arrows mark the hyperventilation after clear hypoventilation longer than 10 s. (hypopnea) without oxygen desaturation criterion. With visible neurological channels, both episodes coincide with cortical arousals. Sum, sum of bands; Flow, nasal pressure; Thorax, thoracic band; Abd, abdominal band; SaO2, oxygen saturation.
