Which of the following parameters is not typically monitored with a polysomnogram?

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In a laboratory sleep study, several physiologic signals are recorded to determine whether airway closure occurs during sleep and to what extent the closure disturbs sleep continuity and cardiopulmonary function. An electroencephalogram (EEG), electrooculogram (EOG), and chin electromyogram (EMG) are obtained for assessment of sleep stage and documentation of sleep disruption due to sleep-related breathing disturbance. Airflow (measured at nose and mouth), ventilatory effort (using inductive plethysmography or piezo belts), cardiac rhythm (with a modified lead II electrocardiogram), and oxygen saturation (measured with pulse oximetry) are included in the standard testing montage.

Which of the Following Parameters Is Not Typically Monitored with a Polysomnogram