Fig. 4
From: Transient intracranial pressure elevations (B waves) are associated with sleep apnea
Patient with IIH transitioning from NREM to REM sleep. ICP elevations with sleep apnea start when transitioning from NREM to REM. More activity was observed in abdominal RIP than in thoracic RIP. ICP is shown in blue, with red and purple indicating the duration of apneas and respiratory disturbances. Flow: nasal cannula registering flow changes (arbitrary units). RIP, respiratory inductance plethysmography; thorax and abdomen movements (arbitrary units). SaO2 (%), oxyhemoglobin saturation measured on the finger. Heart rate, beats/min. Hypnogram with awake and sleep stages