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Figure 9 | Journal of NeuroEngineering and Rehabilitation

Figure 9

From: Relationship between oxygen supply and cerebral blood flow assessed by transcranial Doppler and near – infrared spectroscopy in healthy subjects during breath – holding

Figure 9

NIRS signals and VMR pattern for subject A. Time course of the O2Hb and CO2Hb concentration signals for subject A (healthy current smoker) during BH (left panel) and bidimensional VMR pattern (right panel). The signals reveal an uncompensated increase of the CO2Hb level, that determines a VMR pattern always out of the two bisectors region. Also, the onset of VMR is delayed and the VMR pattern never reaches a plateau condition.

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