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. 2022 Oct 19;43(3):419–432. doi: 10.1177/0271678X221133972

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© The Author(s) 2022

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Figure 1. — Breathing protocol. a) For 1 participant (subj08) the RespirAct™ measured breathing traces are shown for PetCO₂ (top panel) and PetO₂ (bottom panel). The dashed lines depict the hypercapnic conditions (+5 mmHg & +10 mmHg PetCO₂), and the hyperoxic condition (+350 mmHg PetO₂). For 7 participants the experiment was repeated with the +5 mmHg and +10 mmHg PetCO₂ hypercapnic conditions replaced by +3 mmHg and +8 mmHg PetCO₂, respectively. b) functional timeseries (subj08) of 100 best voxels on the basis of t-statistics from GE BOLD (top panel) and 50 best voxels from SE BOLD (bottom panel). This particular set of voxels is selected for display purposes only, while the analysis was performed on the selection of statistically significant voxels (see also Statistical analysis). The mean timeseries is depicted by the thick red line.