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. Author manuscript; available in PMC: 2021 Nov 1.
Published in final edited form as: J Physiol. 2020 Jul 24;598(21):4969–4994. doi: 10.1113/JP280243

Figure 6. Model simulations of neuronal activity during normocapnia and hypercapnia.

Figure 6.

Active expiration emerges in model activity following an increase in chemosensitive drive to the late expiratory population (late-E) of the parafacial respiratory group (pFRG). The baseline model activity (Panel A) transforms to include late-expiratory bursts (Panel B) when the chemosensitive drive to late-E is increased by 33%. The transformation of the respiratory pattern during the late expiratory phase is emphasized by the orange shaded boxes. Other abbreviations – aug-E: augmenting expiratory population; post-I (GABA): GABAergic post-inspiratory population; post-I (Gly): glycinergic post-inspiratory population; early-I: early inspiratory population.