Fig. 6.
Analysis of high-amplitude bursts observed after transections at level 4. A: schematic illustration of the transection level. B: Poincaré plots of Ttot for high-amplitude phrenic nerve activity (PNA) of preparation a priori transected at level 4. C: bar diagram illustrating the synchronicity of burst activity across the 3 recorded motor outputs. Amb, nucleus ambiguus; BC, Bötzinger complex; c-rVRG, caudal and rostral ventral respiratory group; DRG, dorsal respiratory group; LRt, lateral reticular nucleus; NRA, nucleus retroambiguus; NTS, nucleus tractus solitarii; RTN/pFRG, retrotrapezoid nucleus/parafacial respiratory group.