Figure 1.

Schematic drawings of the adult rat brain in sagittal (left) and coronal (right) views illustrating the anatomical locations of (a) the preBötzinger complex (preBötC) region, an intermediate reticular formation region (IRF), and region of the nucleus tractus solitarius (NTS, and (b) the retrotrapezoid nucleus (RTN, gray color) in relation to motor nuclei. Other abbreviations: NAsc, semi‐compact division of nucleus ambiguus; XII, hypoglossal nucleus; py, pyramids; FN, facial motor nucleus