Figure 1. Subregions of the ventral respiratory group (VRG) identified by the cardiorespiratory response patterns to DLH injection.

This schematic diagram illustrates a sagittal section through the brainstem of a rat 1.9 mm lateral to the midline. 7, facial nucleus; 7n, facial nerve; LRt, lateral reticular nucleus; Mo 5, motor nucleus of the trigeminal nerve; NAc, nucleus ambiguus, compact part; scp, superior cerebellar peduncle; SO, superior olive.