Figure 5.
Comparison of the tracheal pressure induced from the PAG (top) and the NRA (bottom) after DLH microinjections into the respective regions in the same cat. The volume of microinjection was the same for both the PAG and the NRA. Midbrain PAG schematic is based on Berman (1968). dm, Dorsomedial column; dl, dorsolateral column; lat, lateral column; vlat, ventrolateral column.