Figure 6. Comparison of the effects of dialysis of 8-OH-DPAT into the rostral medullary raphe (data taken from Taylor et al. 2005a) and the caudal medullary raphe (present study).

The schematic drawing at the top shows a parasaggittal view of the medulla with the arrows at the top to demonstrate the location of the dialysis probes in the two studies, one in the rostral MR the other in the caudal MR. The circles represent the approximate areas of drug diffusion, with the rostral arrow pointing to the overall effects on the response to 7% CO₂ (shown as ) and the caudal arrow pointing to the same for the present study. Abbreviations: DR, dorsal raphe; mR, median raphe; pR, pontine raphe; RMg, raphe magnus; RPa, raphe pallidus; and ROb, raphe obscurus.