Figure 3. Group-average transfer functions from BP to RBF in 8 baroreceptor-intact rats (gray traces) and 8 SAD rats (black traces). The frequency scale was limited to 1 Hz to emphasize the frequency band at which autoregulatory processes are expected to operate. Standard error lines have been omitted for legibility. The horizontal dotted line in the gain spectra shows the limit above which fractional variations of RBF exceed those of BP.