Figure 6.

Traces showing the effects of ionophoretically applied (1) sumatriptan and (2) CP-93 129 to the vicinity of a NTS neurone (in anaesthetized rats), that had been excited by cardiopulmonary afferent activation (induced by injecting PBG (18 μg kg⁻¹; 30 μl) into the right atrium) on blood pressure (BP), continuous rate histogram of neuronal activity (spikes bin⁻¹) and a raw recording of neuronal activity. In (2) it should be noted that the background activity is vagal evoked activity (0.5 Hz) and demonstrates the stability of the recording of the neurone over time. Cell identity between panels is confirmed by the expanded sections.