Figure 4.
Renal sympathetic nerve discharge (A; Δ renal SND, %), mean arterial pressure (B; MAP, mmHg), and heart rate (C; HR, beats per min, bpm) recorded at control (Con, 38°C) and 4-6 min following RVLM bicuculline (BIC) microinjections with Tc maintained at 38°C (RVLM BIC, 38°C) in young (open bars, n=5) and aged (closed bars, n=5) F344 rats. *RVLM BIC significantly different from control (38°C). †Young F344 rats significantly different from aged F344 rats.