Fig. 2.
Group (± SD) averaged muscle sympathetic nerve activity (MSNA) data, expressed as burst incidence (A), bursts per 100 cardiac cycles (B), and total activity (C), during normothermia (first data point) and at mid (second data point) and end (last data point) of heat stress. Regardless of how it is expressed, MSNA continues to increase throughout heat stress with no evidence of a plateau following the mid-level of heating. Delta Tc: Increase in core temperature measured from telemetry pill in the intestines. *P < 0.05 vs. normothermia, #P < 0.05 vs. mid heat stress (n = 8).