Fig. 6.

Histograms showing the mean arterial pressure (MAP) (A) and heart rate (HR) (B) of normal untreated, control for total sleep-deprived (TSC) and total sleep-deprived (TSD) rats. Data are expressed as the averaged value detected from both the day and night groups. In normal untreated rats, MAP and HR were 120 ± 4.7 mmHg and 402 ± 6 beats min^–1. In the TSC group, MAP and HR were 118 ± 3.9 mmHg and 407 ± 2 beats min^–1. In rats treated with TSD for 5 days, however, both MAP and HR were considerably elevated to 157 ± 7.8 mmHg and 463 ± 3 beats min^–1, respectively, indicating a deficiency in cardiovascular regulation. *P<0.05 as compared with normal untreated values.