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. 2013 Apr 1;36(4):471–480. doi: 10.5665/sleep.2526

Figure 4.

Figure 4

Total sleep amounts plotted in 4-h blocks (Block 1 and Block 2) and the total 8-h light period. (A) Total REM duration for handling BH, ST, and CR in the dW control group. (B) Total NREM duration for handling BH, ST, and CR in the dW group. (C) Total sleep duration for handling BH, ST, and CR in the dW group. Error bars are ± standard error of the mean. *P < 0.05; **P < 0.01; and ***P < 0.001 compared with BH. +P < 0.05 compared with ST. BH, control; CR, context reexposure; dW, distilled water; NREM, nonrapid eye movement; REM, rapid eye movement; ST, shock training.