Table 2.

Effects of 66 h of stress (St) on memory impairment induced by total sleep deprivation (TSD) in mice tested in the passive avoidance task (PAT)

Groups	PAT performance
	Training session	Test session
CTRL-CTRL	30.71 ± 5.40	218.50 ± 29.49
St+TSD-St+TSD	47.86 ± 6.26	117.50 ± 28.92*

Mice were subjected to 66 h of stress (24 h at high population, 24 h in a soiled cage, and 18 h in a cage tilt 45°) prior to 6 h of TSD immediately before the training and test sessions of PAT. Results are presented as mean ± SE latency (s) to enter the dark chamber in the training and test sessions.

^*P < 0.05 compared to CTRL-CTRL group (t-test for independent samples).