TABLE 1.

Chronic unpredictable stress procedure.

Day	Stressors
Monday	Isolation 24 h (one rat per cage); cage tilt 45°overnight
Tuesday	Tail pinch 3 min; Crowding overnight (15 rats per cage)
Wednesday	Electric shock 3 min (0.8 mA); water deprivation 12 h
Thursday	White noise 1 h (110 dB); strobe flash 2 h
Friday	Swim stress 10°C, 5 min; shaker stress 1 h (160 rpm)
Saturday	Restraint stress 4 h; reversal of the light/dark cycle (light off 12 h and light on overnight)
Sunday	Food deprivation 12 h; wet bedding overnight