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No change of contextual fear expression in shock-exposed rats by SD. (A) Schematic timeline of experiment 2 procedures. Rats were deprived of sleep (SD) or not deprived of sleep (None) for 48 h after fear conditioning, and then, contextual fear expression were carried out. ED, experimental day. (B) Freezing behaviors duration in each session between none and SD group (two-way ANOVA).
