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Only high sleep loss produces SON changes that are significantly different from disk controls. (A) SON changes in moderate sleep loss (MSL) rats. (B) SON changes in high sleep loss (HSL) rats. All HSL rat groups show significant differences from each other (see text), which is represented by *. Bars represent mean±S.E.M. Abbreviations: HCC, home caged controls; CRAT, disk controls; DRAT, sleep deprived rats.
