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. 2019 Feb 9;36(5):802–814. doi: 10.1089/neu.2018.5810

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Copyright 2019, Mary Ann Liebert, Inc., publishers

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FIG. 6. — Traumatic brain injury (TBI) transiently increases delta power during non-rapid eye movement sleep in C57BL/6J mice. Power in the electroencephalogram (EEG) delta frequency band (0.5–4.5 Hz) was calculated by fast Fourier transform from artifact-free, state-specific epochs during the light and dark periods. Animals with the least artifact from each group were used: C57BL/6J mice with sham surgery (n = 5); C57BL/6J mice subjected to TBI (n = 5); hypocretin knockout (HCRT KO) mice that had sham surgeries (n = 6); and HCRT KO mice with TBI (n = 6). Delta power was normalized as the percent of the total power and is plotted as mean ± standard error of the mean. * indicates a statistically significant difference (p < 0.05) between genotypes (C57BL/6J vs. HCRT KO) within the same condition, whereas # indicates a statistically significant difference (p < 0.05) between conditions (sham vs. TBI) within the same genotype.