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Power spectra (n=12) of (A) mean arterial blood pressure (MABP), (B) cerebral blood flow velocity (CBFV), (C) cerebral tissue oxygenation index (CTOI), (D) global mean blood oxygen level-dependent (BOLD) signal, (E) cerebrospinal fluid (CSF) mean signal, and (F) white-matter (WM) mean signal. Solid line: mean. Dotted lines: standard error. AU: arbitrary unit.
