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The effects of increasing task load on rCBF/FCS ratio. (A) The rCBF/FCS map at 0-back, 1-back, 2-back, and 3-back. (B) Repeated-measures ANOVA revealed significantly modulated rCBF/FCS values by task load in the left IPL/SPL (1) and MFC (2), bilateral ACC/mPFC (3), and PCC (4). (C) Significant differences in rCBF/FCS across the four task loads in the four regions. Error bars refer to SE. **Pcorrected < 0.01.
