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. 2017 Sep 15;11:462. doi: 10.3389/fnhum.2017.00462

Figure 7.

Figure 7

Example (Subject 2) of the average HbO and HbR signals of a selected channel on left hemisphere before (A,C) and after (B,D) the PCA denoising. The “0” denotes the onset of the stimuli. LH: Left Hand (blue); RH: Right Hand (red).