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. 2013 Jan 21;10:4. doi: 10.1186/1743-0003-10-4

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Copyright © 2013 Zimmermann et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Representative observation signals. A rest (white background) and a pinching (gray background) test trial are shown. The red vertical line at t=0 represents the stimulus onset when the subject started pinching isometrically, T_Δ is the shift of 5 seconds that was applied for the extraction of observations. O_M1, O_PMv : fNIRS observations of data from M1 and PMv, respectively. O_BR, O_HR : observations of breathing and heart rate, respectively. O_SCR : observation of skin conductance response. O_BP : observation of blood pressure signal. Note that all observations are unit-less due to the normalization steps in the pre-processing.