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. 2014 Dec 9;4:7376. doi: 10.1038/srep07376

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The HRF changed the phase but not the frequency (A). The signals on task conditions were in negative correlation before and after HRF deconvolution (B). The signals were extracted from the left sensorimotor area as the average of all subjects and normalized by z-transformation. BD: Before HRF Deconvolution; AD: After HRF Deconvolution.