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. 2021 Mar 12;15:653487. doi: 10.3389/fncel.2021.653487

Figure 2.

Figure 2

Illustration of fNIRS testing. (A) fNIRS testing procedure. There are two states of fNIRS testing, which are the 60s resting state and 270s force tracking task. Force tracking task consists of three trials, with each trial followed by 30s rest. (B) Force tracking task paradigm. Each block of force tracking task includes force production phase, force maintenance phase and force release phase, with 4s rest break between two adjacent blocks.