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. 2019 Nov 27;8:e48526. doi: 10.7554/eLife.48526

Figure 3. Domain-general (CPP) and effector-selective (Mu/Beta 10–30 Hz).

Decision Signals Separated by Foreperiod (FP) in the Contrast Discrimination Task. (A) Topography of the ERP signal measured prior to response (−150 ms to −50 ms) showing a positive going centroparietal component maximal over Pz. (B) Stimulus-aligned CPP separated by foreperiod duration, plotted relative to the onset of the overlaid gratings stimulus. Vertical line markers at 800/1200/1600 ms indicate the times of the contrast change across the three levels of foreperiod duration. (C) Response-aligned CPP separated by foreperiod duration. The vertical line marker at 0 ms denotes the time of response. (D) CPP amplitude measured at contrast change (−50 ms to 50 ms) and (E) at response (−150 ms to −50 ms) plotted as a function of RT separately for each foreperiod. (F) Pre-evidence CPP build-up rate (−250 ms to 50 ms) and (G) pre-response CPP build-up rate (−500 ms to −200 ms), plotted as a function of RT separately for each foreperiod. (H) Topography of lateralised Mu/Beta band (10–30 Hz) activity measured prior to response (−150 ms to −50 ms) calculated separately for each hemisphere by subtracting ipsilateral from contralateral hand responses (LH = left hand; RH = right hand).The topography shows stronger lateralisation over each hemisphere when preparing a contralateral response. (I) Stimulus-aligned contralateral and ipsilateral Mu/Beta waveforms, separated by foreperiod duration, plotted relative to the onset of the overlaid gratings. Vertical line markers at 800/1200/1600 ms denote the times of the contrast change across the three levels of foreperiod duration. Insert: stimulus-aligned Mu/Beta lateralisation (contralateral-ipsilateral) traces. (J) Response-aligned contralateral and ipsilateral Mu/Beta waveforms, separated by foreperiod duration with a vertical line marker at 0 ms denoting the time of response. Insert: response-aligned Mu/Beta lateralisation (contralateral-ipsilateral) traces. (K) Mu/beta lateralisation at contrast change (−50 to 50 ms) and (L) response (−150 ms to −50 ms), plotted as a function of RT separately for each foreperiod. (M) Pre-evidence Mu/Beta lateralisation slope (−250 ms to 50 ms) and (N) pre-response Mu/Beta lateralisation slope (−500 ms to −200 ms) plotted as a function of RT separately for each foreperiod.

Figure 3.

Figure 3—figure supplement 1. Pre-evidence stimulus-aligned CPP waveforms on long (1600ms).

Figure 3—figure supplement 1.

Foreperiod trials as a function of training session.
Figure 3—figure supplement 2. Pre-evidence cpp amplitude on long foreperiod (1600ms).

Figure 3—figure supplement 2.

Trials as a function of rt separately for left versus right responses (A) and correct versus error responses (B).
Figure 3—figure supplement 3. Contralateral and ipsilateral motor preparation as a function of pre-evidence CPP amplitude bin (large versus small based on median split).

Figure 3—figure supplement 3.

Figure 3—figure supplement 4. Bilateral Occipital ERP aligned to Contrast Change.

Figure 3—figure supplement 4.

(A) Topography of the ERP signal measured 200–300 ms post-contrast change. (B) ERP waveform over bilateral occipital cortex aligned to the contrast change with waveforms separated according to foreperiod duration.