Figure 5 | Scientific Reports

Figure 5

From: Non-predictive online spatial coding in the posterior parietal cortex when aiming ahead for catching

Figure 5

Experimental set-up and paradigm. (a) Schematic side-view of the physical set-up. (b and c) Exemplary target paths used during the experiment for downward and upward target motion, respectively. Panels (b) and (c) represent the full screen at 1280 × 1024 pixels. The visible part of each path is shown as a solid red line; the occluded part is a grey dashed line. The initial and final target zones are displayed as thick horizontal red lines (not shown to participants). Note that the calibration involved pointing movements towards targets presented at the screen centre (black cross-sign) and the 8 outer positions of the initial and final target zones. Also note that the initial zone constrained target positions midway through its visible window. (d) Trial sequence. First, colour of the central fixation cross represents whether the fingertip is within (green) or outside (red) the initial finger zone. After the finger remained within the zone for 250 ms, the white fixation cross is shown for 1400 ms. Subsequently, the target appears (on TMS trials) in sync with the onset of the rTMS train (0–500 ms, 6 pulses at 10 Hz); two horizontal reference lines appear. After 38 frames (507 ms) the target disappears, but it supposed to continue to keep moving until 600 ms later (dashed circle), when the target reaches one of the reference lines, now turned red to signal the ideal moment of interception.

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