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. 2013 Nov 12;7:736. doi: 10.3389/fnhum.2013.00736

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Copyright © 2013 van Campen, Neubert, van den Wildenberg, Ridderinkhof and Mars.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Experimental setup. (A) TMS setup and task display. Participants were seated in front of the computer display and responded by pressing the space bar with the right index finger. The test coil was placed over the left M1 and the conditioning coil was placed over rIFC. EMG was recorded continuously from the right hand FDI muscle. (B) TMS intervals. A fixation cross appeared on the screen for 500–750 ms. On TMS trials, a pulse of TMS over the motor cortex was applied on one of three SOAs, either 75, 125, or 175 ms. On half the TMS trials, this pulse was preceded by a pulse over rIFC 8 ms earlier.