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. 2014 Apr 28;6:79. doi: 10.3389/fnagi.2014.00079

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Copyright © 2014 Wolkorte, Kamphuis and Zijdewind.

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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Overview of the raw data of a representative subject. (A) Task II, right index finger abduction force and EMG recordings of the first dorsal interosseus muscle (FDI) during maximal voluntary contractions (MVC). (B) Task III, single CRT-task. Subjects had to respond with either their index or middle finger to two stimuli with a different probability of presentation (frequent and an infrequent tone). Two top rows show the reactions to 12 blocks of CRT, with 5 short (5 s) MVCs between blocks of CRT. Force and EMG recordings are presented in row three and four. (C) Task IV, 10%-dual-task. Top two rows, show 12 blocks of CRT concurrent with right index finger abduction (force and EMG at row three and four) at 10% of cMVC, with a period of 5 s MVC after every block. (D) Task IV. 30%-dual-task. Similar to (C), but force at 30% of cMVC, the task is maintained until task failure.