Publication details

Inferior parietal lobule involved in representation of "what" in a delayed-action Libet task

Authors

BEČEV Ondřej MAREČEK Radek LAMOŠ Martin MAJCHROWICZ Bartosz ROMAN Robert BRÁZDIL Milan

Year of publication 2021
Type Article in Periodical
Magazine / Source Consciousness and Cognition
MU Faculty or unit

Faculty of Medicine

Citation
Web https://www.sciencedirect.com/science/article/pii/S1053810021000751?via%3Dihub
Doi http://dx.doi.org/10.1016/j.concog.2021.103149
Keywords EEG; Intentional action; Action representation; Action selection; Prospective memory; Inferior parietal lobule; Libet task; Lateralized readiness potential; Delayed action
Description Intentional motor action is typically characterized by the decision about the timing, and the selection of the action variant, known as the "what" component. We compared free action selection with instructed action, where the movement type was externally cued, in order to investigate the action selection and action representation in a Libet's task. Temporal and spatial locus of these processes was examined using the combination of high-density electroencephalography, topographic analysis of variance, and source reconstruction. Instructed action, engaging representation of the response movement, was associated with distinct negativity at the parietal and centroparietal channels starting around 750 ms before the movement, which has a source particularly in the bilateral inferior parietal lobule. This suggests that in delayed-action tasks, the process of action representation in the inferior parietal lobule may play an important part in the larger parieto-frontal activity responsible for movement selection.
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