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BCI; agency; visual evoked potentials; mu rhythm; brain-machine interfaces; motor imagery; embodiment; body ownership; virtual reality; motor action; motor activity; sense of agency
Abstract:
Agency is the attribution of an action to the self and is a prerequisite for experiencing responsibility over its consequences. Here we investigated agency and responsibility by studying the control of movements of an embodied avatar, via brain computer interface (BCI) technology, in immersive virtual reality. After induction of virtual body ownership by visuomotor correlations, healthy participants performed a motor taskwith their virtual body. We compared the passive observationof the subject’s ‘own’virtual arm performing All rights reserved. No reuse allowed without permission. (which was not peer-reviewed) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.The copyright holder for this preprint. http://dx.doi.org/10.1101/735548doi: bioRxiv preprint first posted online Aug. 15, 2019;
the task with (1) the control of the movement through activation of sensorimotor areas (motor imagery) and (2) the control of the movement through activation of visual areas (steady-state visually evoked potentials). The latter two conditions were carried out using a brain–computer interface (BCI) and both shared the intention and the resulting action. We found that BCI-control of movements engenders the sense of agency, which is strongestfor sensorimotor areas activation.Furthermore, increasedactivity of sensorimotor areas, as measured using EEG,correlates with levels of agency and responsibility. We discuss the implications of these results for the neural bases of agency, but also in the context of novel therapies involving BCI and the ethicsof neurotechnology.
