The point of no return in vetoing self-initiated movements

Author:

Schultze-Kraft Matthias,Birman Daniel,Rusconi Marco,Allefeld Carsten,Görgen Kai,Dähne Sven,Blankertz Benjamin,Haynes John-Dylan

Abstract

In humans, spontaneous movements are often preceded by early brain signals. One such signal is the readiness potential (RP) that gradually arises within the last second preceding a movement. An important question is whether people are able to cancel movements after the elicitation of such RPs, and if so until which point in time. Here, subjects played a game where they tried to press a button to earn points in a challenge with a brain–computer interface (BCI) that had been trained to detect their RPs in real time and to emit stop signals. Our data suggest that subjects can still veto a movement even after the onset of the RP. Cancellation of movements was possible if stop signals occurred earlier than 200 ms before movement onset, thus constituting a point of no return.

Publisher

Proceedings of the National Academy of Sciences

Subject

Multidisciplinary

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