Cortical movement preparation before and after a conscious decision to move.

摘要: The idea that our conscious decisions determine actions has been challenged by a report suggesting the brain starts to prepare for movement before person concerned consciously decided move (Libet, Gleason, Wright, & Pearl, 1983). Libet et al. claimed their results show are not initiated. current article describes two experiments in which we attempted replicate al.'s comparison of participants' movement-related activity with reported times and also hand move. We looked at distribution reports over time evaluate an alternative explanation (1983) results. Although Readiness Potential was usually present all move, consistent findings Keller Heckhausen (1990) (1983), found many decision were onset Lateralized Potential, measures hand-specific preparation. latter finding is conclusion LRP always started after conclude even though related anticipation may be cortical preparation necessary happen immediately start until