title: Cortical processing of simultaneous hand and foot movements: evidence from event-related potentials.
abstract: The motor processes involved in generating simultaneous hand and foot movements were studied by recording event-related potentials (ERPs) during reaction time tasks in which participants made hand and foot movements either alone or in combination with one another. In particular, we assessed whether the motor potentials generated during combined movements were simply superpositions of the potentials generated during the individual movements in isolation. ERPs generated during single-limb movements replicated previously observed motor potentials, and those generated during both the execution (Experiment 1) and preparation (Experiment 2) of combined movements showed some deviations from the predictions of the superposition hypothesis, suggesting the presence of neural interactions between the hand and foot movement systems during preparation and execution of these actions.
authors.affiliation: Department of Psychology, University of Otago, Dunedin, New Zealand.
authors.forename: Jeff
authors.initials: J
authors.lastname: Miller
authors.affiliation: Department of Psychology, University of Würzburg, Würzburg, Germany.
authors.forename: Natascha
authors.initials: N
authors.lastname: Gerstner
mesh_terms: D000293:Adolescent; D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials; D019054:Evoked Potentials, Motor / Q000502:physiology*; D005260:Female; D005528:Foot; D006225:Hand; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D055815:Young Adult
keywords: EEG/ERP; Hand and foot movements; Motor processes; Superposition