title: Steady-state movement-related potentials evoked by fast repetitive movements.
abstract: We investigated steady-state movement-related cortical potentials elicited by fast repetitive movements (1/sec) with 50-channel EEG. The experimental design comprised a comparison (a) between unilateral movements of the digits and the toes and (b) between metronome-paced and self-paced initiation of the movements. A distinct biphasic pattern of electrical activity following movement onset was observed, namely a frontal negative peak at a latency of 90 ms (post-MP100) anda frontal positive peak at a latency of 310ms (post-MP300). Pacing exerted its effects mainly on the amplitude and on the latency of the post-MP300. Source analysis revealed that both peaks could be modelled by a single source. The source locations were highly reproducible across the metronome-paced and self-paced conditions, and, they followed the expected somatotopic organisation.
authors.affiliation: Humboldt University, Berlin, Germany. bkopp@rz.hu-berlin.de
authors.forename: B
authors.initials: B
authors.lastname: Kopp
authors.forename: A
authors.initials: A
authors.lastname: Kunkel
authors.forename: G
authors.initials: G
authors.lastname: Müller
authors.forename: W
authors.initials: W
authors.lastname: Mühlnickel
authors.forename: H
authors.initials: H
authors.lastname: Flor
mesh_terms: D000328:Adult; D004569:Electroencephalography; D019054:Evoked Potentials, Motor / Q000502:physiology*; D005260:Female; D005385:Fingers / Q000294:innervation / Q000502:physiology; D006801:Humans; D008297:Male; D008959:Models, Neurological; D009044:Motor Cortex / Q000502:physiology*; D009068:Movement / Q000502:physiology*; D013997:Time Factors; D014034:Toes / Q000294:innervation / Q000502:physiology