title: Movement related brain potentials accompanying a non-productive voluntary action in humans.
abstract: This study assessed the effects of training and ability to execute a voluntary movement upon movement-related brain potentials (MRBPs). A self-paced thumb flexion initiated a sequence of autotriggered electrical stimuli over the median nerve that caused a twitch opposing the intended thumb extension. The MRBPs had earlier onsets during the first runs of skill acquisition than during later training sessions; they occurred earlier when they preceded a stimulus train than when they preceded a single stimulus; the onset was earlier over the vertex than over the premotor area. MRBP duration was longer during train stimulation when a voluntary effort had to be maintained against tetanic contraction. MRBP amplitude did not reflect task requirements under these experimental conditions.
authors.affiliation: Motor Control Section, Institute of Physiology, Bulgarian Academy of Sciences, Sofia.
authors.forename: B
authors.initials: B
authors.lastname: Dimitrov
authors.forename: M
authors.initials: M
authors.lastname: Ioffe
authors.forename: G N
authors.initials: GN
authors.lastname: Gantchev
authors.forename: A
authors.initials: A
authors.lastname: Vankov
authors.forename: T
authors.initials: T
authors.lastname: Gavrilenko
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D004558:Electric Stimulation; D004569:Electroencephalography; D004576:Electromyography; D005542:Forearm / Q000294:innervation; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000502:physiology; D008875:Middle Aged; D009043:Motor Activity; D009068:Movement; D009132:Muscles / Q000294:innervation