title: Evidence for interhemispheric motor-level transfer in a simple reaction time task: an EEG study.
abstract: Simple visuomanual reaction time tasks require interhemispheric communication when stimuli are presented in the hemifield opposite the responding hand. Although confirmed in many studies, it is still a matter of debate when, at what functional level and at what site this interhemispheric transfer takes place. To address these questions, we recorded event-related potentials (ERPs) in 12 healthy subjects performing such a task and analyzed the data using techniques based on topographic ERP map characteristics. A method which has proved useful for associating ERP map configurations of different time periods with functional states of the brain was supplemented by a source localization procedure. The results suggest that transfer occurs late in time, on a functional motor level and at frontal sites, at least for left-to-right interhemispheric direction of transfer.
authors.affiliation: Faculty of Psychology, University of Geneva, CH-1227 Carouge, Switzerland. gregor.thut@hcuge.ch
authors.forename: G
authors.initials: G
authors.lastname: Thut
authors.forename: C A
authors.initials: CA
authors.lastname: Hauert
authors.forename: S
authors.initials: S
authors.lastname: Morand
authors.forename: M
authors.initials: M
authors.lastname: Seeck
authors.forename: T
authors.initials: T
authors.lastname: Landis
authors.forename: C
authors.initials: C
authors.lastname: Michel
mesh_terms: D000328:Adult; D001931:Brain Mapping / Q000379:methods*; D004569:Electroencephalography; D019054:Evoked Potentials, Motor / Q000502:physiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology*; D012016:Reference Values