title: The N-40: an electrophysiological marker of response selection.
abstract: A frontocentral electrophysiological wave occurring before the response, the N-40, has been reported in response choice situations compared to no-choice situations. This was interpreted as reflecting response selection. The gradual sensitivity of the N-40 to the demands put on response choice was tested by manipulating stimulus-response (S-R) congruence so as to influence response selection processes. After Laplacian transformation, an N-40 clearly emerged and was larger for incongruent (more demanding) than for congruent (less demanding) S-R associations. The N-40, which possibly reflects SMA activation, thus provides information about the implementation of response selection in the brain.
authors: Institut de Recherche Biomédicale des Armées, Toulon, France. laurence.carbonnell@hotmail.fr
authors: Laurence
authors: L
authors: Carbonnell
authors: Céline
authors: C
authors: Ramdani
authors: Cédric
authors: C
authors: Meckler
authors: Boris
authors: B
authors: Burle
authors: Thierry
authors: T
authors: Hasbroucq
authors: Franck
authors: F
authors: Vidal
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D002755:Choice Behavior / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology; D011930:Reaction Time / Q000502:physiology*