On-line executive control: an electromyographic study.
In a choice reaction time (RT) task, electromyographic (EMG) recordings allowed us to fractionate RT into two subcomponents, namely premotor time and motor time. This has been done for correct trials and errors. The analysis of the EMG burst and motor time (between EMG onset and overt response) showed that the EMG burst amplitude was reduced and the motor time was longer for errors than for correct responses. In the same way as posterror slowing on the RT was interpreted as revealing between-trials changes in executive control, the present data provide direct evidence for an on-line, within-trial, executive control.
Allain
Sonia
S
Institut de Médecine Navale du Service de Santé des Armées, Toulon, France. allain@lnf.cnrs-mrs.fr
Carbonnell
Laurence
L
Burle
Boris
B
Hasbroucq
Thierry
T
Vidal
Franck
F
D000328:Adult; D002755:Choice Behavior / Q000502:physiology*; D003220:Conflict, Psychological; D004569:Electroencephalography; D004576:Electromyography; D019054:Evoked Potentials, Motor / Q000502:physiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009044:Motor Cortex / Q000502:physiology*; D018482:Muscle, Skeletal / Q000294:innervation*; D009433:Neural Inhibition / Q000502:physiology; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted