Electro-cortical correlates of motor inhibition: a comparison between selective and non-selective stop tasks.
In this study, we compared a selective stop task (transition from a bimanual in-phase to a unimanual index fingers' tapping), with a non-selective stop task (stopping a bimanual in-phase tapping at all), and with a switching task (transition from in-phase to anti-phase bimanual tapping). The aim was twofold: 1) to identify the electro-cortical correlates of selective and non-selective inhibition processes and 2) to investigate which type of inhibition - selective or not - is required when switching between two bimanual motor patterns. The results revealed that all tasks led to enhanced activation (alpha power) of the left sensorimotor and posterior regions which seems to reflect an overall effort to stop the preferred bimanual in-phase tendency. Each task implied specific functional connectivity reorganizations (beta coherence) between cerebral motor areas, probably reflecting engagement in a new unimanual or bimanual movement.
Tallet
Jessica
J
Laboratoire du Développement et des Apprentissages Moteurs, Faculté de Psychologie et des Sciences de l'Education, Université de Genève, Switzerland. tallet@cict.fr
Barral
Jérôme
J
Hauert
Claude-Alain
CA
D000328:Adult; D001931:Brain Mapping; D004569:Electroencephalography; D019054:Evoked Potentials, Motor / Q000502:physiology; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D009044:Motor Cortex / Q000502:physiology*; D009433:Neural Inhibition / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*