title: Post-switching beta synchronization reveals concomitant sensory reafferences and active inhibition processes.
abstract: It is known that post-movement beta synchronization (PMBS) is involved both in active inhibition and in sensory reafferences processes. The aim of this study was examine the temporal and spatial dynamics of the PMBS involved during multi-limb coordination task. We investigated post-switching beta synchronization (assigned PMBS) using time-frequency and source estimations analyzes. Participants (n=17) initiated an auditory-paced bimanual tapping. After a 1,500 ms preparatory period, an imperative stimulus required to either selectively stop the left while maintaining the right unimanual tapping (Switch condition: SWIT) or to continue the bimanual tapping (Continue condition: CONT). PMBS significantly increased in SWIT compared to CONT with maximal difference within right central region in broad-band 14-30 Hz and within left central region in restricted-band 22-26 Hz. Source estimations localized these effects within right pre-frontal cortex and left parietal cortex, respectively. A negative correlation showed that participants with a low percentage of errors in SWIT had a large PMBS amplitude within right parietal and frontal cortices. This study shows for the first time simultaneous PMBS with distinct functions in different brain regions and frequency ranges. The left parietal PMBS restricted to 22-26 Hz could reflect the sensory reafferences of the right hand tapping disrupted by the switching. In contrast, the right pre-frontal PMBS in a broad-band 14-30 Hz is likely reflecting the active inhibition of the left hand stopped. Finally, correlations between behavioral performance and the magnitude of the PMBS suggest that beta oscillations can be viewed as a marker of successful active inhibition.
authors: Research Group of Institute of Sport Sciences University of Lausanne (GRISSUL), University of Lausanne, Lausanne, Switzerland. Electronic address: etienne.sallard@gmail.com.
authors: Etienne
authors: E
authors: Sallard
authors: PRISSMH-LAPMA, University of Toulouse3, Toulouse, France.
authors: Jessica
authors: J
authors: Tallet
authors: Institute of Neuroscience and Psychology, University of Glasgow, Glasgow, United-Kingdom.
authors: Gregor
authors: G
authors: Thut
authors: INSERM U1039, Faculty of Medicine, La Tronche, France; Clinical Neurophysiology and Neuroimaging Unit, Division of Neuropsychiatry, Department of Psychiatry, University Hospitals of Geneva, Geneva, Switzerland.
authors: Marie-Pierre
authors: MP
authors: Deiber
authors: Research Group of Institute of Sport Sciences University of Lausanne (GRISSUL), University of Lausanne, Lausanne, Switzerland.
authors: Jérôme
authors: J
authors: Barral
mesh_terms: D000328:Adult; D001611:Beta Rhythm / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods; D003344:Cortical Synchronization / Q000502:physiology*; D004569:Electroencephalography; D005260:Female; D005625:Frontal Lobe / Q000502:physiology; D007839:Functional Laterality / Q000502:physiology*; D006225:Hand / Q000502:physiology; D006801:Humans; D007266:Inhibition, Psychological; D008297:Male; D009068:Movement / Q000502:physiology*; D010296:Parietal Lobe / Q000502:physiology; D013997:Time Factors
keywords: Electroencephalography; Inhibitory control; Source estimations; Time-frequency analysis