 |
Portail HAL - Université de Lille |  |
Article dans une revue
Motor Preparation of Step Initiation: Error-related Cortical Oscillations
Abstract : Gait initiation can vary as a function of the available and engaged attentional resources. Conflict resolution can disrupt movement preparation and lead to ‘‘errors” in motor programming. These ‘‘errors” are physiologically useful by enabling us to adapt our motor behavior to situations with conflicting information. The objective of the present study was to analyze the patterns of cortical activation associated with motor programming errors and the corresponding error corrections. Incongruent flankers around a target arrow were used to trigger errors in anticipatory postural adjustments (APAs) prior to gait initiation; i.e. perturbed motor programming but normal execution. Thirty healthy adults performed a gait initiation task. The event-related potentials (ERPs) and event-related desynchronization (ERD) after target presentation were analyzed according to the presence or absence of an APA error. The ERP was similar in both conditions, except that the Ne and P300 peak latencies were longer for APA errors. Motor programming errors during gait initiation were characterized by longer, less intense low-beta-band ERD over the sensorimotor cortex and alpha ERS followed by stronger alpha ERD during errors. APA errors were associated with a specific alpha/beta oscillation profile over the sensorimotor cortex; these beta oscillations might be sensitive markers of non-conscious motor error and correction monitoring.
https://hal.univ-lille.fr/hal-02178934
Contributeur : Lilloa Université de Lille Connectez-vous pour contacter le contributeur
Soumis le : jeudi 26 novembre 2020 - 10:27:04
Dernière modification le : samedi 12 décembre 2020 - 17:50:48
Contributeur : Lilloa Université de Lille Connectez-vous pour contacter le contributeur
Soumis le : jeudi 26 novembre 2020 - 10:27:04
Dernière modification le : samedi 12 décembre 2020 - 17:50:48
Fichier
Motor preparation.pdf
Fichiers produits par l'(les) auteur(s)