Studio finanziato dalla Brain Research Foundation Verona.
Articolo pubblicato online il 30 luglio 2020: https://link.springer.com/article/10.1007/s12311-020-01172-0
© 2020 The Author(s).
Autori
Mehran Emadi Andani, Bernardo Villa-Sánchez, Federico Raneri, Silvia Dametto, Michele Tinazzi, Mirta Fiorio.
Abstract
Balance control is essential to maintain a stable body position and to prevent falls. The aim of this study was to determine whether balance control could be improved by using cerebellar transcranial direct current stimulation (tDCS) and visual feedback in a combined approach. A total of 90 healthy volunteers were randomly assigned to six groups defined by the delivery of tDCS (cathodal or anodal or sham) and the provision or not of visual feedback on balance during the acquisition phase. tDCS was delivered over the cerebellar hemisphere ipsilateral to the dominant leg for 20 min at 2 mA during a unipedal stance task. Body sway (i.e., ankle angle and hip position) was measured as an overall maximal unit in anteroposterior and mediolateral direction, together with participant rating of perception of stability, before (baseline), during (acquisition), and after (final) the intervention. We found a reduction in body sway during the acquisition session when visual feedback alone was provided. When the visual feedback was removed (final session), however, body sway increased above baseline. Differently, the reduction in overall maximal body sway was maintained during the final session when the delivery of cathodal tDCS and visual feedback was combined. These findings suggest that cathodal tDCS may support the short-term maintenance of the positive effects of visual feedback on balance and provide the basis for a new approach to optimize balance control, with potential translational implications for the elderly and patients with impaired posture control.
Responsabile: Mirta Fiorio – Università degli Studi di Verona
mirta.fiorio@univr.it
Articolo open access con licenza Creative Commons.