Single-Session Cerebellar Transcranial Direct Current Stimulation Affects Postural Control Learning and Cerebellar Brain
- PDF / 580,692 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 29 Downloads / 182 Views
ORIGINAL ARTICLE
Single-Session Cerebellar Transcranial Direct Current Stimulation Affects Postural Control Learning and Cerebellar Brain Inhibition in Healthy Individuals Natsuki Katagiri 1 & Saki Kawakami 1 & Sayuri Okuyama 1 & Tadaki Koseki 1 & Daisuke Kudo 1 & Shigehiro Namba 1 & Shigeo Tanabe 2 & Tomofumi Yamaguchi 1,3 Accepted: 20 October 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Cerebellar transcranial direct current stimulation (ctDCS) modulates cerebellar activity and postural control. However, the effects of ctDCS on postural control learning and the mechanisms associated with these effects remain unclear. To examine the effects of single-session ctDCS on postural control learning and cerebellar brain inhibition (CBI) of the primary motor cortex in healthy individuals. In this triple-blind, sham-controlled study, 36 participants were allocated randomly to one of three groups: (1) anodal ctDCS group, (2) cathodal ctDCS group, and (3) sham ctDCS group. ctDCS (2 mA) was applied to the cerebellar brain for 20 min prior to six blocks of standing postural control training (each block consisted of five trials of a 30-s tracking task). CBI and corticospinal excitability of the tibialis anterior muscle were assessed at baseline, immediately after, 1 day after, and 7 days after training. Skill acquisition following training was significantly reduced in both the anodal and cathodal ctDCS groups compared with the sham ctDCS group. Changes in performance measured 1 day after and 7 days after training did not differ among the groups. In the anodal ctDCS group, CBI significantly increased after training, whereas corticospinal excitability decreased. Anodal ctDCS-induced CBI changes were correlated with the learning formation of postural control (r = 0.55, P = 0.04). Single-session anodal and cathodal ctDCS could suppress the skill acquisition of postural control in healthy individuals. The CBI changes induced by anodal ctDCS may affect the learning process of postural control. Keywords Transcranial direct current stimulation . Cerebellar brain inhibition . Postural control . Motor learning
Introduction Transcranial direct current stimulation (tDCS) is a noninvasive brain stimulation technique that causes cortical activity changes in a polarity-specific manner [1]. Cerebellum excitability plays a significant role in standing balance [2, 3] and
* Tomofumi Yamaguchi [email protected] 1
Department of Physical Therapy, Graduate School of Health Sciences, Yamagata Prefectural University of Health Sciences, 260 Kamiyanagi, Yamagata-shi, Yamagata 990-2212, Japan
2
Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake-shi, Aichi 470-1192, Japan
3
Department of Physical Therapy, Faculty of Health Science, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan
postural control learning [4, 5]. Thus, tDCS applied over cerebral areas may have the potential to modulate standing postural contr
Data Loading...
