Differential effects of primary motor cortex and cerebellar transcranial direct current stimulation on motor learning in healthy individuals: A randomized double-blind sham-controlled study

经颅直流电刺激 运动学习 初级运动皮层 心理学 运动皮层 刺激 小脑 听力学 物理医学与康复 神经科学 医学
作者
Fatemeh Ehsani,A.H.a Bakhtiary,Shapour Jaberzadeh,Ailin Talimkhani,Abdolhamid Hajihasani
出处
期刊:Neuroscience Research [Elsevier]
卷期号:112: 10-19 被引量:59
标识
DOI:10.1016/j.neures.2016.06.003
摘要

The purpose of study was to compare the effect of primary motor cortex (M1) and cerebellar anodal transcranial direct current stimulation (a-tDCS) on online and offline motor learning in healthy individuals. Fifty-nine healthy volunteers were randomly divided into three groups (n = 20 in two experimental groups and n = 19 in sham-control group). One experimental group received M1a-tDCSand another received cerebellar a-tDCS. The main outcome measure were response time (RT) and number of errors during serial response time test (SRTT) which were assessed prior, 35 min and 48 h after the interventions. Reduction of response time (RT) and error numbers at last block of the test compared to the first block was considered online learning. Comparison of assessments during retention tests was considered as short-term and long-term offline learning. Online RT reduction was not different among groups (P > 0.05), while online error reduction was significantly greater in cerebellar a-tDCS than sham-control group (P < 0.017). Moreover, a-tDCS on both M1 and cerebellar regions produced more long-term offline learning as compared to sham tDCS (P < 0.01), while short-term offline RT reduction was significantly greater in M1a-tDCS than sham-control group (P < 0.05). The findings indicated that although cerebellar a-tDCS enhances online learning and M1a-tDCS has more effect on short-term offline learning, both M1 and cerebellar a-tDCS can be used as a boosting technique for improvement of offline motor learning in healthy individuals.
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