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- W2912684178 abstract "BackgroundRecent studies have shown that neurophysiological outcomes of transcranial direct current stimulation (TDCS) are influenced by current flow in brain regions between the electrodes, and in particular the orientation of current flow relative to the cortical surface.ObjectiveWe asked whether the directional effects of TDCS on physiological measures in the motor system would also be observed on motor behaviours.MethodsWe applied TDCS during the practice of a ballistic movement task to test whether it affected learning or the retention of learning 48 h later. TDCS electrodes were oriented perpendicular to the central sulcus and two current orientations were used (posterior-anterior, TDCSPA; and anterior-posterior, TDCSAP). Transcranial magnetic stimulation (TMS) was used to assess whether changes in corticospinal excitability reflected any behavioural changes.ResultsDirectional TDCSAP impaired the retention of learning on the ballistic movement task compared to TDCSPA and a sham condition. Although TDCSPA had no effect on learning or retention, it blocked the typical increase in corticospinal excitability after a period of motor practice.ConclusionsOur results extend on previous reports of TDCS producing directionally specific changes in neurophysiological outcomes by showing that current direction through a cortical target also impacts upon behavioural outcomes. In addition, changes in corticospinal excitability after a period of motor practice are not causally linked to behavioural learning." @default.
- W2912684178 created "2019-02-21" @default.
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- W2912684178 date "2019-05-01" @default.
- W2912684178 modified "2023-10-17" @default.
- W2912684178 title "Direction of TDCS current flow in human sensorimotor cortex influences behavioural learning" @default.
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- W2912684178 doi "https://doi.org/10.1016/j.brs.2019.01.016" @default.
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