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rTMS combined with motor training changed the inter-hemispheric lateralization.

Jing-Na Jin1, Xin Wang1, Ying Li1

  • 1Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, 300192, China.

Experimental Brain Research
|August 23, 2019
PubMed
Summary
This summary is machine-generated.

Repetitive transcranial magnetic stimulation combined with motor training (rTMS-MT) enhances motor function and modulates brain activity. This study reveals rTMS-MT alters inter-hemispheric lateralization, a key mechanism for motor improvement.

Keywords:
Corticospinal tract excitationElectroencephalographyLateralizationMotor trainingRepetitive transcranial magnetic stimulation

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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Motor Control

Background:

  • Repetitive transcranial magnetic stimulation combined with motor training (rTMS-MT) is a promising intervention for motor function enhancement.
  • The impact of rTMS-MT on inter-hemispheric brain lateralization remains largely unexplored.

Purpose of the Study:

  • To investigate the effects of rTMS-MT on inter-hemispheric lateralization in healthy volunteers.
  • To determine if changes in brain lateralization correlate with motor function improvements.

Main Methods:

  • Nineteen healthy volunteers underwent 2 weeks of either rTMS-MT or motor training (MT) targeting the nondominant hand.
  • Hand dexterity was assessed using the Nine-Hole Peg Test.
  • Inter-hemispheric lateralization was evaluated using resting motor threshold (RMT), motor evoked potentials (MEP), and resting-state electroencephalography (EEG).

Main Results:

  • Both rTMS-MT and MT improved nondominant hand dexterity and MEP amplitude.
  • rTMS-MT significantly altered the lateralization of power spectral density and information transmission efficiency, particularly between central cortices.
  • MT alone induced changes in power spectral density lateralization but not information transmission efficiency.

Conclusions:

  • rTMS-MT effectively modulates inter-hemispheric brain lateralization.
  • Altered inter-hemispheric lateralization is a potential neural mechanism underlying rTMS-MT-induced motor function enhancement.
  • These findings offer insights into the brain mechanisms of rTMS-MT for motor rehabilitation.