Chinese Journal of Rehabilitation Theory and Practice ›› 2025, Vol. 31 ›› Issue (5): 607-612.doi: 10.3969/j.issn.1006-9771.2025.05.014

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Effect of time intervals of priming continuous theta burst stimulationon on cortical plasticity induced by intermittent theta burst stimulation

GENG Ayan1,2, WANG Qinglei1,2, SHEN Junfan1,2, ZHU Shizhe1,2, JI Panpan3, WANG Tong1,2(), GUO Chuan1,2()   

  1. 1. School of Rehabilitation Medicine, Nanjing Medical University, Nanjing, Jiangsu 210029, China
    2. The First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu 210029, China
    3. Changzhou De'an Hospital, Changzhou, Jiangsu 213004, China
  • Received:2025-02-25 Revised:2025-04-14 Published:2025-05-25 Online:2025-05-26
  • Contact: GUO Chuan, E-mail: guochuan@njmu.edu.cn; WANG Tong, E-mail: wangtong60621@163.com
  • Supported by:
    National Natural Science Foundation of China (Youth)(82302882)

Abstract:

Objective To investigate the effect of continuous theta burst stimulation-intermittent theta burst stimulation (cTBS-iTBS) priming protocols with different time intervals on the plasticity of primary motor cortex (M1).
Methods A total of 39 healthy young adults were recruited from Changzhou De'an Hospital from March to August, 2024. Participants received cTBS-iTBS priming protocols with intervals of 5 minutes, 10 minutes and 15 minutes using a randomized crossover design. Motor-evoked potential (MEP) amplitudes in M1 were recorded at baseline (before intervention) and 0 minute, 10 minutes, 20 minutes and 30 minutes after intervention.
Results The main effects of stimulation protocol (F = 19.761, P < 0.001) and measurement time (F = 10.224, P < 0.001) were significant. At each time point after intervention, the MEP amplitude was significantly higher under the 10-minute interval than under the 5-minute and 15-minute intervals (t > 3.010, P < 0.05).
Conclusion The 10-minute interval of cTBS-iTBS is more effective on M1 plasticity.

Key words: theta burst stimulation, plasticity, motor-evoked potential, Bienenstock-Cooper-Munro theory

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