ISSN 0439-755X
CN 11-1911/B
主办:中国心理学会
   中国科学院心理研究所
出版:科学出版社

心理学报 ›› 2023, Vol. 55 ›› Issue (10): 1653-1661.doi: 10.3724/SP.J.1041.2023.01653

• 研究报告 • 上一篇    下一篇

不同形式运动锻炼老年人运动皮层突触可塑性的差异:来自TMS的研究证据

孟海江1(), 陈蕾1, 王刚1, 张剑2   

  1. 1安庆师范大学体育学院, 安徽 安庆 246133
    2上海体育大学心理学院, 上海 200438
  • 收稿日期:2021-09-24 发布日期:2023-07-26 出版日期:2023-10-25
  • 通讯作者: 孟海江, E-mail: mhaijiang@163.com
  • 基金资助:
    安徽省哲学社会科学规划项目(AHSKY2018D58)

Differences in motor cortex synaptic plasticity associated with two forms of exercise in older adults: Evidence from TMS studies

MENG Haijiang1(), CHEN Lei1, WANG Gang1, ZHANG Jian2   

  1. 1School of Sports, Anqing Normal University, Anqing 246133, China
    2Department of Psychology, Shanghai University of Sport, Shanghai 200438, China
  • Received:2021-09-24 Online:2023-07-26 Published:2023-10-25

摘要:

尽管研究发现运动锻炼会导致大脑运动皮层可塑性改变, 但对不同形式运动锻炼老年人初级运动皮层突触可塑性变化的差异性却知之甚少。研究采用经颅磁刺激技术, 横向比较了乒乓球锻炼老年人、太极拳锻炼老年人和久坐老年人在配对联合刺激(PAS25)前、后动作诱发电位和短时程皮层内抑制的变化。结果发现, 经常参与乒乓球和太极拳运动锻炼老年人PAS25后的动作诱发电位振幅持续增强, 且乒乓球锻炼老年人增强的幅度显著高于太极拳锻炼老年人。三组老年人PAS25后各个时间点的短时程皮层内抑制均没有差异性。提示不同形式运动锻炼老年人初级运动皮层突触可塑性增强存在运动项目差异性。

关键词: 运动锻炼, 老年人, 经颅磁刺激, 动作诱发电位, 运动皮层

Abstract:

Although studies have found that exercise can lead to changes in the plasticity of the motor cortex, little is known about the changes in primary motor cortex synaptic plasticity associated with different forms of exercise among older adults. The purpose of this study was to compare the differences in motor cortex synaptic plasticity associated with a small hand muscle among older adults who regularly participated in table tennis or tai chi or who were sedentary.

Based on inclusion/exclusion criteria and their answers to a self-reported questionnaire, 54 older adults (60~70 years) were selected who often participated in table tennis (n = 18) or tai chi (n = 18) exercise or who were sedentary (n= 18). The target muscle was the abductor pollicis brevis of the right hand. Motor cortex synaptic plasticity associated with the abductor pollicis brevis muscle was induced by a paired combination of peripheral nerve electrical stimulation and transcranial magnetic stimulation with an interval of 25 ms (PAS25). Single-pulse and double-pulse transcranial magnetic stimulation was applied to the left primary motor cortex to measure changes in motor evoked potentials (MEPs) and short-interval intracortical inhibition recorded in the abductor pollicis brevis muscle before and after PAS25, to compare the differences in primary motor cortex synaptic plasticity among the three groups.

The results showed that mean MEP amplitudes immediately and 30 and 60 min after PAS25 in the table tennis group were significantly higher than those in sedentary group; mean MEP amplitudes immediately and 30 min after PAS25 in the tai chi group were significantly higher than those in the sedentary group; and mean MEP amplitudes immediately and 30 and 60 min after PAS25 in the table tennis group were significantly higher than those in the tai chi group. There were no differences in the short-interval intracortical inhibition at any time point after PAS25 among the three groups.

These results indicated that regular participation in table tennis or tai chi can induce a sustained increase in primary motor cortex excitability in older adults and that there are differences in primary motor cortex synaptic plasticity in older adults associated with different forms of exercise. These results suggest that increased synaptic plasticity in the motor cortex may play an important role in the acquisition and promotion of motor skills during exercise in older adults.

Key words: physical exercise, older adults, transcranial magnetic stimulation, motor evoked potential, motor cortex

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