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腓肠肌共激活程度较健康老年人进一步增高。值 dopa⁃unresponsive freezing of gait[J]. J Parkinsons Dis,
得注意的是,本研究发现FOG患者的这种代偿作用 2022,12:2507-2518
较 nFOG 明显降低,但是相关分析结果提示这种代 [3] CHEUNG V C K,SEKI K. Approaches to revealing the neu⁃
偿机制仍然存在,即 FOG 患者的步态变异性增高 ral basis of muscle synergies:a review and a critique[J].
J Neurophysiol,2021,125(5):1580-1597
(稳定性降低)可以通过增强胫骨前肌⁃腓肠肌共同
[4] BREU M S,SCHNEIDER M,KLEMT J,et al. People with
收缩以维持步态稳定。
Parkinson’s disease and freezing of gait show abnormal
本研究存在一定的局限性。首先,本研究样本
low frequency activity of antagonistic leg muscles[J].
量较小且 PD 患者是在药物“开”期进行的步态和
Front Hum Neurosci,2021,15:733067
sEMG 检测,未来应该增大样本量探索不同状态下
[5] GUNTHER M,BARTSCH R P,MIRON⁃SHAHAR Y,et
FOG患者的sEMG改变。但是本研究中FOG均为左 al. Coupling between leg muscle activation and EEG dur⁃
旋多巴抵抗型,一定程度上减少了药物的影响。同 ing normal walking,intentional stops,and freezing of gait
时,数据分析将 LEDD 纳入协变量以进一步降低药 in Parkinson’s disease[J]. Front Physiol,2019,10:870
物的影响。此外,尽管本研究在同一任务状态下采 [6] WANG X Y,KANG W Y,YANG Q,et al. Using gastroc⁃
集步态时空学参数和sEMG数据,且2次检查间隔时 nemius sEMG and plasma alpha⁃synuclein for the predic⁃
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步采集的,这可能会干扰相关性分析的结果。未来 PLoS One,2014,9(2):e89353
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综上,本研究发现FOG患者的胫骨前肌和腓肠
71-78
肌在摆动前期 sEMG 活动明显降低,尤其腓肠肌
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一个关键特征。此外,在 PD 中 FOG 患者在摆动相
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利益冲突声明: [9] RUONALA V,PEKKONEN E,AIRAKSINEN O,et al. Le⁃
所有作者声明无利益冲突。
vodopa⁃induced changes in electromyographic patterns in
Conflict of Interests:
patients with advanced Parkinson’s disease[J]. Front
The authors have no conflicts of interest to declare. Neurol,2018,9:35
作者贡献:
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朱晓磊:研究计划与实施;计敏:研究实施与数据统计;
input,synergies and size principle:Control of spinal mo⁃
史东艳:研究实施;孙慧敏:研究实施;王丽娜:研究计划、实 tor neurons for movement generation[J]. J Physiol,2023,
施与写作;张克忠:研究计划、资金支持以及对工作的各个方
601(1):11-20
面负责。
[11]ZSCHORLICH V R,BEHRENDT F,DE LUSSANET M H
Author’s Contributions:
E. Multimodal sensorimotor integration of visual and kin⁃
ZHU Xiaolei was responsible for research planning and
aesthetic afferents modulates motor circuits in humans[J].
implementation;JI Min contributed to research implementation
Brain Sci,2021,11(2):187
and data analysis;SHI Dongyan and SUN Huimin were involved
[12]GEORGIADES M J,SHINE J M,GILAT M,et al. Hitting
in research implementation;WANG Lina handled research
the brakes:pathological subthalamic nucleus activity in
planning,implementation,and writing;ZHANG Kezhong was
Parkinson’s disease gait freezing[J]. Brain,2019,142
in charge of research planning,financial support,and overall
(12):3906-3916
responsibility for the work.
[13]SOLOMON J P,KRAEUTNER S N,BARDOUILLE T,et
[参考文献] al. Probing the temporal dynamics of movement inhibition
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ferent inhibition in Parkinson’s disease patients with L⁃ (下转第55页)

