中国卒中杂志2026，Vol.21Issue(3)：263-272,10.DOI:10.3969/j.issn.1673-5765.2026.03.002
基于脑机接口探究卒中患者二便运动任务的脑电特征
Electroencephalographic Characteristics of Urination and Defecation Motor Tasks in Stroke Patients Using a Brain-Computer Interface
摘要
Abstract
Objective This study explores the electroencephalographic(EEG)characteristics of stroke patients during urination and defecation motor tasks using brain-computer interface(BCI)technology.By elucidating the central neural mechanisms underlying the control of excretion,this research aims to construct a BCI paradigm for urination and defecation motor tasks suitable for stroke patients,and to provide novel insights for the rehabilitation of post-stroke patients suffering from urination and defecation dysfunction. Methods Stroke patients admitted to the Huashan Hospital,Fudan University,and the Shandong Provincial Third Hospital between September 2024 and April 2025 were enrolled.All patients were instructed to perform urination and defecation motor tasks,while their EEG features were recorded.By analyzing electroencephalography brain maps,time-frequency plots,and event-related spectral perturbation values,this study elucidates the temporal characteristics of EEG signals during the initiation and maintenance of these motor tasks,as well as the differences in frequency characteristics within the α(8-13 Hz),β1(＞13-20 Hz),and β2(＞20-30 Hz)frequency bands. Results A total of 14 stroke patients were enrolled in this study,comprising five females and nine males,with a mean age of(52.7±14.4)years.Electroencephalography brain maps analysis revealed that both urination/defecation retention and voiding tasks induced significant event-related desynchronization(ERD).These responses exhibited distinct spatiotemporal and spectral characteristics across the α,β1,and β2 frequency bands.Specifically,the task initiation phase(0-2 s)elicited widespread activation across all frequency bands,whereas the task maintenance phase(＞2-5 s)was predominantly concentrated in the α frequency band.Furthermore,the frontal cortex demonstrated sustained engagement in the β2 frequency band during the inhibitory control of urination and defecation. Conclusions This study elucidates the staged dynamic neural mechanisms underlying urination and defecation motor control.It reveals that,upon the initiation of urination and defecation motor tasks,stroke patients exhibit ERD bursts within the α,β1,and β2 frequency bands.These findings provide a significant theoretical foundation for the design and application of BCI systems.关键词
脑机接口/二便障碍/运动想象/脑电分析/卒中Key words
Brain-computer interface/Urination and defecation dysfunction/Motor imagery/Electroencephalographic analysis/Stroke分类
医药卫生引用本文复制引用
薛川,张春华,韩云,韩君婷,王珊珊,吕蕾,贾杰..基于脑机接口探究卒中患者二便运动任务的脑电特征[J].中国卒中杂志,2026,21(3):263-272,10.基金项目
上海市"科技创新行动计划"养老科技支撑专项项目(24YL1900200) （24YL1900200）
