Alterations in functional connectivity of the brain during postural balance maintenance with auditory stimuli: a stabilometry and electroencephalogram study.

IF 1.3 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Lyubov Oknina, Ekaterina Strelnikova, Li-Fong Lin, Margarita Kashirina, Andrey Slezkin, Vladimir Zakharov
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Abstract

Objectives.In daily life, individuals continuously integrate motor and cognitive tasks, a process that is made possible by multisensory integration within the brain. Despite its importance, the neurophysiological mechanisms underlying the integration of stimuli from different sensory modalities remain unclear. The objective of this study was to investigate the characteristics of functional connectivity (FC) in healthy adults during a balance task with additional auditory stimuli.Materials& Methods.This study involved the simultaneous recording of stabilometry and electroencephalogram (EEG) in 17 healthy volunteers. The experimental design included two tasks. In the first task, participants were required to maintain their center of pressure on a stabilometric platform while receiving visual feedback on body position (VBF). In the second task, participants performed the same task but with the addition of auditory stimuli in the form of music (VBF+MUSIC). The FCs values of EEG signals were analyzed using the coherence method.Results.Analysis of the stabilometric data revealed that the most significant differences between the tasks were observed in the dynamic indicators related to the maintenance of the vertical body position. The values of the Quality of the balance function decreased with the expected increase in the cognitive load. EEG analysis showed that the value of functional connectivity (FC) was lower in VBF+MUSIC compared to VBF. Significant difference of FCs was detected between the right primary auditory cortex and associative auditory cortex involved in delta and theta rhythms that may reflect difference in auditory data processing, whereas differences in alpha and beta rhythms were found in the parietal region, which may reflect different level of attention.Conclusion.This study demonstrated that the presence of auditory stimuli leads to changes in postural balance indicators that specifically reflect oscillations in the sagittal plane. These findings suggest multiple neurophysiological levels of postural control in multisensory environments.

听觉刺激下体位平衡维持过程中脑功能连通性的改变:一项稳定性测量和脑电图研究。
在日常生活中,个体不断整合运动和认知任务,这一过程是通过大脑内的多感觉整合实现的。尽管它很重要,但不同感觉模式刺激整合的神经生理机制仍不清楚。本研究的目的是探讨健康成人在额外听觉刺激下进行平衡任务时的功能连通性(FC)特征。材料与方法本研究同时记录了17名健康志愿者的稳定性测量和脑电图(EEG)。实验设计包括两个任务。在第一个任务中,参与者被要求保持他们的压力中心在一个稳定的平台上,同时接受关于身体位置(VBF)的视觉反馈。在第二个任务中,参与者执行相同的任务,但增加了音乐形式的听觉刺激(VBF+ music)。结果稳定性数据分析显示,任务间差异最显著的是与身体垂直位置维持相关的动态指标。平衡功能的质量随认知负荷的增加而降低。脑电分析显示,VBF+MUSIC组功能连通性(FC)值较VBF组低。在右侧初级听觉皮层和联合听觉皮层中,参与δ和θ节奏的FCs存在显著差异,这可能反映了听觉数据处理的差异,而在顶叶区域则发现了α和β节奏的差异。结论 ;本研究表明,听觉刺激的存在会导致姿势平衡指标的变化,这些指标专门反映矢状面振荡。这些发现表明,在多感觉环境中,姿势控制存在多个神经生理水平。
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来源期刊
Biomedical Physics & Engineering Express
Biomedical Physics & Engineering Express RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-
CiteScore
2.80
自引率
0.00%
发文量
153
期刊介绍: BPEX is an inclusive, international, multidisciplinary journal devoted to publishing new research on any application of physics and/or engineering in medicine and/or biology. Characterized by a broad geographical coverage and a fast-track peer-review process, relevant topics include all aspects of biophysics, medical physics and biomedical engineering. Papers that are almost entirely clinical or biological in their focus are not suitable. The journal has an emphasis on publishing interdisciplinary work and bringing research fields together, encompassing experimental, theoretical and computational work.
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