Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, 310058, China.
Taizhou Key Laboratory of Medical Devices and Advanced Materials, Research Institute of Zhejiang University-Taizhou, Taizhou, 318000, China.
Neurosci Bull. 2024 Jan;40(1):79-89. doi: 10.1007/s12264-023-01143-5. Epub 2023 Nov 22.
Sensory conflict impacts postural control, yet its effect on cortico-muscular interaction remains underexplored. We aimed to investigate sensory conflict's influence on the cortico-muscular network and postural stability. We used a rotating platform and virtual reality to present subjects with congruent and incongruent sensory input, recorded EEG (electroencephalogram) and EMG (electromyogram) data, and constructed a directed connectivity network. The results suggest that, compared to sensory congruence, during sensory conflict: (1) connectivity among the sensorimotor, visual, and posterior parietal cortex generally decreases, (2) cortical control over the muscles is weakened, (3) feedback from muscles to the cortex is strengthened, and (4) the range of body sway increases and its complexity decreases. These results underline the intricate effects of sensory conflict on cortico-muscular networks. During the sensory conflict, the brain adaptively decreases the integration of conflicting information. Without this integrated information, cortical control over muscles may be lessened, whereas the muscle feedback may be enhanced in compensation.
感觉冲突会影响姿势控制，但它对皮质-肌肉相互作用的影响仍未得到充分探索。我们旨在研究感觉冲突对皮质-肌肉网络和姿势稳定性的影响。我们使用旋转平台和虚拟现实向受试者呈现一致和不一致的感觉输入，记录脑电图（EEG）和肌电图（EMG）数据，并构建了一个有向连通性网络。结果表明，与感觉一致相比，在感觉冲突期间：（1）感觉运动、视觉和顶后皮质之间的连通性普遍降低，（2）皮质对肌肉的控制减弱，（3）肌肉向皮质的反馈增强，以及（4）身体摆动的范围增加，其复杂性降低。这些结果强调了感觉冲突对皮质-肌肉网络的复杂影响。在感觉冲突期间，大脑自适应地减少冲突信息的整合。没有这种整合信息，皮质对肌肉的控制可能减弱，而肌肉反馈可能会增强以进行补偿。
