摘要
焦虑是一种常见的情绪障碍,其严重时会显著影响个体的身心健康。已有研究表明,睡眠与焦虑存在双向调控关系,高质量睡眠有助于缓解焦虑情绪。为提高在睡眠环境下对焦虑患者脑电信号的分析准确率,该文提出一种改进型特征金字塔网络(IFPN)模型。在IFPN模型中,首先,对焦虑患者睡眠前后脑电信号进行预处理,采用脑电信号标准化和特征金字塔网络去噪,以统一脑电信号尺度并去除噪声。然后,将预处理后焦虑患者的睡眠脑电数据转换为脑熵地形图,以强化在睡眠环境下对焦虑改善的脑电信号分析能力,接着,利用改进型特征金字塔网络对脑熵地形图进行特征提取,生成特征脑地形图。最后,将特征脑地形图输入到ResNet-50进行脑电信号分析。本文在开源数据集上验证了IFPN模型的有效性。实验结果表明,在睡眠环境下,采用所提模型能够进一步提升针对焦虑脑电信号的分析能力和准确率,从而为分析睡眠对于焦虑的改善作用提供深入的理论和实验支撑。
Objective Anxiety is a common emotional disorder,characterized by excessive worry and fear,which negatively affects mental,physical,and social well-being.A bidirectional relationship exists between anxiety and sleep,poor sleep quality worsens anxiety symptoms,and anxiety disrupts normal sleep patterns.ElectroEncephaloGraphy(EEG)signals provide a non-invasive and informative means to investigate brain activity,making them useful for studying the neurophysiological underlying this association.However,conventional EEG analysis methods often fail to capture the complex,multiscale features needed to assess anxiety modulation during sleep.This study proposes an Improved Feature Pyramid Network(IFPN)model to enhance EEG analysis in sleep settings,with the aim of improving the detection and interpretation of anxietyrelated brain activity.Methods The IFPN model comprises a preprocessing module,feature extraction module,and classification module,each being optimized for analyzing EEG signals related to anxiety during sleep.The preprocessing module applies Z-score normalization to EEG signals from individuals with anxiety to standardize signal amplitude across channels.Noise artifacts are reduced using a denoising process based on a feature pyramid network.Preprocessed signals are then converted into brain entropy topographies using Singular Spectral Entropy(SSE),which quantifies signal complexity.These entropy maps are processed by the IFPN backbone,which incorporates convolutional layers,SSE-guided upsampling,and lateral connections to enable multiscale feature fusion.The resulting features are input to a modified ResNet-50 network for classification,with SSEbased regularization applied to enhance model robustness and accuracy.The model is evaluated using two independent EEG datasets:a sleep deprivation dataset and a cognitive-state EEG dataset,both comprising participants with levels of anxiety.Results and Discussions The experimental results demonstrate that the IFPN model improves the detection of anxiety-related features in EEG signals during sleep.Spectral power analysis shows a significant reduction inβ-band power after sleep,reflecting decreased hyperarousal commonly associated with anxiety.In Dataset 1,β-band power declines from 16%to 13%(p<0.01),and in Dataset 2,from 19.5%to 15%(p<0.05).This is accompanied by an increase in theθ/βpower ratio,suggesting a shift toward a more relaxed neural state postsleep.The IFPN model achieves 85%accuracy in identifying severe anxiety,outperforming baseline methods,which reach 78%.This improvement results from the model’s capacity to integrate multiscale features and selectively emphasize anxiety-related patterns,supporting more accurate classification of elevated anxiety states.Conclusions This study proposes an IFPN model for EEG analysis during sleep,with a focus on detecting anxiety-related neural activity.Unlike traditional approaches that rely on shallow architectures or frequencylimited metrics,the IFPN model addresses the multiscale and spatially heterogeneous nature of brain activity associated with anxiety.By incorporating SSE as a nonlinear dynamic feature,the model captures subtle regional and frequency-specific variations in EEG complexity.SSE functions as both a signal complexity metric and a functional biomarker of neural disorganization linked to anxiety.Integrated with the multiscale fusion capability of the feature pyramid network,SSE enhances the model’s ability to extract salient spatiotemporal features relevant to anxiety states.Experimental results show that the IFPN model outperforms existing methods in both accuracy and robustness,particularly in identifying severe anxiety,where conventional models often struggle due to noise and reduced discriminative performance.These findings highlight the model’s potential utility in clinical assessment of anxiety during sleep.
作者
黄辰
马耀龙
张龑
王时绘
杨超
宋建华
陈侃松
杨伟平
HUANG Chen;MA Yaolong;ZHANG Yan;WANG Shihui;YANG Chao;SONG Jianhua;CHEN Kansong;YANG Weiping(School of Computer Science and Information Engineering,Hubei University,Wuhan 430062,China;Key Laboratory of Intelligent Sensing System and Security,Ministry of Education,Wuhan 430062,China;Hubei Key Laboratory of Big Data Intelligent Analysis and Application,Wuhan 430062,China;Hubei Province Project of Key Research Institute of Humanities and Social Sciences at Universities,Wuhan 430062,China;School of Cyber Science and Technology,Hubei University,Wuhan 430062,China;Faculty of Education,Hubei University,Wuhan 430062,China)
出处
《电子与信息学报》
北大核心
2025年第8期2935-2944,共10页
Journal of Electronics & Information Technology
基金
武汉市知识创新专项项目(202311901251001)
湖北省科技计划重大科技专项(2024BAA008)
湖北省重大攻关项目(2023BAA018)
深圳市科技攻关重点项目(2020N061)。
关键词
睡眠
焦虑
脑电图
改进型特征金字塔网络
奇异谱熵
Sleep
Anxiety
ElectroEncephaloGraphy(EEG)
Improve Feature Pyramid Network(IFPN)
Singular Spectral Entropy(SSE)
