2nd Middle East Conference on Biomedical Engineering最新文献_第4页

Influence of stroke location on heart rate variability in robot-assistive neurorehabilitation 脑卒中位置对机器人辅助神经康复中心率变异性的影响

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783252

H. Jelinek, K. August, Md. Hasan Imam, K. Khalaf, A. Koenig, R. Riener, M. Palaniswami, A. Khandoker

{"title":"Influence of stroke location on heart rate variability in robot-assistive neurorehabilitation","authors":"H. Jelinek, K. August, Md. Hasan Imam, K. Khalaf, A. Koenig, R. Riener, M. Palaniswami, A. Khandoker","doi":"10.1109/MECBME.2014.6783252","DOIUrl":"https://doi.org/10.1109/MECBME.2014.6783252","url":null,"abstract":"Active mental engagement and a positive emotional state are prerequisites for optimal outcomes of rehabilitation programs for stroke patients. Our program at the ETH, Zurich utilizes a closed loop response in automated robot-assist gait training coupled with virtual reality provided tasks. Heart rate variability has been shown to be sensitive to cognitive as well as emotional states as well as pathophysiological-environmental challenges. We investigated whether adaptation to a task differs between stroke patients with either cortical or subcortical lesions. Seven non-stroke control participants were compared to responses of nine stroke patients with either a diagnosis of cortical or subcortical stroke using heart rate variability. The robot-assist virtual reality training session consisted of a familiarization period, a baseline walking period, an under-challenged, appropriate challenged and over-challenged condition. Time and frequency domain as well as nonlinear features were assessed. Our results indicated that only entropy was sensitive to identifying adaptation to a different level of difficulty. Thus a significant difference was seen between the three stroke groups and control for adaption from baseline to the under-challenged condition (p=0.026), and also from the under-challenged condition to an appropriate level of challenge (p=0.027). We propose that the entropy feature provides a robust index of cognitive and emotional level associated with task difficulty experienced by post-stroke patients that allows real time closed loop regulation of robot-assist gait rehabilitation.","PeriodicalId":384055,"journal":{"name":"2nd Middle East Conference on Biomedical Engineering","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134445823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

An aortic arch flow loop for the study of hemodynamic-induced endothelial cell injury and inflammation 用于血流动力学诱导的内皮细胞损伤和炎症研究的主动脉弓血流环

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783208

M. M. Alloush, G. F. Oweis, R. Nasr, A. Zeidan

引用次数: 2

A scalable 64 channel neurostimulator based on a hybrid architecture of current steering DAC 基于电流转向DAC混合架构的可扩展64通道神经刺激器

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783218

Mario A. Meza-Cuevas, D. Schroeder, W. Krautschneider

引用次数: 7

Accelerating dynamic MRI by compressed sensing reconstruction from undersampled k-t space with spiral trajectories 从欠采样k-t空间与螺旋轨迹压缩感知重建加速动态MRI

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783197

Azar Tolouee, J. Alirezaie, P. Babyn

引用次数: 2

Electrode reduction using ICA and PCA in P300 Visual Speller Brain-Computer Interface system 基于ICA和PCA的P300视觉拼字机脑机接口系统电极还原

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783277

A. E. Selim, M. Wahed, Y. Kadah

{"title":"Electrode reduction using ICA and PCA in P300 Visual Speller Brain-Computer Interface system","authors":"A. E. Selim, M. Wahed, Y. Kadah","doi":"10.1109/MECBME.2014.6783277","DOIUrl":"https://doi.org/10.1109/MECBME.2014.6783277","url":null,"abstract":"Brain-Computer Interface (BCI) research aims at developing systems helping disabled people hereafter called subjects. Due to the fact that technology underlying BCI is not yet mature enough and still having shortcomings for usage out of laboratory, these prevent their widespread application. These shortcomings are caused by limitations in functionality of BCI system tools and techniques. The motivation of this work was to develop efficient BCI techniques including signal processing, feature extraction, pattern recognition and classification to improve the performance of P300 Visual Speller BCI system. Data sets used in this paper were acquired using BCI2000's P300 Speller paradigm provided by BCI competitions. Primarily, in the processing phase time domain and spatial domain feature extraction were applied. Followed by classification phase where various linear and extended linear classifiers were utilized. One of the main achievements of this paper is applying Independent Component Analysis (ICA) or Principal Component Analysis (PCA) as spatial domain feature extraction for dimensionality and artifact reduction. Reducing electrodes to half its original size highly improved performance with linear classifiers and yet outperformed the results of BCI competition winners with extended linear classifiers.","PeriodicalId":384055,"journal":{"name":"2nd Middle East Conference on Biomedical Engineering","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131523559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Electrical capacitance volume tomography for human brain motion activity observation 电容量体层析成像在人脑运动活动观察中的应用

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783227

W. Taruno, M. Ihsan, M. Baidillah, Timothy Tandian, Mahdi Mahendra, Mohammed Aljohani

引用次数: 14

Automatic shadow enhancement in intra vascular ultrasound (IVUS) images 血管内超声(IVUS)图像的自动阴影增强

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783266

Maryam Basij, A. Taki, M. Yazdchi

引用次数: 10

A space-efficient solution to find the maximum overlap using a compressed suffix array 使用压缩后缀数组查找最大重叠的节省空间的解决方案

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783270

M. Rachid, Q. Malluhi, M. Abouelhoda

引用次数: 7

A two layer texture modeling based on curvelet transform and spiculated lesion filters for recognizing architectural distortion in mammograms 基于曲波变换和针状病变滤波器的两层纹理建模用于乳房x线照片的结构畸变识别

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783198

Sahar Khoubani, Hamid Sheikhzadeh Nadjar, E. Fatemizadeh, Elham Mohammadi

引用次数: 4

Modulation of mRNA circadian transcription cycle by microRNAs microRNAs对mRNA昼夜转录周期的调控

2nd Middle East Conference on Biomedical Engineering Pub Date : 2014-04-07 DOI: 10.1109/MECBME.2014.6783235

A. Ptitsyn, N. Ptitsyna, Emad Elsebakhi, F. Marincola, Rashid J. Al-Ali, M. Temanni, Rawan AlSaad, E. Wang

引用次数: 1