2015 7th International IEEE/EMBS Conference on Neural Engineering (NER)最新文献_第2页

Hybrid fNIRS-EEG based discrimination of 5 levels of memory load 基于fNIRS-EEG混合的5级记忆负荷判别

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146546

C. Herff, Ole Fortmann, C. Tse, Xiaoqin Cheng, F. Putze, D. Heger, Tanja Schultz

{"title":"Hybrid fNIRS-EEG based discrimination of 5 levels of memory load","authors":"C. Herff, Ole Fortmann, C. Tse, Xiaoqin Cheng, F. Putze, D. Heger, Tanja Schultz","doi":"10.1109/NER.2015.7146546","DOIUrl":"https://doi.org/10.1109/NER.2015.7146546","url":null,"abstract":"In this study, we show that both electroencephalograhy (EEG) and functional Near-Infrared Spectroscopy (fNIRS) can be used to discriminate between 5 levels of memory load. We induce memory load with the memory updating task, which is known to robustly generate memory load and allows us to define 5 different levels of load. Typical experiments only discriminate between low and high workload or up to a maximum of three classes. To the best of our knowledge, the memory updating task has not been used in combination with brain activity measurements before. Here, accuracies of up to 93% are achieved for the binary classification between very high and very low workload. On average, two levels of workload could be discriminated with 74% accuracy. Classification between the full five classes yielded 44% accuracy on average. Despite the fact that EEG results consistently outperformed the results obtained with fNIRS, we could show that the feature-level fusion of both modalities increased robustness of classification results. A reliable discrimination between different levels of memory load could be used to adapt user interfaces or present the right amount of information to a learner.","PeriodicalId":137451,"journal":{"name":"2015 7th International IEEE/EMBS Conference on Neural Engineering (NER)","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127374007","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: 20

Evaluating the electrode measurement sensitivity of subdermal electroencephalography electrodes 皮下脑电图电极测量灵敏度的评价

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146818

Miguel Rodrigues Mendes, N. Subramaniyam, Katrina Wendel-Mitoraj

{"title":"Evaluating the electrode measurement sensitivity of subdermal electroencephalography electrodes","authors":"Miguel Rodrigues Mendes, N. Subramaniyam, Katrina Wendel-Mitoraj","doi":"10.1109/NER.2015.7146818","DOIUrl":"https://doi.org/10.1109/NER.2015.7146818","url":null,"abstract":"This paper studies the effect of subdermal EEG lead placement on measurement sensitivity distributions, and compares them with the sensitivity distributions obtained using surface EEG leads. A five-layered isotropic head model was constructed based on magnetic resonance imaging (MRI) data. The surface electrodes were placed on the scalp of the model according to the traditional 10-20 EEG system. The subdermal electrodes were arranged in 5 × 5 grids and placed on the skull in seven reference locations: FZ, CZ, OZ, T3, T4, P3, and P4. The effects on the measurement sensitivity were studied by means of the half-sensitivity volume (HSV). For the surface measurements, the size of the HSV varies around 1 cm3, while the subdermal leads can concentrate the measurement in regions ten times smaller. The results indicate that the EEG measurement may benefit from subdermal implantation since the subdermal measurements are more accurate and specific than the surface measurements. Nevertheless, the improvement was registered only for the subdermal grids centred on CZ, T3 and T4 locations. This suggests that the subdermal electrode performance highly depends on the thickness of the underlying matter, such as the skull and cerebrospinal fluid (CSF).","PeriodicalId":137451,"journal":{"name":"2015 7th International IEEE/EMBS Conference on Neural Engineering (NER)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124834779","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: 1

Segmentation of neuron and measurement of optically programed neurite growth: Fast automation via Bayesian thresholding 神经元的分割和光学编程神经突生长的测量:通过贝叶斯阈值快速自动化

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146794

P. Reddy, Saurabh Shukla, A. Karunarathne, S. Jana, L. Giri

引用次数: 0

Near infra-red spectroscopy combined with transcranial direct current stimulation in FPGA-based hardware for point of care testing of cerebral vascular status - A stroke study 近红外光谱结合经颅直流电刺激在基于fpga的硬件点护理测试脑血管状态-中风研究

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146805

Utkarsh Jindal, Mehak Sood, Abhijit Das, S. R. Chowdhury, Anirban Dutta

{"title":"Near infra-red spectroscopy combined with transcranial direct current stimulation in FPGA-based hardware for point of care testing of cerebral vascular status - A stroke study","authors":"Utkarsh Jindal, Mehak Sood, Abhijit Das, S. R. Chowdhury, Anirban Dutta","doi":"10.1109/NER.2015.7146805","DOIUrl":"https://doi.org/10.1109/NER.2015.7146805","url":null,"abstract":"Cerebral vascular status can be evaluated with cerebrovascular reactivity (CVR) that reflects the capacity of blood vessels to dilate, and is an important marker for brain vascular reserve. Here, transcranial direct current stimulation (tDCS) can up- and down- regulate cortical excitability depending on current direction, and anodal tDCS can increase regional cerebral blood flow during stimulation. Impairments in CVR have been associated with increased risk of ischemic events. Here, near-infrared spectroscopy (NIRS) is a cerebral monitoring method that can be used for non-invasive and continuous measurement of cerebral vascular status under various clinical conditions. This paper describes the development of a 4-channel continuous wave NIRS combined with tDCS in an FPGA-based hardware that captured the hemodynamic changes in the frontal cortex of the brain, as a measure of CVR, before and after anodal tDCS. We recruited 14 patients with established and acute ischemic stroke (<;1 month) localized to a single hemisphere (10 male and 4 females from age 42 to 73). The affected hemisphere with impaired circulation showed significantly less (0.26 +/- 0.28), p<;0.01, change in cerebral hemoglobin oxygenation than the healthy side (3.43+/- 0.86) in response to anodal tDCS. Thus, combining NIRS with tDCS can lend to low-cost point of care testing of cerebral vascular status so we present a NIRS-tDCS based adaptive neuro-fuzzy inference system implemented in a FPGA-based hardware.","PeriodicalId":137451,"journal":{"name":"2015 7th International IEEE/EMBS Conference on Neural Engineering (NER)","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116421928","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: 1

Vergence control learning through real V1 disparity tuning curves 收敛控制学习通过真实的V1视差调整曲线

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146627

A. Gibaldi, A. Canessa, S. Sabatini

{"title":"Vergence control learning through real V1 disparity tuning curves","authors":"A. Gibaldi, A. Canessa, S. Sabatini","doi":"10.1109/NER.2015.7146627","DOIUrl":"https://doi.org/10.1109/NER.2015.7146627","url":null,"abstract":"A neural network architecture able to autonomously learn effective disparity-vergence responses and drive the vergence eye movements of a simulated binocular active vision system is proposed. The proposed approach, instead of exploiting purposely designed resources, relies on the direct use of a set of real disparity tuning curves, measured in the primary visual cortex of two macaque monkeys and courteously made available by (Prince et al., 2002), that provides a distributed representation of binocular disparity. The network evolves following a differential Hebbian rule that exploits the overall population activity to measure the state of the system, i.e. the deviation from the desired vergence position, so as its modification as a consequence of the action performed. Accordingly, the signal provides an effective intrinsic reward to develop a stable and accurate vergence behaviour. Emerging from a direct interaction of the sensing system with the environment, the resulting control provides a precise and accurate control for small disparities, as well as a raw control on a broader working range when large disparities are experienced. The developed control converges to a stable state that intrinsically and continuously adapts to the characteristics of the ongoing stimulation. The results proved how actually naturally distributed resources allows for robust and flexible learning capabilities in changeable situations.","PeriodicalId":137451,"journal":{"name":"2015 7th International IEEE/EMBS Conference on Neural Engineering (NER)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114572956","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 approach to develop an objective measure of temporal processing in cochlear implant users based on Schroeder-phase harmonic complexes 一种基于施罗德相位谐波复合物的人工耳蜗使用者时间加工的客观测量方法

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146719

Anne M. Leijsen, Alejandro Lopez-Valdes, Myles McLaughlin, Jaclyn Smith, L. Viani, P. Walshe, R. Reilly

{"title":"An approach to develop an objective measure of temporal processing in cochlear implant users based on Schroeder-phase harmonic complexes","authors":"Anne M. Leijsen, Alejandro Lopez-Valdes, Myles McLaughlin, Jaclyn Smith, L. Viani, P. Walshe, R. Reilly","doi":"10.1109/NER.2015.7146719","DOIUrl":"https://doi.org/10.1109/NER.2015.7146719","url":null,"abstract":"Recent evidence suggests that cortical auditory evoked potentials recorded by EEG may be used to obtain an objective measure of spectral sound processing abilities in cochlear implant (CI) users. As speech perception depends on both spectral and temporal processing abilities, developing an objective measure of sound processing in the temporal domain is necessary for a complete evaluation of CI speech performance. This study explored the feasibility to objectively assess sound processing in the temporal domain employing a method based on EEG and complex temporal stimuli such as the Schroeder-phase harmonic complexes. Psychoacoustic discrimination abilities were measured employing a four-interval two-alternative forced choice paradigm. Neural discrimination abilities were measured by recording single-channel EEG during an unattended oddball paradigm. Psychoacoustic and neural discrimination abilities were analyzed for correlation. A strong, but non-significant, correlation was found in three out of six subjects. Schroeder-phase harmonic complexes may have utility as stimuli in the development of an objective measure of temporal processing in CI users. Furthermore, they provide new insights on temporal processing in CI users that may benefit the development of the CI.","PeriodicalId":137451,"journal":{"name":"2015 7th International IEEE/EMBS Conference on Neural Engineering (NER)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122215619","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: 0

Functional connectivity in cultured cortical networks during development: Comparison between correlation and information theory-based algorithms 发育过程中培养皮层网络的功能连通性:相关性和基于信息理论的算法的比较

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146637

Daniele Poli, Vito Paolo Pastore, P. Massobrio, S. Martinoia

引用次数: 0

Continuous prediction of shoulder joint angle in real-time 实时连续预测肩关节角度

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146733

Y. Aung, K. Anam, Adel Al-Jumaily

引用次数: 2

Development of a single-sided Parylene C based intrafascicular multichannel electrode for peripheral nerves 周围神经单面聚对二甲苯基束内多通道电极的研制

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146678

Matthias Müller, M. Ulloa, M. Schuettler, T. Stieglitz

{"title":"Development of a single-sided Parylene C based intrafascicular multichannel electrode for peripheral nerves","authors":"Matthias Müller, M. Ulloa, M. Schuettler, T. Stieglitz","doi":"10.1109/NER.2015.7146678","DOIUrl":"https://doi.org/10.1109/NER.2015.7146678","url":null,"abstract":"As cleanroom fabricated polyimide based electrodes are commonly used in clinical trials due to their small dimensions and high flexibility we want to translate these advantages to a maskless manufacturing technology and another substrate material with FDA approval: Parlyene C. Using a picosecond laser (355 nm Nd:YVO4) an established laser fabrication process (1064 nm Nd:YAG nansecond laser) for silicone rubber electrodes was modified to allow the fabrication of thin parylene C electrodes for intrafascicular application. The process utilizes a 25 μm thick platinum iridium foil that is placed between two 10 μm thick parylene C substrate layers. Using the laser for thinning down the metal, increasing the active surface and cutting the complete electrode array a new fabrication process is developed. Adhesion parameters of the involved materials are measured and tailored to fit each other. The single electrode arrays feature 4 intrafascicular contacts as well as a ground electrode and fixation openings outside the nerve. Functionality of the electrode array was measured and a first assessment of its usability has been performed. The mechanical and electrochemical parameters are promising for intrafascicular implantation, successful stimulation and recording application in a peripheral nerve.","PeriodicalId":137451,"journal":{"name":"2015 7th International IEEE/EMBS Conference on Neural Engineering (NER)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130283466","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: 4

Validating online recursive independent component analysis on EEG data 脑电数据在线递归独立分量分析验证

2015 7th International IEEE/EMBS Conference on Neural Engineering (NER) Pub Date : 2015-04-22 DOI: 10.1109/NER.2015.7146775

S. Hsu, T. Mullen, T. Jung, G. Cauwenberghs

{"title":"Validating online recursive independent component analysis on EEG data","authors":"S. Hsu, T. Mullen, T. Jung, G. Cauwenberghs","doi":"10.1109/NER.2015.7146775","DOIUrl":"https://doi.org/10.1109/NER.2015.7146775","url":null,"abstract":"The needs for online Independent Component Analysis (ICA) algorithms arise in a range of fields such as continuous clinical assessment and brain-computer interface (BCI). Among the online ICA methods, online recursive ICA algorithm (ORICA) has attractive properties of fast convergence and low computational complexity. However, there hasn't been a systematic comparison between an online ICA method such as ORICA and other offline (batch-mode) ICA algorithms on real EEG data. This study compared ORICA with ten ICA algorithms in terms of their decomposition quality, validity of source characteristics, and computational complexity on the thirteen experimental 71-ch EEG datasets. Empirical results showed that ORICA achieved higher mutual information reduction (MIR) and extracted more near-dipolar sources than algorithms such as FastICA, JADE, and SOBI did while the performance of ORICA approached that of the best-performed Infomax-based algorithms. Furthermore, ORICA outperforms most of ICA methods in terms of the computational complexity. The properties of fast convergence and low computational complexity of ORICA enable the realization of real-time online ICA process, which has further applications such as real-time functional neuroimaging, artifact reduction, and adaptive BCI.","PeriodicalId":137451,"journal":{"name":"2015 7th International IEEE/EMBS Conference on Neural Engineering (NER)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130548668","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: 4