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Frontiers in Neuroinformatics

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https://www.readbyqxmd.com/read/30425631/data-driven-classification-using-fmri-network-measures-application-to-schizophrenia
#1
Pantea Moghimi, Kelvin O Lim, Theoden I Netoff
Using classification to identify biomarkers for various brain disorders has become a common practice among the functional MR imaging community. Typical classification pipeline includes taking the time series, extracting features from them, and using them to classify a set of patients and healthy controls. The most informative features are then presented as novel biomarkers. In this paper, we compared the results of single and double cross validation schemes on a cohort of 170 subjects with schizophrenia and healthy control subjects...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30405386/mapping-the-human-brain-in-frequency-band-analysis-of-brain-cortex-electroencephalographic-activity-for-selected-psychiatric-disorders
#2
Grzegorz M Wojcik, Jolanta Masiak, Andrzej Kawiak, Lukasz Kwasniewicz, Piotr Schneider, Nikodem Polak, Anna Gajos-Balinska
There are still no good quantitative methods to be applied in psychiatric diagnosis. The interview is still the main and most important tool in the psychiatrist work. This paper presents the results of electroencephalographic research with the subjects of a group of 30 patients with psychiatric disorders compared to the control group of healthy volunteers. All subjects were solving working memory task. The digit-span working memory task test was chosen as one of the most popular tasks given to subjects with cognitive dysfunctions, especially for the patients with panic disorders, depression (including the depressive phase of bipolar disorder), phobias, and schizophrenia...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30405385/generalized-cross-frequency-decomposition-a-method-for-the-extraction-of-neuronal-components-coupled-at-different-frequencies
#3
Denis Volk, Igor Dubinin, Alexandra Myasnikova, Boris Gutkin, Vadim V Nikulin
Perceptual, motor and cognitive processes are based on rich interactions between remote regions in the human brain. Such interactions can be carried out through phase synchronization of oscillatory signals. Neuronal synchronization has been primarily studied within the same frequency range, e.g., within alpha or beta frequency bands. Yet, recent research shows that neuronal populations can also demonstrate phase synchronization between different frequency ranges. An extraction of such cross-frequency interactions in EEG/MEG recordings remains, however, methodologically challenging...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30364123/integrating-semi-supervised-and-supervised-learning-methods-for-label-fusion-in-multi-atlas-based-image-segmentation
#4
Qiang Zheng, Yihong Wu, Yong Fan
A novel label fusion method for multi-atlas based image segmentation method is developed by integrating semi-supervised and supervised machine learning techniques. Particularly, our method is developed in a pattern recognition based multi-atlas label fusion framework. We build random forests classification models for each image voxel to be segmented based on its corresponding image patches of atlas images that have been registered to the image to be segmented. The voxelwise random forests classification models are then applied to the image to be segmented to obtain a probabilistic segmentation map...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30356770/challenges-and-future-perspectives-on-electroencephalogram-based-biometrics-in-person-recognition
#5
REVIEW
Hui-Ling Chan, Po-Chih Kuo, Chia-Yi Cheng, Yong-Sheng Chen
The emergence of the digital world has greatly increased the number of accounts and passwords that users must remember. It has also increased the need for secure access to personal information in the cloud. Biometrics is one approach to person recognition, which can be used in identification as well as authentication. Among the various modalities that have been developed, electroencephalography (EEG)-based biometrics features unparalleled universality, distinctiveness and collectability, while minimizing the risk of circumvention...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30349472/detecting-multiple-change-points-using-adaptive-regression-splines-with-application-to-neural-recordings
#6
Hazem Toutounji, Daniel Durstewitz
Time series, as frequently the case in neuroscience, are rarely stationary, but often exhibit abrupt changes due to attractor transitions or bifurcations in the dynamical systems producing them. A plethora of methods for detecting such change points in time series statistics have been developed over the years, in addition to test criteria to evaluate their significance. Issues to consider when developing change point analysis methods include computational demands, difficulties arising from either limited amount of data or a large number of covariates, and arriving at statistical tests with sufficient power to detect as many changes as contained in potentially high-dimensional time series...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30349471/automatically-selecting-a-suitable-integration-scheme-for-systems-of-differential-equations-in-neuron-models
#7
Inga Blundell, Dimitri Plotnikov, Jochen M Eppler, Abigail Morrison
On the level of the spiking activity, the integrate-and-fire neuron is one of the most commonly used descriptions of neural activity. A multitude of variants has been proposed to cope with the huge diversity of behaviors observed in biological nerve cells. The main appeal of this class of model is that it can be defined in terms of a hybrid model, where a set of mathematical equations describes the sub-threshold dynamics of the membrane potential and the generation of action potentials is often only added algorithmically without the shape of spikes being part of the equations...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30337866/appian-automated-pipeline-for-pet-image-analysis
#8
Thomas Funck, Kevin Larcher, Paule-Joanne Toussaint, Alan C Evans, Alexander Thiel
APPIAN is an automated pipeline for user-friendly and reproducible analysis of positron emission tomography (PET) images with the aim of automating all processing steps up to the statistical analysis of measures derived from the final output images. The three primary processing steps are coregistration of PET images to T1-weighted magnetic resonance (MR) images, partial-volume correction (PVC), and quantification with tracer kinetic modeling. While there are alternate open-source PET pipelines, none offers all of the features necessary for making automated PET analysis as reliably, flexibly and easily extendible as possible...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30319386/decoding-steady-state-visual-evoked-potentials-from-electrocorticography
#9
Benjamin Wittevrongel, Elvira Khachatryan, Mansoureh Fahimi Hnazaee, Flavio Camarrone, Evelien Carrette, Leen De Taeye, Alfred Meurs, Paul Boon, Dirk Van Roost, Marc M Van Hulle
We report on a unique electrocorticography (ECoG) experiment in which Steady-State Visual Evoked Potentials (SSVEPs) to frequency- and phase-tagged stimuli were recorded from a large subdural grid covering the entire right occipital cortex of a human subject. The paradigm is popular in EEG-based Brain Computer Interfacing where selectable targets are encoded by different frequency- and/or phase-tagged stimuli. We compare the performance of two state-of-the-art SSVEP decoders on both ECoG- and scalp-recorded EEG signals, and show that ECoG-based decoding is more accurate for very short stimulation lengths (i...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30319385/pipeline-for-analyzing-lesions-after-stroke-pals
#10
Kaori L Ito, Amit Kumar, Artemis Zavaliangos-Petropulu, Steven C Cramer, Sook-Lei Liew
Lesion analyses are critical for drawing insights about stroke injury and recovery, and their importance is underscored by growing efforts to collect and combine stroke neuroimaging data across research sites. However, while there are numerous processing pipelines for neuroimaging data in general, few can be smoothly applied to stroke data due to complications analyzing the lesioned region. As researchers often use their own tools or manual methods for stroke MRI analysis, this could lead to greater errors and difficulty replicating findings over time and across sites...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30319384/a-segmentation-scheme-for-complex-neuronal-arbors-and-application-to-vibration-sensitive-neurons-in-the-honeybee-brain
#11
Hidetoshi Ikeno, Ajayrama Kumaraswamy, Kazuki Kai, Thomas Wachtler, Hiroyuki Ai
The morphology of a neuron is strongly related to its physiological properties, application of logical product and thus to information processing functions. Optical microscope images are widely used for extracting the structure of neurons. Although several approaches have been proposed to trace and extract complex neuronal structures from microscopy images, available methods remain prone to errors. In this study, we present a practical scheme for processing confocal microscope images and reconstructing neuronal structures...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30294269/accurate-reconstruction-of-image-stimuli-from-human-functional-magnetic-resonance-imaging-based-on-the-decoding-model-with-capsule-network-architecture
#12
Kai Qiao, Chi Zhang, Linyuan Wang, Jian Chen, Lei Zeng, Li Tong, Bin Yan
In neuroscience, all kinds of computation models were designed to answer the open question of how sensory stimuli are encoded by neurons and conversely, how sensory stimuli can be decoded from neuronal activities. Especially, functional Magnetic Resonance Imaging (fMRI) studies have made many great achievements with the rapid development of deep network computation. However, comparing with the goal of decoding orientation, position and object category from human fMRI in visual cortex, accurate reconstruction of image stimuli is a still challenging work...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30258358/learning-brain-connectivity-sub-networks-by-group-constrained-sparse-inverse-covariance-estimation-for-alzheimer-s-disease-classification
#13
Yang Li, Jingyu Liu, Jie Huang, Zuoyong Li, Peipeng Liang
Background/Aims: Brain functional connectivity networks constructed from resting-state functional magnetic resonance imaging (rs-fMRI) have been widely used for classifying Alzheimer's disease (AD) from normal controls (NC). However, conventional correlation analysis methods only capture the pairwise information, which may not be capable of revealing an adequate and accurate functional connectivity relationship among brain regions in the whole brain. Additionally, the non-sparse connectivity networks commonly contain a large number of spurious or insignificant connections, which are inconsistent with the sparse connectivity of actual brain networks in nature and may deteriorate the classification performance of Alzheimer's disease...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30245623/analysis-of-alzheimer-s-disease-based-on-the-random-neural-network-cluster-in-fmri
#14
Xia-An Bi, Qin Jiang, Qi Sun, Qing Shu, Yingchao Liu
As Alzheimer's disease (AD) is featured with degeneration and irreversibility, the diagnosis of AD at early stage is important. In recent years, some researchers have tried to apply neural network (NN) to classify AD patients from healthy controls (HC) based on functional MRI (fMRI) data. But most study focus on a single NN and the classification accuracy was not high. Therefore, this paper used the random neural network cluster which was composed of multiple NNs to improve classification performance. Sixty one subjects (25 AD and 36 HC) were acquired from the Alzheimer's Disease Neuroimaging Initiative (ADNI) dataset...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30245622/angular-upsampling-in-infant-diffusion-mri-using-neighborhood-matching-in-x-q-space
#15
Geng Chen, Bin Dong, Yong Zhang, Weili Lin, Dinggang Shen, Pew-Thian Yap
Diffusion MRI requires sufficient coverage of the diffusion wavevector space, also known as the q -space, to adequately capture the pattern of water diffusion in various directions and scales. As a result, the acquisition time can be prohibitive for individuals who are unable to stay still in the scanner for an extensive period of time, such as infants. To address this problem, in this paper we harness non-local self-similar information in the x - q space of diffusion MRI data for q -space upsampling. Specifically, we first perform neighborhood matching to establish the relationships of signals in x - q space...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30233348/brant-a-versatile-and-extendable-resting-state-fmri-toolkit
#16
Kaibin Xu, Yong Liu, Yafeng Zhan, Jiaji Ren, Tianzi Jiang
Data processing toolboxes for resting-state functional MRI (rs-fMRI) have provided us with a variety of functions and user friendly graphic user interfaces (GUIs). However, many toolboxes only cover a certain range of functions, and use exclusively designed GUIs. To facilitate data processing and alleviate the burden of manually drawing GUIs, we have developed a versatile and extendable MATLAB-based toolbox, BRANT (BRAinNetome fmri Toolkit), with a wide range of rs-fMRI data processing functions and code-generated GUIs...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30210327/decentralized-analysis-of-brain-imaging-data-voxel-based-morphometry-and-dynamic-functional-network-connectivity
#17
Harshvardhan Gazula, Bradley T Baker, Eswar Damaraju, Sergey M Plis, Sandeep R Panta, Rogers F Silva, Vince D Calhoun
In the field of neuroimaging, there is a growing interest in developing collaborative frameworks that enable researchers to address challenging questions about the human brain by leveraging data across multiple sites all over the world. Additionally, efforts are also being directed at developing algorithms that enable collaborative analysis and feature learning from multiple sites without requiring the often large data to be centrally located. In this paper, we propose two new decentralized algorithms: (1) A decentralized regression algorithm for performing a voxel-based morphometry analysis on structural magnetic resonance imaging (MRI) data and, (2) A decentralized dynamic functional network connectivity algorithm which includes decentralized group ICA and sliding-window analysis of functional MRI data...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30197593/neuroscience-information-toolbox-an-open-source-toolbox-for-eeg-fmri-multimodal-fusion-analysis
#18
Li Dong, Cheng Luo, Xiaobo Liu, Sisi Jiang, Fali Li, Hongshuo Feng, Jianfu Li, Diankun Gong, Dezhong Yao
Recently, scalp electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) multimodal fusion has been pursued in an effort to study human brain function and dysfunction to obtain more comprehensive information on brain activity in which the spatial and temporal resolutions are both satisfactory. However, a more flexible and easy-to-use toolbox for EEG-fMRI multimodal fusion is still lacking. In this study, we therefore developed a freely available and open-source MATLAB graphical user interface toolbox, known as the Neuroscience Information Toolbox (NIT), for EEG-fMRI multimodal fusion analysis...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30186131/intra-and-inter-scanner-reliability-of-voxel-wise-whole-brain-analytic-metrics-for-resting-state-fmri
#19
Na Zhao, Li-Xia Yuan, Xi-Ze Jia, Xu-Feng Zhou, Xin-Ping Deng, Hong-Jian He, Jianhui Zhong, Jue Wang, Yu-Feng Zang
As the multi-center studies with resting-state functional magnetic resonance imaging (RS-fMRI) have been more and more applied to neuropsychiatric studies, both intra- and inter-scanner reliability of RS-fMRI are becoming increasingly important. The amplitude of low frequency fluctuation (ALFF), regional homogeneity (ReHo), and degree centrality (DC) are 3 main RS-fMRI metrics in a way of voxel-wise whole-brain (VWWB) analysis. Although the intra-scanner reliability (i.e., test-retest reliability) of these metrics has been widely investigated, few studies has investigated their inter-scanner reliability...
2018: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/30158864/sparse-ordinal-logistic-regression-and-its-application-to-brain-decoding
#20
Emi Satake, Kei Majima, Shuntaro C Aoki, Yukiyasu Kamitani
Brain decoding with multivariate classification and regression has provided a powerful framework for characterizing information encoded in population neural activity. Classification and regression models are respectively used to predict discrete and continuous variables of interest. However, cognitive and behavioral parameters that we wish to decode are often ordinal variables whose values are discrete but ordered, such as subjective ratings. To date, there is no established method of predicting ordinal variables in brain decoding...
2018: Frontiers in Neuroinformatics
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