Comput Methods Programs Biomed - Determination of ECoG information flow activity based on Granger causality and Hilbert transformation.

Tópicos

{ signal(2180) analysi(812) frequenc(800) }
{ activ(1138) subject(705) human(624) }
{ care(1570) inform(1187) nurs(1089) }
{ model(3480) simul(1196) paramet(876) }
{ blood(1257) pressur(1144) flow(957) }
{ state(1844) use(1261) util(961) }
{ first(2504) two(1366) second(1323) }
{ sampl(1606) size(1419) use(1276) }
{ surgeri(1148) surgic(1085) robot(1054) }
{ clinic(1479) use(1117) guidelin(835) }
{ age(1611) year(1155) adult(843) }
{ structur(1116) can(940) graph(676) }
{ method(2212) result(1239) propos(1039) }
{ featur(3375) classif(2383) classifi(1994) }
{ imag(2675) segment(2577) method(1081) }
{ perform(999) metric(946) measur(919) }
{ ehr(2073) health(1662) electron(1139) }
{ use(1733) differ(960) four(931) }
{ survey(1388) particip(1329) question(1065) }
{ inform(2794) health(2639) internet(1427) }
{ bind(1733) structur(1185) ligand(1036) }
{ network(2748) neural(1063) input(814) }
{ patient(2315) diseas(1263) diabet(1191) }
{ take(945) account(800) differ(722) }
{ motion(1329) object(1292) video(1091) }
{ error(1145) method(1030) estim(1020) }
{ data(1714) softwar(1251) tool(1186) }
{ design(1359) user(1324) use(1319) }
{ general(901) number(790) one(736) }
{ featur(1941) imag(1645) propos(1176) }
{ data(3963) clinic(1234) research(1004) }
{ research(1085) discuss(1038) issu(1018) }
{ health(3367) inform(1360) care(1135) }
{ patient(1821) servic(1111) care(1106) }
{ estim(2440) model(1874) function(577) }
{ method(1969) cluster(1462) data(1082) }
{ detect(2391) sensit(1101) algorithm(908) }
{ model(3404) distribut(989) bayesian(671) }
{ can(774) often(719) complex(702) }
{ imag(1947) propos(1133) code(1026) }
{ data(1737) use(1416) pattern(1282) }
{ system(1976) rule(880) can(841) }
{ measur(2081) correl(1212) valu(896) }
{ imag(1057) registr(996) error(939) }
{ sequenc(1873) structur(1644) protein(1328) }
{ method(1219) similar(1157) match(930) }
{ imag(2830) propos(1344) filter(1198) }
{ studi(2440) review(1878) systemat(933) }
{ assess(1506) score(1403) qualiti(1306) }
{ treatment(1704) effect(941) patient(846) }
{ framework(1458) process(801) describ(734) }
{ problem(2511) optim(1539) algorithm(950) }
{ chang(1828) time(1643) increas(1301) }
{ learn(2355) train(1041) set(1003) }
{ concept(1167) ontolog(924) domain(897) }
{ algorithm(1844) comput(1787) effici(935) }
{ extract(1171) text(1153) clinic(932) }
{ method(1557) propos(1049) approach(1037) }
{ control(1307) perform(991) simul(935) }
{ model(2220) cell(1177) simul(1124) }
{ method(984) reconstruct(947) comput(926) }
{ search(2224) databas(1162) retriev(909) }
{ case(1353) use(1143) diagnosi(1136) }
{ howev(809) still(633) remain(590) }
{ studi(1410) differ(1259) use(1210) }
{ risk(3053) factor(974) diseas(938) }
{ system(1050) medic(1026) inform(1018) }
{ import(1318) role(1303) understand(862) }
{ model(2341) predict(2261) use(1141) }
{ visual(1396) interact(850) tool(830) }
{ compound(1573) activ(1297) structur(1058) }
{ perform(1367) use(1326) method(1137) }
{ studi(1119) effect(1106) posit(819) }
{ spatial(1525) area(1432) region(1030) }
{ record(1888) medic(1808) patient(1693) }
{ monitor(1329) mobil(1314) devic(1160) }
{ research(1218) medic(880) student(794) }
{ patient(2837) hospit(1953) medic(668) }
{ model(2656) set(1616) predict(1553) }
{ data(2317) use(1299) case(1017) }
{ medic(1828) order(1363) alert(1069) }
{ cost(1906) reduc(1198) effect(832) }
{ group(2977) signific(1463) compar(1072) }
{ gene(2352) biolog(1181) express(1162) }
{ data(3008) multipl(1320) sourc(1022) }
{ intervent(3218) particip(2042) group(1664) }
{ time(1939) patient(1703) rate(768) }
{ use(2086) technolog(871) perceiv(783) }
{ can(981) present(881) function(850) }
{ analysi(2126) use(1163) compon(1037) }
{ health(1844) social(1437) communiti(874) }
{ high(1669) rate(1365) level(1280) }
{ cancer(2502) breast(956) screen(824) }
{ use(976) code(926) identifi(902) }
{ drug(1928) target(777) effect(648) }
{ result(1111) use(1088) new(759) }
{ implement(1333) system(1263) develop(1122) }
{ decis(3086) make(1611) patient(1517) }
{ process(1125) use(805) approach(778) }
{ activ(1452) weight(1219) physic(1104) }

Resumo

Analysis of directional information flow patterns among different regions of the brain is important for investigating the relation between ECoG (electrocorticographic) and mental activity. The objective is to study and evaluate the information flow activity at different frequencies in the primary motor cortex. We employed Granger causality for capturing the future state of the propagation path and direction between recording electrode sites on the cerebral cortex. A grid covered the right motor cortex completely due to its size (approx. 8 cm?8 cm) but grid area extends to the surrounding cortex areas. During the experiment, a subject was asked to imagine performing two activities: movement of the left small finger and/or movement of the tongue. The time series of the electrical brain activity was recorded during these trials using an 8?8 (0.016-300 Hz band with) ECoG platinum electrode grid, which was placed on the contralateral (right) motor cortex. For detection of information flow activity and communication frequencies among the electrodes, we have proposed a method based on following steps: (i) calculation of analytical time series such as amplitude and phase difference acquired from Hilbert transformation, (ii) selection of frequency having highest interdependence for the electrode pairs for the concerned time series over a sliding window in which we assumed time series were stationary, (iii) calculation of Granger causality values for each pair with selected frequency. The information flow (causal influence) activity and communication frequencies between the electrodes in grid were determined and shown successfully. It is supposed that information flow activity and communication frequencies between the electrodes in the grid are approximately the same for the same pattern. The successful employment of Granger causality and Hilbert transformation for the detection of the propagation path and direction of each component of ECoG among different sub-cortex areas were capable of determining the information flow (causal influence) activity and communication frequencies between the populations of neurons successfully.

Resumo Limpo

analysi direct inform flow pattern among differ region brain import investig relat ecog electrocorticograph mental activ object studi evalu inform flow activ differ frequenc primari motor cortex employ granger causal captur futur state propag path direct record electrod site cerebr cortex grid cover right motor cortex complet due size approx cm cm grid area extend surround cortex area experi subject ask imagin perform two activ movement left small finger andor movement tongu time seri electr brain activ record trial use hz band ecog platinum electrod grid place contralater right motor cortex detect inform flow activ communic frequenc among electrod propos method base follow step calcul analyt time seri amplitud phase differ acquir hilbert transform ii select frequenc highest interdepend electrod pair concern time seri slide window assum time seri stationari iii calcul granger causal valu pair select frequenc inform flow causal influenc activ communic frequenc electrod grid determin shown success suppos inform flow activ communic frequenc electrod grid approxim pattern success employ granger causal hilbert transform detect propag path direct compon ecog among differ subcortex area capabl determin inform flow causal influenc activ communic frequenc popul neuron success

Resumos Similares

Comput Methods Programs Biomed - Analysis of normal and epileptic seizure EEG signals using empirical mode decomposition. ( 0,811129408740309 )
Comput Math Methods Med - Higher-order spectrum in understanding nonlinearity in EEG rhythms. ( 0,779963069746547 )
Methods Inf Med - Long-term correlations and complexity analysis of the heart rate variability signal during sleep. Comparing normal and pathologic subjects. ( 0,779390997483078 )
J Clin Monit Comput - Impaired cerebrovascular reactivity after acute traumatic brain injury can be detected by wavelet phase coherence analysis of the intracranial and arterial blood pressure signals. ( 0,768691700578871 )
Med Biol Eng Comput - The application of Hilbert-Huang transform in the analysis of muscle fatigue during cyclic dynamic contractions. ( 0,767231153853237 )
J Med Syst - Analysis of repetitive flash stimulation frequencies and record periods to detect migraine using artificial neural network. ( 0,764535621211563 )
J Clin Monit Comput - ECG myogenic artifacts during clonic seizures: a disturbing (and interesting) finding. ( 0,75931601276961 )
Comput. Biol. Med. - Baseline characteristics of cervical auscultation signals during various head maneuvers. ( 0,751698278008181 )
Comput. Biol. Med. - Current methods in electrocardiogram characterization. ( 0,746983831305865 )
Comput. Biol. Med. - Non-uniform multivariate embedding to assess the information transfer in cardiovascular and cardiorespiratory variability series. ( 0,740854669543903 )
Comput Methods Programs Biomed - Epileptic seizure classification in EEG signals using second-order difference plot of intrinsic mode functions. ( 0,73731030639973 )
Comput Methods Programs Biomed - Linear and nonlinear analysis of normal and CAD-affected heart rate signals. ( 0,7366934629889 )
J Clin Monit Comput - Respiratory change in ECG-wave amplitude is a reliable parameter to estimate intravascular volume status. ( 0,735628672070031 )
IEEE J Biomed Health Inform - EEG activity during movement planning encodes upcoming peak speed and acceleration and improves the accuracy in predicting hand kinematics. ( 0,734873671492536 )
Methods Inf Med - Prediction of countershock success in patients using the autoregressive spectral estimation. ( 0,729240079567542 )
Comput Methods Programs Biomed - Optimal channel selection for analysis of EEG-sleep patterns of neonates. ( 0,72702308760236 )
Comput Methods Programs Biomed - Automatic moment segmentation and peak detection analysis of heart sound pattern via short-time modified Hilbert transform. ( 0,726442860808068 )
Comput Methods Programs Biomed - Averaging in vitro cardiac field potential recordings obtained with microelectrode arrays. ( 0,723938332663275 )
Med Biol Eng Comput - Directional dual-tree complex wavelet packet transforms for processing quadrature signals. ( 0,723596297437641 )
IEEE J Biomed Health Inform - Sleep and wake classification with actigraphy and respiratory effort using dynamic warping. ( 0,722997172134826 )
Comput Math Methods Med - A wavelet transform based method to determine depth of anesthesia to prevent awareness during general anesthesia. ( 0,721318312980997 )
IEEE J Biomed Health Inform - Analysis of the EMG Signal During Cyclic Movements Using Multicomponent AM-FM Decomposition. ( 0,720895961762523 )
Comput Methods Programs Biomed - Automated sleep stage identification system based on time-frequency analysis of a single EEG channel and random forest classifier. ( 0,720765954693101 )
Int J Neural Syst - Detection of driving fatigue by using noncontact EMG and ECG signals measurement system. ( 0,716276074831048 )
J Clin Monit Comput - A quantitative EEG method for detecting post clamp changes during carotid endarterectomy. ( 0,714134936274145 )
J Clin Monit Comput - Intraoperative MRI electrical noise and monitor ECG filters affect arrhythmia detection and identification. ( 0,711437652226677 )
Comput Math Methods Med - Cardiorespiratory dynamic response to mental stress: a multivariate time-frequency analysis. ( 0,710564264573117 )
Med Biol Eng Comput - Classification of surface electromyographic signals by means of multifractal singularity spectrum. ( 0,709450013723269 )
IEEE J Biomed Health Inform - Single Trial Visual Evoked Potential Extraction using Partial Least Squares-based Approach. ( 0,708756230872231 )
Methods Inf Med - Classification of sleep stages using multi-wavelet time frequency entropy and LDA. ( 0,707037551956811 )
Comput. Biol. Med. - Binary symbolic dynamics classifies heart rate variability patterns linked to autonomic modulations. ( 0,702681305384069 )
Comput Math Methods Med - An automated optimal engagement and attention detection system using electrocardiogram. ( 0,701945455911994 )
Methods Inf Med - Linear and nonlinear analysis of base lung sound in extrinsic allergic alveolitis patients in comparison to healthy subjects. ( 0,700239563590804 )
Comput Math Methods Med - Neuroelectrical correlates of trustworthiness and dominance judgments related to the observation of political candidates. ( 0,698052290508749 )
Comput Math Methods Med - Probabilistic source separation for robust fetal electrocardiography. ( 0,696639741660493 )
Comput Methods Programs Biomed - A heterogeneous coupled oscillator model for simulation of ECG signals. ( 0,695551756632694 )
Comput. Biol. Med. - Estimating cognitive workload using wavelet entropy-based features during an arithmetic task. ( 0,695352823840761 )
Med Biol Eng Comput - Discrimination of left and right leg motor imagery for brain-computer interfaces. ( 0,694147143884211 )
J Clin Monit Comput - Morphological analysis of peripheral arterial signals in Takayasu's arteritis. ( 0,692445471466316 )
J Med Syst - Design and development of a heart rate variability analyzer. ( 0,691748246063652 )
J Med Syst - Determining the appropriate amount of anesthetic gas using DWT and EMD combined with neural network. ( 0,691521638684631 )
Neural Comput - Delay differential analysis of electroencephalographic data. ( 0,690259992127785 )
Comput Methods Programs Biomed - Automatic heart sound detection in pediatric patients without electrocardiogram reference via pseudo-affine Wigner-Ville distribution and Haar wavelet lifting. ( 0,68850902052937 )
Med Biol Eng Comput - Automatic detection of motion artifacts in the ballistocardiogram measured on a modified bathroom scale. ( 0,687694864503964 )
Med Biol Eng Comput - Remote sensing of patterns of cardiac activity on an ambulatory subject using millimeter-wave interferometry and statistical methods. ( 0,685451629482122 )
Comput Math Methods Med - A novel automatic detection system for ECG arrhythmias using maximum margin clustering with immune evolutionary algorithm. ( 0,684328355269948 )
Comput Methods Programs Biomed - Like/dislike analysis using EEG: determination of most discriminative channels and frequencies. ( 0,684292664403651 )
Comput. Biol. Med. - A novel electrocardiogram parameterization algorithm and its application in myocardial infarction detection. ( 0,681929002344071 )
Med Biol Eng Comput - Cross-correlation of EEG frequency bands and heart rate variability for sleep apnoea classification. ( 0,680106364481573 )
Comput Methods Programs Biomed - Broadband noise suppression and feature identification of ECG waveforms using mathematical morphology and embedding theorem. ( 0,677919047811461 )
Comput. Biol. Med. - Analysis of heart rate variability using fuzzy measure entropy. ( 0,677877302442056 )
Int J Neural Syst - Application of higher order cumulant features for cardiac health diagnosis using ECG signals. ( 0,676688086368586 )
J Med Syst - Analysis of spike waves in epilepsy using Hilbert-Huang transform. ( 0,676353113728049 )
Int J Neural Syst - Neural correlates of mathematical problem solving. ( 0,676078468816104 )
Comput. Biol. Med. - Morphological modeling of cardiac signals based on signal decomposition. ( 0,673698287893223 )
J Med Syst - Variable threshold method for ECG R-peak detection. ( 0,67367265282665 )
Comput Math Methods Med - Transfer function analysis of respiratory and cardiac pulsations in human brain observed on dynamic magnetic resonance images. ( 0,672443884132626 )
Comput. Biol. Med. - A fixed point algorithm for extracting the atrial activity in the frequency domain. ( 0,672362912338619 )
Methods Inf Med - Robust detection of sleep apnea from Holter ECGs. Joint assessment of modulations in QRS amplitude and respiratory myogram interference. ( 0,671557620391055 )
Comput Math Methods Med - Corticomuscular coherence analysis on hand movement distinction for active rehabilitation. ( 0,670508620220871 )
Med Biol Eng Comput - Modeling the relationship between Higuchi's fractal dimension and Fourier spectra of physiological signals. ( 0,67047373999161 )
Med Biol Eng Comput - Heart rate variability and nonlinear dynamic analysis in patients with stress-induced cardiomyopathy. ( 0,669887282398496 )
Comput Methods Programs Biomed - An R-peak detection method that uses an SVD filter and a search back system. ( 0,669570959015441 )
J Biomed Inform - A general framework for time series data mining based on event analysis: application to the medical domains of electroencephalography and stabilometry. ( 0,668948988754462 )
Comput Methods Programs Biomed - Texture analysis of poly-adenylated mRNA staining following global brain ischemia and reperfusion. ( 0,668196496562093 )
IEEE J Biomed Health Inform - A low-complexity ECG feature extraction algorithm for mobile healthcare applications. ( 0,667575451571057 )
J Clin Monit Comput - Power spectral analysis of plethysmographic pulse waveform in pregnant women. ( 0,667259886689638 )
Comput Math Methods Med - Novel application of a multiscale entropy index as a sensitive tool for detecting subtle vascular abnormalities in the aged and diabetic. ( 0,666741741005636 )
Med Biol Eng Comput - Reconstruction of gastric slow wave from finger photoplethysmographic signal using radial basis function neural network. ( 0,66370651163654 )
Artif Intell Med - Comparative study of approximate entropy and sample entropy robustness to spikes. ( 0,663661430946931 )
Comput Methods Programs Biomed - QRS detection based on wavelet coefficients. ( 0,66344162482147 )
Comput. Biol. Med. - Automatic classification of infant sleep based on instantaneous frequencies in a single-channel EEG signal. ( 0,660693196785269 )
Comput. Biol. Med. - Wavelet-based denoising method for real phonocardiography signal recorded by mobile devices in noisy environment. ( 0,660568314202591 )
Int J Neural Syst - Application of empirical mode decomposition (emd) for automated detection of epilepsy using EEG signals. ( 0,660230165412173 )
J Clin Monit Comput - Reversal of neuromuscular blockade by sugammadex does not affect EEG derived indices of depth of anesthesia. ( 0,659259491444171 )
Comput. Biol. Med. - Prediction of pharmacologically induced baroreflex sensitivity from local time and frequency domain indices of R-R interval and systolic blood pressure signals obtained during deep breathing. ( 0,657765725976481 )
J Clin Monit Comput - Non-stationarity of EEG during wakefulness and anaesthesia: advantages of EEG permutation entropy monitoring. ( 0,655247378619729 )
Methods Inf Med - Auditory and Nociceptive Stimuli Responses in the Electroencephalogram. A Non-linear Measures and Time-frequency Representation Based Analysis. ( 0,65185871335028 )
Comput Methods Programs Biomed - Biomedical time series clustering based on non-negative sparse coding and probabilistic topic model. ( 0,650208153160896 )
J Med Syst - Analysis of infant cry through weighted linear prediction cepstral coefficients and Probabilistic Neural Network. ( 0,650034079067244 )
Artif Intell Med - Automatic sleep scoring: a search for an optimal combination of measures. ( 0,649646457376928 )
Methods Inf Med - Automatic heart rate normalization for accurate energy expenditure estimation. An analysis of activities of daily living and heart rate features. ( 0,647265723868896 )
Med Biol Eng Comput - Denoising performance of modified dual-tree complex wavelet transform for processing quadrature embolic Doppler signals. ( 0,645599426786661 )
J Telemed Telecare - ECG telemonitoring during home-based cardiac rehabilitation in heart failure patients. ( 0,644875463708326 )
Med Biol Eng Comput - Characteristics of the swallowing sounds recorded in the ear, nose and on trachea. ( 0,643185089415868 )
IEEE J Biomed Health Inform - Quality of the wireless electrocardiogram signal during physical exercise in different age groups. ( 0,641886266624903 )
Comput Methods Programs Biomed - Epileptic seizure detection in EEGs signals using a fast weighted horizontal visibility algorithm. ( 0,639260319586599 )
Comput Methods Programs Biomed - Feature extraction of the first difference of EMG time series for EMG pattern recognition. ( 0,638601123465928 )
IEEE J Biomed Health Inform - Model based Estimation of Aortic and Mitral valves Opening and Closing Timings in Developing Human Fetuses. ( 0,637527660296257 )
Med Biol Eng Comput - Peculiarities of extracellular potentials produced by deep muscles. Part 2: motor unit potentials. ( 0,637162036359299 )
J Med Syst - Multi-feature characterization of epileptic activity for construction of an automated internet-based annotated classification. ( 0,635600759709704 )
J Med Syst - Diagnosis of epilepsy from electroencephalography signals using multilayer perceptron and Elman Artificial Neural Networks and Wavelet Transform. ( 0,635331737455432 )
Comput Math Methods Med - Fetal ECG extraction from abdominal signals: a review on suppression of fundamental power line interference component and its harmonics. ( 0,635036591736601 )
Med Biol Eng Comput - A technique based on laser Doppler flowmetry and photoplethysmography for simultaneously monitoring blood flow at different tissue depths. ( 0,635013582532374 )
J Med Syst - Classification of arrhythmia using hybrid networks. ( 0,634985085693348 )
Comput. Biol. Med. - Characteristic time scales of electroencephalograms of narcoleptic patients and healthy controls. ( 0,633241256225448 )
Int J Comput Assist Radiol Surg - Automated palpation for breast tissue discrimination based on viscoelastic biomechanical properties. ( 0,632057459126242 )
Comput Math Methods Med - Analyzing EEG of quasi-brain-death based on dynamic sample entropy measures. ( 0,631915955300508 )
Med Biol Eng Comput - Voiceless Arabic vowels recognition using facial EMG. ( 0,631831303490118 )
J Clin Monit Comput - Multi-scale sample entropy of electroencephalography during sevoflurane anesthesia. ( 0,631587617326142 )