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Hemodynamic changes during posterior epilepsies: An EEG-fNIRS study
2014
Epilepsy Research
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Spikes and seizures were carefully marked on EEG traces, and convolved with a standard hemodynamic response function for general linear model (GLM) analysis. ...
GLM results for seizures (in 3 patients) and spikes (7 patients) were broadly sensitive to the epileptic focus in 7/9 patients, and specific in 5/9 patients with fNIRS deoxyhemoglobin responses lateralized ...
Nonlinear hemodynamic responses in human epilepsy: a multimodal analysis with fNIRS-EEG and fMRI-EEG. J. Neurosci. Methods 204, 326-340. ...
doi:10.1016/j.eplepsyres.2014.03.007
pmid:24755234
fatcat:s3qa35jrefdwbmfrj6dxj67leu
fNIRS-EEG study of focal interictal epileptiform discharges
2014
Epilepsy Research
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Simultaneous EEG-fNIRS recording allows the spatio-temporal reconstruction of the hemodynamic response in terms of the concentration changes in oxyhemoglobin (HbO) and deoxy-hemoglobin (HbR) associated ...
Functional near-infrared spectroscopy (fNIRS) acquired with electroencephalography (EEG) is a relatively new non-invasive neuroimaging technique with potential for long term monitoring of the epileptic ...
Acknowledgements This work was supported by the Fonds de Recherche en Santé du Québec (FRSQ) grant 14385, the Canadian Institutes of Health Research (CIHR), Institute of Circulatory and Respiratory Health ...
doi:10.1016/j.eplepsyres.2013.12.011
pmid:24439212
fatcat:5qfcqicio5f6np3t7hyzyxqtxm
Multichannel continuous electroencephalography-functional near-infrared spectroscopy recording of focal seizures and interictal epileptiform discharges in human epilepsy: a review
2016
Neurophotonics
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specificity of fNIRS to localize the epileptic focus can be estimated in a sample of 40 patients. ...
Recent work by our group and others has revealed the potential of fNIRS, combined with electroencephalography (EEG), in the context of human epilepsy. ...
Their analysis may prove useful in identifying epileptic foci or their networks. 60,61 In Ref. 41 , two analysis methods based on the GLM were used to process fNIRS data related to IEDs: a Bayesian general ...
doi:10.1117/1.nph.3.3.031402
pmid:26958576
pmcid:PMC4750425
fatcat:6dnqsaj2hjfz5k73ii4bnrkcsm
Determination of epileptic focus side in mesial temporal lobe epilepsy using long-term noninvasive fNIRS/EEG monitoring for presurgical evaluation
2015
Neurophotonics
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Here, we applied long-term simultaneous functional near-infrared spectroscopy (fNIRS)/electroencephalogram (EEG) monitoring for focus diagnosis in patients with mesial temporal lobe epilepsy (MTLE). ...
The true laterality was determined based on the relief of seizures by selective amygdalo-hippocampectomy. Thus, oxy-Hb amplitude could be a reliable measure for determining the epileptic focus side. ...
This work was supported in part by the Grant-in-Aid for Scientific Research from the Japan Society for Promotion of Science (25282243 to I. D. and 23390354 to E. W.). ...
doi:10.1117/1.nph.2.2.025003
pmid:26158007
pmcid:PMC4478938
fatcat:g466j6dacnco7iuciz3rwsw6oa
Hemodynamic Response to Interictal Epileptiform Discharges Addressed by Personalized EEG-fNIRS Recordings
2016
Frontiers in Neuroscience
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Objective: We aimed at studying the hemodynamic response (HR) to Interictal Epileptic Discharges (IEDs) using patient-specific and prolonged simultaneous ElectroEncephaloGraphy (EEG) and functional Near ...
Optodes were glued using collodion to achieve prolonged acquisition with high quality signal. fNIRS data analysis was handled with no a priori constraint on HR time course, averaging fNIRS signals to similar ...
ACKNOWLEDGMENTS We acknowledge the precious help of Dr. F. Dubeau and the EEG technicians N. Drouin, L. Allard, and F. Ziane for collodion installation of EEG electrodes and fNIRS optodes. ...
doi:10.3389/fnins.2016.00102
pmid:27047325
pmcid:PMC4801878
fatcat:romuoriir5cibiz7e76ppue34a
Simultaneous functional near-infrared spectroscopy and electroencephalography for monitoring of human brain activity and oxygenation: a review
2017
Neurophotonics
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Multimodal monitoring has become particularly common in the study of human brain function. ...
not suited for other neuroimaging modalities, such as functional magnetic resonance imaging, positron emission tomography, and magnetoencephalography. fNIRS-EEG brain monitoring settles itself as a useful ...
Acknowledgments This study was partially funded by grant: H2020, ECSEL-04-2015-Smart Health, Advancing Smart Optical Imaging and Sensing for Health (ASTONISH). ...
doi:10.1117/1.nph.4.4.041411
pmid:28840162
pmcid:PMC5566595
fatcat:yv7egdz3oreqzh3kpnomoxgqou
fNIRS improves seizure detection in multimodal EEG-fNIRS recordings
2019
Journal of Biomedical Optics
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After validating our network using EEG, fNIRS, and multimodal data comprising a corpus of 89 seizures from 40 refractory epileptic patients was used as model input to evaluate the integration of fNIRS ...
Employing multimodal neuroimaging, particularly EEG-fNIRS, in epileptic patients, can enhance seizure detection performance. ...
). fNIRS depends on the slow dynamics of the hemodynamic response, thereby yielding lower temporal resolution. ...
doi:10.1117/1.jbo.24.5.051408
pmid:30734544
pmcid:PMC6992892
fatcat:sirftgoxxvfnfghvt6zm36ikda
Biosensors for Epilepsy Management: State-of-Art and Future Aspects
2019
Sensors
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Epilepsy is a serious neurological disorder which affects every aspect of patients' life, including added socio-economic burden. ...
This review will serve as a guide platform to scholars for understanding and planning of future research aiming to develop a smart bio-sensing system to detect and monitor epilepsy for point-of-care (PoC ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/s19071525
fatcat:h5ils42mkvg33bw4fbg2i35tt4
Functional Near-Infrared Spectroscopy and Its Clinical Application in the Field of Neuroscience: Advances and Future Directions
2020
Frontiers in Neuroscience
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to improve the sensitivity of fNIRS and increase its use as a wide-spread clinical tool for the robust assessment of brain function. ...
Oligochannel fNIRS is adequate for estimating global cerebral function and it has become an important tool in the critical care setting for evaluating cerebral oxygenation and autoregulation in patients ...
AUTHOR CONTRIBUTIONS All authors contributed extensively to the work presented in this manuscript. W-LC and JW wrote the first draft of the manuscript. ...
doi:10.3389/fnins.2020.00724
pmid:32742257
pmcid:PMC7364176
fatcat:5viowfaqangnlgljildbio7uam
What Triggers the Interictal Epileptic Spike? A Multimodal Multiscale Analysis of the Dynamic of Synaptic and Non-synaptic Neuronal and Vascular Compartments Using Electrical and Optical Measurements
2021
Frontiers in Neurology
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Finally, changes in light scattering before the epileptic spikes suggest a change in membrane configuration before the IIS. ...
(3) the synaptic mechanisms (coherence and synchronization), and (4) non-synaptic mechanisms that take place in the neuronal network around the time of the IISs in a very specific cerebral hemodynamic ...
However, several studies have demonstrated hemodynamic changes [oxyhemoglobin (HbO 2 ) and deoxyhemoglobin (HbR)] prior to epileptic spikes (5-6 s) in animals using fNIRS (20, 21) and in humans using ...
doi:10.3389/fneur.2021.596926
pmid:33643187
pmcid:PMC7907164
fatcat:2nvc26mcybdmvacfqnxdewrcyu
Optimal optode montage on electroencephalography/functional near-infrared spectroscopy caps dedicated to study epileptic discharges
2014
Journal of Biomedical Optics
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Functional near-infrared spectroscopy (fNIRS), acquired simultaneously with electroencephalography (EEG), allows the investigation of hemodynamic brain responses to epileptic activity. ...
We present a method for computing an optimal SD montage on an EEG/fNIRS cap that focuses on one or several specific brain regions; the montage maximizes the spatial sensitivity. ...
His research aims at investigating the integration of multimodal functional data to study brain mechanisms during epileptic discharges. ...
doi:10.1117/1.jbo.19.2.026010
pmid:24525860
fatcat:ckmcoysflzczjacdx2hriqixh4
Systemic Review on Transcranial Electrical Stimulation Parameters and EEG/fNIRS Features for Brain Diseases
2021
Frontiers in Neuroscience
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in a single session (36.8%). ...
The frontal cortex (46.4%) and the cerebral cortex (47.8%) were used as a neuroimaging modality, with the power spectrum (45.7%) commonly extracted as a quantitative EEG feature. ...
As shown in Figure 4B , EEG was used in most tES studies as the neuroimaging method. A few studies utilized fNIRS to measure hemodynamic activity after the intervention. ...
doi:10.3389/fnins.2021.629323
pmid:33841079
pmcid:PMC8032955
fatcat:5grwf7r6obfvxi6vkjhonowbs4
Optics Based Label-Free Techniques and Applications in Brain Monitoring
2020
Applied Sciences
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In addition, other optical techniques are currently developed for in vivo imaging and in the near future can be potentially used more in human brain research. ...
Functional near-infrared spectroscopy (fNIRS) has been utilized already around three decades for monitoring the brain, in particular, oxygenation changes in the cerebral cortex. ...
A similar study was conducted by Pouliot et al. [71] , who used fNIRS-EEG to quantify nonlinear hemodynamic responses of human refractory focal epilepsy. ...
doi:10.3390/app10062196
fatcat:5gj65eif35fhzk5zpy6f6plhvy
Pre-seizure state identified by diffuse optical tomography
2014
Scientific Reports
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For patients without complete seizure control, the sudden, unforeseen occurrence represents one of the most debilitating aspects of epilepsy. ...
Here we demonstrate using a rat model of generalized epilepsy that diffuse optical tomography (DOT) provides a unique functional neuroimaging modality for noninvasively and continuously tracking such brain ...
Acknowledgments This research was supported in part by an NIH grant (R01 NS069848), the J. Crayton Pruitt Family and the B.J. and Eve Wilder endowment funds. www.nature.com/scientificreports ...
doi:10.1038/srep03798
pmid:24445927
pmcid:PMC3896905
fatcat:lez7tqf4afgnpoddyu64wqwfdi
ADVANCES IN FUNCTIONAL BRAIN IMAGING: A COMPREHENSIVE SURVEY FOR ENGINEERS AND PHYSICAL SCIENTISTS
2016
International Journal of Advanced Research
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To detect an epileptic spike, in MEG, 3-4 cm 2 of synchronized cortical epileptic activity is required, whereas at least 6-20 cm 2 needed in scalp EEG spike detection. ...
(b) (d) (c) (a) 657 Co-Registered fMRI and fNIRS:-Although both fMRI and fNIRS target the hemodynamic response, they are based on different physics principles and possess unique advantages. ...
doi:10.21474/ijar01/1259
fatcat:fgslra5dc5h2rmmlvmkoaoy6de
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