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Hemodynamic changes during posterior epilepsies: An EEG-fNIRS study

Philippe Pouliot, Thi Phuoc Yen Tran, Véronica Birca, Phetsamone Vannasing, Julie Tremblay, Maryse Lassonde, Dang Khoa Nguyen
2014 Epilepsy Research  
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

Ke Peng, Dang Khoa Nguyen, Tania Tayah, Phetsamone Vannasing, Julie Tremblay, Mohamad Sawan, Maryse Lassonde, Frédéric Lesage, Philippe Pouliot
2014 Epilepsy Research  
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

Ke Peng, Philippe Pouliot, Frédéric Lesage, Dang Khoa Nguyen
2016 Neurophotonics  
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

Edmi Edison Rizki, Minako Uga, Ippeita Dan, Haruka Dan, Daisuke Tsuzuki, Hidenori Yokota, Keiji Oguro, Eiju Watanabe
2015 Neurophotonics  
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

Giovanni Pellegrino, Alexis Machado, Nicolas von Ellenrieder, Satsuki Watanabe, Jeffery A. Hall, Jean-Marc Lina, Eliane Kobayashi, Christophe Grova
2016 Frontiers in Neuroscience  
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

Antonio M. Chiarelli, Filippo Zappasodi, Francesco Di Pompeo, Arcangelo Merla
2017 Neurophotonics  
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

Parikshat Sirpal, Ali Kassab, Philippe Pouliot, Dang Khoa Nguyen
2019 Journal of Biomedical Optics  
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

Shivani Tiwari, Varsha Sharma, Mubarak Mujawar, Yogendra Kumar Mishra, Ajeet Kaushik, Anujit Ghosal
2019 Sensors  
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

Wei-Liang Chen, Julie Wagner, Nicholas Heugel, Jeffrey Sugar, Yu-Wen Lee, Lisa Conant, Marsha Malloy, Joseph Heffernan, Brendan Quirk, Anthony Zinos, Scott A. Beardsley, Robert Prost (+1 others)
2020 Frontiers in Neuroscience  
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

Cristian Arnal-Real, Mahdi Mahmoudzadeh, Mana Manoochehri, Mina Nourhashemi, Fabrice Wallois
2021 Frontiers in Neurology  
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

Alexis Machado, Odile Marcotte, Jean Marc Lina, Eliane Kobayashi, Christophe Grova
2014 Journal of Biomedical Optics  
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

Dalin Yang, Yong-Il Shin, Keum-Shik Hong
2021 Frontiers in Neuroscience  
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

Priya Karthikeyan, Sadegh Moradi, Hany Ferdinando, Zuomin Zhao, Teemu Myllylä
2020 Applied Sciences  
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

Tao Zhang, Junli Zhou, Ruixin Jiang, Hao Yang, Paul R. Carney, Huabei Jiang
2014 Scientific Reports  
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

Saman Sarraf, Jian Sun
2016 International Journal of Advanced Research  
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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