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https://www.readbyqxmd.com/read/28324954/hardware-friendly-seizure-detection-with-a-boosted-ensemble-of-shallow-decision-trees
#1
Mahsa Shoaran, Masoud Farivar, Azita Emami
Efficient on-chip learning is becoming an essential element of implantable biomedical devices. Despite a substantial literature on automated seizure detection algorithms, hardware-friendly implementation of such techniques is not sufficiently addressed. In this paper, we propose to employ a gradientboosted ensemble of decision trees to achieve a reasonable trade-off between detection accuracy and implementation cost. Combined with the proposed feature extraction model, we show that these classifiers quickly become competitive with more complex learning models previously proposed for hardware implementation, with only a small number of low-depth (d <; 4) "shallow" trees...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28291867/development-and-validation-of-a-brain-phantom-for-therapeutic-cooling-devices
#2
Ryan D M Packett, Philip Brown, Gautam S S Popli, F Scott Gayzik
Tissue cooling is a viable therapy for multiple conditions and injuries, and has been applied to the brain to treat epilepsy and concussions, leading to improved long-term outcomes. To facilitate the study of temperature reduction as a function of various cooling methods, a thermal brain phantom was developed and analyzed. The phantom is composed of a potassium-neutralized, superabsorbent co-polymer hydrogel. The phantom was tested in a series of cooling trials using a cooling block and 37 deg. water representing non-directional blood flow ranging up to 6 GPH, a physiologically representative range based on the prototype volume...
March 14, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28268493/automatic-seizure-detection-using-correlation-integral-with-nonlinear-adaptive-denoising-and-kalman-filter
#3
Hongda Wang, Chiu-Sing Choy
The ability of correlation integral for automatic seizure detection using scalp EEG data has been re-examined in this paper. To facilitate the detection performance and overcome the shortcoming of correlation integral, nonlinear adaptive denoising and Kalman filter have been adopted for pre-processing and post-processing. The three-stage algorithm has achieved 84.6% sensitivity and 0.087/h false detection rate, which are comparable to many machine learning based methods, but at much lower computational cost...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28251589/neurostimulation-devices-used-in-treatment-of-epilepsy
#4
REVIEW
Evren Burakgazi Dalkilic
Epilepsy is a chronic neurological disorder frequently requiring lifelong treatment. In 70% of epilepsy patients, seizures are well controlled by antiepileptic medications. About 30% of epilepsy patients remain refractory to medical treatments and may need surgical interventions for better seizure control. Unfortunately and not infrequently, surgical intervention is not feasible due to various reasons such as multiple seizure foci, not resectable focus because of eloquent cortex location, or inability to tolerate surgery due to ongoing concomitant medical conditions...
February 2017: Current Treatment Options in Neurology
https://www.readbyqxmd.com/read/28242084/understanding-death-in-children-with-epilepsy
#5
REVIEW
Elizabeth J Donner, Peter Camfield, Linda Brooks, Jeffrey Buchhalter, Carol Camfield, Tobias Loddenkemper, Elaine Wirrell
Death in children with epilepsy is profoundly disturbing, with lasting effects on the family, community, and health care providers. The overall risk of death for children with epilepsy is about ten times that of the general population. However, the risk of premature death for children without associated neurological comorbidities is similar to that of the general population, and most deaths are related to the cause of the epilepsy or associated neurologic disability, not seizures. The most common cause of seizure-related death in children with epilepsy is sudden unexpected death in epilepsy (SUDEP)...
January 31, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28237319/epilepsy-treatment-in-adults-and-adolescents-expert-opinion-2016
#6
REVIEW
Jerry J Shih, Julia B Whitlock, Nicole Chimato, Emily Vargas, Steven C Karceski, Ryan D Frank
INTRODUCTION: There are over twenty anti-seizure medications and anti-seizure devices available commercially in the United States. The multitude of treatment options for seizures can present a challenge to clinicians, especially those who are not subspecialists in the epilepsy field. Many clinical questions are not adequately answered in double-blind randomized controlled studies. In the presence of a knowledge gap, many clinicians consult a respected colleague with acknowledged expertise in the field...
February 22, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28226868/hardware-friendly-seizure-detection-with-a-boosted-ensemble-of-shallow-decision-trees
#7
Mahsa Shoaran, Masoud Farivar, Azita Emami, Mahsa Shoaran, Masoud Farivar, Azita Emami, Masoud Farivar, Azita Emami, Mahsa Shoaran
Efficient on-chip learning is becoming an essential element of implantable biomedical devices. Despite a substantial literature on automated seizure detection algorithms, hardware-friendly implementation of such techniques is not sufficiently addressed. In this paper, we propose to employ a gradientboosted ensemble of decision trees to achieve a reasonable trade-off between detection accuracy and implementation cost. Combined with the proposed feature extraction model, we show that these classifiers quickly become competitive with more complex learning models previously proposed for hardware implementation, with only a small number of low-depth (d <; 4) "shallow" trees...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226667/automatic-seizure-detection-using-correlation-integral-with-nonlinear-adaptive-denoising-and-kalman-filter
#8
Hongda Wang, Chiu-Sing Choy, Hongda Wang, Chiu-Sing Choy, Hongda Wang, Chiu-Sing Choy
The ability of correlation integral for automatic seizure detection using scalp EEG data has been re-examined in this paper. To facilitate the detection performance and overcome the shortcoming of correlation integral, nonlinear adaptive denoising and Kalman filter have been adopted for pre-processing and post-processing. The three-stage algorithm has achieved 84.6% sensitivity and 0.087/h false detection rate, which are comparable to many machine learning based methods, but at much lower computational cost...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225164/effects-of-focal-brain-cooling-on-extracellular-concentrations-of-neurotransmitters-in-patients-with-epilepsy
#9
Sadahiro Nomura, Takao Inoue, Hirochika Imoto, Eiichi Suehiro, Yuichi Maruta, Yuya Hirayama, Michiyasu Suzuki
OBJECTIVE: Brain hypothermia controls epileptic discharge and reduces extracellular concentrations of glutamate (Glu), an excitatory neurotransmitter. We aimed to determine the effects of focal brain cooling (FBC) on levels of γ-aminobutyric acid (GABA), which is a major inhibitory neurotransmitter. The relationship between Glu or GABA concentrations and the severity of epileptic symptoms was also analyzed. METHODS: Patients with intractable epilepsy underwent FBC at lesionectomized (n = 11) or hippocampectomized (n = 8) regions at 15°C for 30 min using custom-made cooling devices...
February 22, 2017: Epilepsia
https://www.readbyqxmd.com/read/28185967/intraoperative-ct-and-nexframe-guided-placement-of-bilateral-hippocampal-based-responsive-neurostimulation-a-technical-note
#10
Kunal Gupta, Jeffrey S Raskin, Ahmed M Raslan
INTRODUCTION: Surgical resection of a lesion that correlates with seizure onset in patients with epilepsy can dramatically improve seizure burden and quality of life. For bilateral hippocampal lesions, bilateral resection comes with a risk of severe cognitive deficits. Responsive neurostimulation (RNS) devices offers a new modality to treat multifocal lesions in a reversible manner, including bilateral hippocampal stimulation. We describe technical aspects of Nexframe-assisted placement of bilateral NeuroPace mesial temporal electrodes, and case examples...
February 6, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28160877/management-of-adult-onset-seizures
#11
REVIEW
Amy Z Crepeau, Joseph I Sirven
Epilepsy is a common yet heterogeneous disease. As a result, management often requires complex decision making. The ultimate goal of seizure management is for the patient to have no seizures and no considerable adverse effects from the treatment. Antiepileptic drugs are the mainstay of therapy, with more than 20 medications currently approved in the United States. Antiepileptic drug selection requires an understanding of the patient's epilepsy, along with consideration of comorbidities and potential for adverse events...
February 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28152451/can-natural-ways-to-stimulate-the-vagus-nerve-improve-seizure-control
#12
REVIEW
Alan W C Yuen, Josemir W Sander
The vagus nerve (VN) is the longest cranial nerve, innervating the neck, thorax and abdomen, with afferent fibers transmitting a range of interoceptive stimuli and efferent fibres to somatic structures and autonomic preganglions. Over the last few decades, electrical stimulation of the VN using implanted devices (VNS) has been developed leading to its approval for the treatment of epilepsy and depression. More recently, non-invasive devices to stimulation the VN have been developed. The VN has many functions and the activity that is most amenable to assessment is its effect in controlling the cardiac rhythm...
February 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28122902/predictors-of-unintended-pregnancy-in-women-with-epilepsy
#13
Andrew G Herzog, Hannah B Mandle, Kaitlyn E Cahill, Kristen M Fowler, W Allen Hauser
OBJECTIVE: To determine whether rates of unintended pregnancy in women with epilepsy (WWE) vary by contraceptive category and when stratified by antiepileptic drug (AED) category. METHODS: These retrospective data come from the Epilepsy Birth Control Registry (EBCR) web-based survey of 1,144 WWE in the community, 18-47 years of age, who provided demographic, epilepsy, AED, contraceptive, and pregnancy data. Participants indicated whether pregnancies were intended or unintended, as well as the type of contraceptive and AED used at conception...
January 25, 2017: Neurology
https://www.readbyqxmd.com/read/28120052/vagal-nerve-stimulation-for-drug-resistant-epilepsy-adverse-events-and-outcome-in-a-series-of-patients-with-long-term-follow-up
#14
R Morace, G Di Gennaro, P P Quarato, A D'Aniello, A Mascia, L Grammaldo, M De Risi, A Sparano, F Di Cola, M De Angelis, V Esposito
BACKGROUND: Vagal nerve stimulation (VNS) is a palliative treatment option for drug-resistant epilepsy. The aim of this study was to describe the clinical and demographic features of selected patients scheduled for VNS and to evaluate the long-term efficacy of VNS in seizure control. MATERIALS AND METHODS: Between 2006 and 2013, 32 consecutive epileptic patients (14 male and 18 female) were enrolled at our Institute for VNS implantation. In all cases resective surgery had previously been excluded by the use of a noninvasive presurgical study protocol...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/28111749/progress-report-on-new-antiepileptic-drugs-a-summary-of-the-thirteenth-eilat-conference-on-new-antiepileptic-drugs-and-devices-eilat-xiii
#15
REVIEW
Meir Bialer, Svein I Johannessen, René H Levy, Emilio Perucca, Torbjörn Tomson, H Steve White
The Thirteenth Eilat Conference on New Antiepileptic Drugs and Devices (EILAT XIII) took place in Madrid, Spain, on June 26-29, 2016, and was attended by >200 delegates from 31 countries. The present Progress Report provides an update on experimental and clinical results for drugs presented at the Conference. Compounds for which summary data are presented include an AED approved in 2016 (brivaracetam), 12 drugs in phase I-III clinical development (adenosine, allopregnanolone, bumetanide, cannabidiol, cannabidivarin, 2-deoxy-d-glucose, everolimus, fenfluramine, huperzine A, minocycline, SAGE-217, and valnoctamide) and 6 compounds or classes of compounds for which only preclinical data are available (bumetanide derivatives, sec-butylpropylacetamide, FV-082, 1OP-2198, NAX 810-2, and SAGE-689)...
January 23, 2017: Epilepsia
https://www.readbyqxmd.com/read/28050973/behavioral-state-classification-in-epileptic-brain-using-intracranial-electrophysiology
#16
Vaclav Kremen, Juliano J Duque, Benjamin H Brinkmann, Brent M Berry, Michal T Kucewicz, Fatemeh Khadjevand, Jamie Van Gompel, Matt Stead, Erik K St Louis, Gregory A Worrell
OBJECTIVE: Automated behavioral state classification can benefit next generation implantable epilepsy devices. In this study we explored the feasibility of automated awake (AW) and slow wave sleep (SWS) classification using wide bandwidth intracranial EEG (iEEG) in patients undergoing evaluation for epilepsy surgery. APPROACH: Data from seven patients (age [Formula: see text], 4 women) who underwent intracranial depth electrode implantation for iEEG monitoring were included...
April 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/27965623/transcranial-alternating-current-stimulation-a-potential-risk-for-genetic-generalized-epilepsy-patients-study-case
#17
Daniel San-Juan, Carlos Ignacio Sarmiento, Axel Hernandez-Ruiz, Ernesto Elizondo-Zepeda, Gabriel Santos-Vázquez, Gerardo Reyes-Acevedo, Héctor Zúñiga-Gazcón, Carol Marina Zamora-Jarquín
Transcranial alternating current stimulation (tACS) is a re-emergent neuromodulation technique that consists in the external application of oscillating electrical currents that induces changes in cortical excitability. We present the case of a 16-year-old female with pharmaco-resistant juvenile myoclonic epilepsy to 3 antiepileptic's drugs characterized by 4 myoclonic and 20 absence seizures monthly. She received tACS at 1 mA at 3 Hz pulse train during 60 min over Fp1-Fp2 (10-20 EEG international system position) during 4 consecutive days using an Endeavor™ IOM Systems device(®) (Natus Medical Incorporated, Middleton, WI, USA)...
2016: Frontiers in Neurology
https://www.readbyqxmd.com/read/27926827/decoding-hand-gestures-from-primary-somatosensory-cortex-using-high-density-ecog
#18
Mariana P Branco, Zachary V Freudenburg, Erik J Aarnoutse, Martin G Bleichner, Mariska J Vansteensel, Nick F Ramsey
Electrocorticography (ECoG) based Brain-Computer Interfaces (BCIs) have been proposed as a way to restore and replace motor function or communication in severely paralyzed people. To date, most motor-based BCIs have either focused on the sensorimotor cortex as a whole or on the primary motor cortex (M1) as a source of signals for this purpose. Still, target areas for BCI are not confined to M1, and more brain regions may provide suitable BCI control signals. A logical candidate is the primary somatosensory cortex (S1), which not only shares similar somatotopic organization to M1, but also has been suggested to have a role beyond sensory feedback during movement execution...
February 15, 2017: NeuroImage
https://www.readbyqxmd.com/read/27903766/sudden-unexpected-death-in-epilepsy-measures-to-reduce-risk
#19
REVIEW
Brendan Mclean, Rohit Shankar, Jane Hanna, Caryn Jory, Craig Newman
This review looks at the strategies that may help to reduce the risk of sudden unexpected death in epilepsy beyond that of trying to achieve seizure cessation, which is not possible for up to 30% of patients with epilepsy. These strategies include seizure safety checklists, mobile phone technology, telehealth and various devices currently available or in development. We highlight interventions where there is evidence of benefit, and draw attention for the need both to involve patients with epilepsy in risk reduction and to improve communication with those at risk...
January 2017: Practical Neurology
https://www.readbyqxmd.com/read/27882910/does-nintendo-wii-balance-board-improve-standing-balance-a-randomised-controlled-trial-in-children-with-cerebral-palsy
#20
Valeska Gatica-Rojas, Guillermo Méndez-Rebolledo, Eduardo Guzman-Muñoz, Alex Soto-Poblete, Ricardo Cartes-Velásquez, Edith Elgueta-Cancino, Eduardo Cofré Lizama
BACKGROUND: Evidence on the effect of systemic exercise programs to improve the standing balance with the Nintendo Wii system is very limited and its post- treatment effectiveness is unknown in cerebral palsy (CP) patients. AIM: Primary aim was to compare the effect of Nintendo Wii balance board (Wii- therapy) and standard physiotherapy (SPT), on the performance of standing balance in children and adolescents with CP. Secondary aim was to determine the post-treatment effectiveness of Wii-therapy and SPT...
November 24, 2016: European Journal of Physical and Rehabilitation Medicine
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