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https://www.readbyqxmd.com/read/29147661/an-eeg-tool-for-monitoring-patient-engagement-during-stroke-rehabilitation-a-feasibility-study
#1
Gadi Bartur, Katherin Joubran, Sara Peleg-Shani, Jean-Jacques Vatine, Goded Shahaf
Objective: Patient engagement is of major significance in neural rehabilitation. We developed a real-time EEG marker for attention, the Brain Engagement Index (BEI). In this work we investigate the relation between the BEI and temporary functional change during a rehabilitation session. Methods: First part: 13 unimpaired controls underwent BEI monitoring during motor exercise of varying levels of difficulty. Second part: 18 subacute stroke patients underwent standard motor rehabilitation with and without use of real-time BEI feedback regarding their level of engagement...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29147145/long-range-temporal-correlations-of-broadband-eeg-oscillations-for-depressed-subjects-following-different-hemispheric-cerebral-infarction
#2
Dongzhe Hou, Chunfang Wang, Yuanyuan Chen, Weijie Wang, Jingang Du
Abnormal long-range temporal correlation (LRTC) in EEG oscillation has been observed in several brain pathologies and mental disorders. This study examined the relationship between the LRTC of broadband EEG oscillation and depression following cerebral infarction with different hemispheric lesions to provide a novel insight into such depressive disorders. Resting EEGs of 16 channels in 18 depressed (9 left and 9 right lesions) and 21 non-depressed (11 left and 10 right lesions) subjects following cerebral infarction and 19 healthy control subjects were analysed by means of detrended fluctuation analysis, a quantitative measurement of LRTC...
December 2017: Cognitive Neurodynamics
https://www.readbyqxmd.com/read/29143207/contribution-of-eeg-in-transient-neurological-deficits
#3
Pierre Lozeron, Nadine Carole Tcheumeni, Sahar Turki, Hélène Amiel, Elodie Meppiel, Sana Masmoudi, Caroline Roos, Isabelle Crassard, Patrick Plaisance, Houria Benbetka, Jean-Pierre Guichard, Emmanuel Houdart, Hélène Baudoin, Nathalie Kubis
Identification of stroke mimics and 'chameleons' among transient neurological deficits (TND) is critical. Diagnostic workup consists of a brain imaging study, for a vascular disease or a brain tumour and EEG, for epileptiform discharges. The precise role of EEG in this diagnostic workup has, however, never been clearly delineated. However, this could be crucial in cases of atypical or incomplete presentation with consequences on disease management and treatment. We analysed the EEG patterns on 95 consecutive patients referred for an EEG within 7 days of a TND with diagnostic uncertainty...
November 15, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29132379/effects-of-somatosensory-electrical-stimulation-on-motor-function-and-cortical-oscillations
#4
Adelyn P Tu-Chan, Nikhilesh Natraj, Jason Godlove, Gary Abrams, Karunesh Ganguly
BACKGROUND: Few patients recover full hand dexterity after an acquired brain injury such as stroke. Repetitive somatosensory electrical stimulation (SES) is a promising method to promote recovery of hand function. However, studies using SES have largely focused on gross motor function; it remains unclear if it can modulate distal hand functions such as finger individuation. OBJECTIVE: The specific goal of this study was to monitor the effects of SES on individuation as well as on cortical oscillations measured using EEG, with the additional goal of identifying neurophysiological biomarkers...
November 13, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29130824/longitudinal-structural-and-functional-differences-between-proportional-and-poor-motor-recovery-after-stroke
#5
Adrian G Guggisberg, Pierre Nicolo, Leonardo G Cohen, Armin Schnider, Ethan R Buch
BACKGROUND: Evolution of motor function during the first months after stroke is stereotypically bifurcated, consisting of either recovery to about 70% of maximum possible improvement ("proportional recovery, PROP") or in little to no improvement ("poor recovery, POOR"). There is currently no evidence that any rehabilitation treatment will prevent POOR and favor PROP. OBJECTIVE: To perform a longitudinal and multimodal assessment of functional and structural changes in brain organization associated with PROP...
November 1, 2017: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/29119540/discrimination-of-stroke-related-mild-cognitive-impairment-and-vascular-dementia-using-eeg-signal-analysis
#6
Noor Kamal Al-Qazzaz, Sawal Hamid Bin Mohd Ali, Siti Anom Ahmad, Mohd Shabiul Islam, Javier Escudero
Stroke survivors are more prone to developing cognitive impairment and dementia. Dementia detection is a challenge for supporting personalized healthcare. This study analyzes the electroencephalogram (EEG) background activity of 5 vascular dementia (VaD) patients, 15 stroke-related patients with mild cognitive impairment (MCI), and 15 control healthy subjects during a working memory (WM) task. The objective of this study is twofold. First, it aims to enhance the discrimination of VaD, stroke-related MCI patients, and control subjects using fuzzy neighborhood preserving analysis with QR-decomposition (FNPAQR); second, it aims to extract and investigate the spectral features that characterize the post-stroke dementia patients compared to the control subjects...
November 8, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29112703/reply-defining-a-functional-network-homeostasis-after-stroke-eeg-based-approach-is-complementary-to-functional-mri
#7
Mohit H Adhikari, Gustavo Deco, Maurizio Corbetta
No abstract text is available yet for this article.
November 3, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29112697/defining-a-functional-network-homeostasis-after-stroke-eeg-based-approach-is-complementary-to-functional-mri
#8
Pietro Caliandro, Giuseppe Reale, Fabrizio Vecchio, Chiara Iacovelli, Francesca Miraglia, Gianvito Masi, Paolo Maria Rossini
No abstract text is available yet for this article.
November 3, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29106402/selective-neuronal-lapses-precede-human-cognitive-lapses-following-sleep-deprivation
#9
Yuval Nir, Thomas Andrillon, Amit Marmelshtein, Nanthia Suthana, Chiara Cirelli, Giulio Tononi, Itzhak Fried
Sleep deprivation is a major source of morbidity with widespread health effects, including increased risk of hypertension, diabetes, obesity, heart attack, and stroke. Moreover, sleep deprivation brings about vehicle accidents and medical errors and is therefore an urgent topic of investigation. During sleep deprivation, homeostatic and circadian processes interact to build up sleep pressure, which results in slow behavioral performance (cognitive lapses) typically attributed to attentional thalamic and frontoparietal circuits, but the underlying mechanisms remain unclear...
November 6, 2017: Nature Medicine
https://www.readbyqxmd.com/read/29063076/restless-legs-syndrome-secondary-to-pontine-infarction-clinical-analysis-of-five-cases
#10
Hou-Zhen Tuo, Ze-Long Tian, Yi-Nong Cui, Xiao-Yang Ma, Chun-Ling Xu, Hong-Yan Bi, Li-Yan Zhang, Yong-Bo Zhang, Wei-Dong Le, William Ondo
OBJECTIVE: Pontine infarction is a common type of stroke in the cerebral deep structures, resulting from occlusion of small penetrating arteries, may manifest as hemi-paralysis, hemi-sensory deficit, ataxia, vertigo, and bulbar dysfunction, but patients presenting with restless legs syndrome (RLS) are extremely rare. Herein, we reported five cases with RLS as a major manifestation of pontine infarction. METHODS: Five cases of pontine infarction related RLS were collected from July 2013 to February 2016...
September 2017: Chronic Dis Transl Med
https://www.readbyqxmd.com/read/29060863/asymmetry-of-hemispheric-interdependences-in-the-early-hours-following-unilateral-stroke-an-electrophysiological-study-in-rats
#11
Xiaoli Guo, Wenqing Wu, Shanbao Tong
Disturbance of interhemispheric interactions after stroke has been widely reported. However, the dynamic change in the hyperacute stage of stroke remains to be elucidated. In this study, interhemispheric interactions and brain asymmetry in the early hours after infarction were investigated in animals from the aspect of nonlinear interdependences using bilateral EEG recordings. Both the right-to-left and the left-to-right hemispheric interdependences were impaired after unilateral stroke, with a significant decrease in the first two hours and a low level in the following twenty-two hours...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060572/classification-enhancement-for-post-stroke-dementia-using-fuzzy-neighborhood-preserving-analysis-with-qr-decomposition
#12
Noor Kamal Al-Qazzaz, Sawal Ali, Siti Anom Ahmad, Javier Escudero
The aim of the present study was to discriminate the electroencephalogram (EEG) of 5 patients with vascular dementia (VaD), 15 patients with stroke-related mild cognitive impairment (MCI), and 15 control normal subjects during a working memory (WM) task. We used independent component analysis (ICA) and wavelet transform (WT) as a hybrid preprocessing approach for EEG artifact removal. Three different features were extracted from the cleaned EEG signals: spectral entropy (SpecEn), permutation entropy (PerEn) and Tsallis entropy (TsEn)...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060545/stroke-lesion-location-influences-the-decoding-of-movement-intention-from-eeg
#13
Eduardo Lopez-Larraz, Andreas M Ray, Thiago C Figueiredo, Carlos Bibian, Niels Birbaumer, Ander Ramos-Murguialday
Recent studies have demonstrated the efficacy of brain-machine interfaces (BMI) for motor rehabilitation after stroke, especially for those patients with severe paralysis. However, a cerebro-vascular accident can affect the brain in many different manners, and lesions in diverse areas, even from significantly different volumes, can lead to similar or equal motor deficits. The location of the insult influences the way the brain activates when moving or attempting to move a paralyzed limb. Since the essence of a rehabilitative BMI is to precisely decode motor commands from the brain, it is crucial to characterize how lesion location affects the measured signals and if and how it influences BMI performance...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060267/eeg-guided-robotic-mirror-therapy-system-for-lower-limb-rehabilitation
#14
Yeganeh M Marghi, Amir B Farjadian, Sheng-Che Yen, Deniz Erdogmus
Lower extremity function recovery is one of the most important goals in stroke rehabilitation. Many paradigms and technologies have been introduced for the lower limb rehabilitation over the past decades, but their outcomes indicate a need to develop a complementary approach. One attempt to accomplish a better functional recovery is to combine bottom-up and top-down approaches by means of brain-computer interfaces (BCIs). In this study, a BCI-controlled robotic mirror therapy system is proposed for lower limb recovery following stroke...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060204/movement-related-brain-oscillations-vary-with-lesion-location-in-severely-paralyzed-chronic-stroke-patients
#15
Andreas M Ray, Eduardo Lopez-Larraz, Thiago C Figueiredo, Niels Birbaumer, Ander Ramos-Murguialday
In the past few years, innovative upper-limb rehabilitation methods have been proposed for chronic stroke patients. These methods aim at functional motor rehabilitation using Brain-machine interfaces to constitute an alternate pathway from the brain to the muscles. Even in patients with absence of residual finger movements, recovery could be achieved. The extent to which these interventions are affected by individual lesion topology is yet to be understood. In this study EEG was measured in 30 chronic stroke patients during movement attempts of the paretic arm...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29058341/multichannel-wearable-fnirs-eeg-system-for-long-term-clinical-monitoring
#16
Ali Kassab, Jérôme Le Lan, Julie Tremblay, Phetsamone Vannasing, Mahya Dehbozorgi, Philippe Pouliot, Anne Gallagher, Frédéric Lesage, Mohamad Sawan, Dang Khoa Nguyen
Continuous brain imaging techniques can be beneficial for the monitoring of neurological pathologies (such as epilepsy or stroke) and neuroimaging protocols involving movement. Among existing ones, functional near-infrared spectroscopy (fNIRS) and electroencephalography (EEG) have the advantage of being noninvasive, nonobstructive, inexpensive, yield portable solutions, and offer complementary monitoring of electrical and local hemodynamic activities. This article presents a novel system with 128 fNIRS channels and 32 EEG channels with the potential to cover a larger fraction of the adult superficial cortex than earlier works, is integrated with 32 EEG channels, is light and battery-powered to improve portability, and can transmit data wirelessly to an interface for real-time display of electrical and hemodynamic activities...
October 23, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29055718/online-detection-of-amplitude-modulation-of-motor-related-eeg-desynchronization-using-a-lock-in-amplifier-comparison-with-a-fast-fourier-transform-a-continuous-wavelet-transform-and-an-autoregressive-algorithm
#17
Kenji Kato, Kensho Takahashi, Nobuaki Mizuguchi, Junichi Ushiba
BACKGROUND: Neurofeedback of event-related desynchronization (ERD) in electroencephalograms (EEG) of the sensorimotor cortex (SM1) using a brain-computer interface (BCI) paradigm is a powerful tool to promote motor recovery from post-stroke hemiplegia. However, the feedback delay attenuates the degree of motor learning and neural plasticity. NEW METHOD: The present study aimed to shorten the delay time to estimate amplitude modulation of the motor-imagery-related alpha and beta SM1-ERD using a lock-in amplifier (LIA) algorithm...
October 20, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29051688/facilitating-motor-imagery-based-brain-computer-interface-for-stroke-patients-using-passive-movement
#18
Mahnaz Arvaneh, Cuntai Guan, Kai Keng Ang, Tomas E Ward, Karen S G Chua, Christopher Wee Keong Kuah, Gopal Joseph Ephraim Joseph, Kok Soon Phua, Chuanchu Wang
Motor imagery-based brain-computer interface (MI-BCI) has been proposed as a rehabilitation tool to facilitate motor recovery in stroke. However, the calibration of a BCI system is a time-consuming and fatiguing process for stroke patients, which leaves reduced time for actual therapeutic interaction. Studies have shown that passive movement (PM) (i.e., the execution of a movement by an external agency without any voluntary motions) and motor imagery (MI) (i.e., the mental rehearsal of a movement without any activation of the muscles) induce similar EEG patterns over the motor cortex...
2017: Neural Computing & Applications
https://www.readbyqxmd.com/read/29043535/towards-multilevel-mental-stress-assessment-using-svm-with-ecoc-an-eeg-approach
#19
Fares Al-Shargie, Tong Boon Tang, Nasreen Badruddin, Masashi Kiguchi
Mental stress has been identified as one of the major contributing factors that leads to various diseases such as heart attack, depression, and stroke. To avoid this, stress quantification is important for clinical intervention and disease prevention. This study aims to investigate the feasibility of exploiting electroencephalography (EEG) signals to discriminate between different stress levels. We propose a new assessment protocol whereby the stress level is represented by the complexity of mental arithmetic (MA) task for example, at three levels of difficulty, and the stressors are time pressure and negative feedback...
October 18, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29035834/synergistic-effect-of-mild-hypothermia-and-the-notch-inhibitor-dapt-against-post-stroke-seizures
#20
Guo-Shuai Yang, Xiao-Yan Zhou, Xue-Fang An, Xuan-Jun Liu, Yan-Jun Zhang, Dan Yu
Seizure is a serious complication of stroke, indicating poor prognosis. Notch signaling is associated with neuronal activity. Inhibition of Notch signaling suppresses seizure activity induced by kainic acid. The present study investigated the effect of the Notch inhibitor, DAPT, alone or in combination with mild hypothermia, on post-stroke seizures. A global cerebral ischemia (GCI) model was performed in Sprague Dawley (SD) male rats. Seizure activity was evaluated by the frequency of seizure attacks, seizure severity scores, and seizure discharges...
October 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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