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https://www.readbyqxmd.com/read/28622529/automatic-multimodal-detection-for-long-term-seizure-documentation-in-epilepsy
#1
F Fürbass, S Kampusch, E Kaniusas, J Koren, S Pirker, R Hopfengärtner, H Stefan, T Kluge, C Baumgartner
OBJECTIVE: This study investigated sensitivity and false detection rate of a multimodal automatic seizure detection algorithm and the applicability to reduced electrode montages for long-term seizure documentation in epilepsy patients. METHODS: An automatic seizure detection algorithm based on EEG, EMG, and ECG signals was developed. EEG/ECG recordings of 92 patients from two epilepsy monitoring units including 494 seizures were used to assess detection performance...
May 25, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28576433/postictal-apnea-as-an-important-mechanism-for-sudep-a-near-sudep-with-continuous-eeg-ecg-emg-recording
#2
Lang Jin, Ying Zhang, Xiao-Li Wang, Wen-Juan Zhang, Yong-Hong Liu, Zhao Jiang
Sudden unexpected death in epilepsy (SUDEP) is one of the most frequent causes of death among patients with epilepsy. Most SUDEP or near-SUDEP are unwitnessed and not observed or recorded during video-EEG recording in epilepsy monitoring units. This report describes a young woman with post ictal apnea and generalized EEG suppression (PGES) after a secondary generalized tonic-clonic seizure (sGTCS). This was accompanied by bradycardia and then ventricular tachycardia (VT). But at the end of VT, the patient's breath recovered without any intervention, such as cardio-respiratory resuscitation...
May 30, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28476512/reactivity-of-alpha-rhythms-to-eyes-opening-the-berger-effect-during-menstrual-cycle-phases
#3
Olga M Bazanova, E D Nikolenko, Robert J Barry
The impact of the menstrual cycle on the alpha EEG reactivity to eyes opening (Berger effect) was studied in relation to hormonal and EMG indices. Repeated measurements of salivary progesterone and cortisol, forehead EMG, and EEG alpha-activity indices in 76 healthy women aged 18-27 were obtained in resting eyes closed (1min) and eyes open (30s) conditions. Ten recording sessions occurred, at 2-3day intervals, during 1-2 menstrual cycles. For example, if a participant had a menstrual cycle length of 30-32days, she could finish the investigation during 1cycle, but if she had a 24day cycle, she would finish the investigation over 1 1/2cycles...
May 2, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28476511/training-of-support-afferentation-in-postmenopausal-women
#4
O M Bazanova, N V Kholodina, E D Nikolenko, J Payet
We have recently shown a diminishing of the Menopause Index in old-aged women who underwent special training directed at the enhancement of support afferentation by increasing the plantar forefoot sensitivity (Bazanova et al., 2015). Based on these results we hypothesized, that purposeful training of support afferentation through stimulation of plantar graviceptors by Aikido practice will decrease excessive postural and psychoemotional tension not only in rest condition, but during cognitive and manual task performance too...
May 2, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28472337/eeg-datasets-for-motor-imagery-brain-computer-interface
#5
Hohyun Cho, Minkyu Ahn, Sangtae Ahn, Moonyoung Kwon, Sung Chan Jun
BACKGROUND: Most investigators of brain computer interface (BCI) research believe that BCI can be achieved through induced neuronal activity from the cortex, but not by evoked neuronal activity. Motor imagery (MI) based BCI is one of the standard concepts of BCI, in that the user can generate induced activity by imagining motor movements. However, variations in performance over sessions and subjects are too severe to overcome easily; therefore, a basic understanding and investigation of BCI performance variation is necessary to find critical evidence of performance variation...
May 4, 2017: GigaScience
https://www.readbyqxmd.com/read/28456867/the-temporal-dynamics-of-response-inhibition-and-their-modulation-by-cognitive-control
#6
Liisa Raud, René J Huster
Behavioral adjustments require interactions between distinct modes of cognitive control and response inhibition. Hypothetically, fast and global inhibition is exerted in the reactive control mode, whereas proactive control enables the preparation of inhibitory pathways in advance while relying on the slower selective inhibitory system. We compared the temporal progression of inhibition in the reactive and proactive control modes using simultaneous electroencephalography (EEG) and electromyography (EMG) recordings...
April 29, 2017: Brain Topography
https://www.readbyqxmd.com/read/28442359/emg-biofeedback-training-in-adult-attention-deficit-hyperactivity-disorder-an-active-control-training
#7
Beatrix Barth, Kerstin Mayer, Ute Strehl, Andreas J Fallgatter, Ann-Christine Ehlis
OBJECTIVE: The present study aimed at revealing neurophysiological effects induced by electromyography (EMG) based biofeedback, considered as a semi-active control condition in neurofeedback studies, in adult attention-deficit/hyperactivity disorder (ADHD) patients. METHODS: 20 adult ADHD patients trained their muscle activity in the left and right supraspinatus muscle over the course of 30 EMG biofeedback sessions. Changes induced by the EMG feedback were evaluated at a clinical and neurophysiological level; additionally, the relation between changes in EEG activity recorded at the vertex over the training course and changes of symptom severity over the treatment course were assessed in order to investigate the mechanisms underlying clinical effects of EMG biofeedback...
June 30, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28433001/principal-cell-types-of-sleep-wake-regulatory-circuits
#8
REVIEW
Barbara E Jones
Electrophysiological recordings indicate that neurons which discharge maximally in association with distinct sleep-wake states are distributed through the brain, albeit in differing proportions. As studied using juxtacellular recording and labeling within the basal forebrain, four functional principal cell types are distinguished as: wake/paradoxical sleep (W/PS)-, slow wave sleep (SWS)-, W- and PS-max active. They are each comprised by both GABA and glutamate neurons, in addition to acetylcholine neurons belonging to the W/PS group...
April 19, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/28431164/low-activity-microstates-during-sleep
#9
Hiroyuki Miyawaki, Yazan N Billeh, Kamran Diba
Study Objectives: To better understand the distinct activity patterns of the brain during sleep, we observed and investigated periods of diminished oscillatory and population spiking activity lasting for seconds during non-rapid eye movement (non-REM) sleep, which we call "LOW" activity sleep. Methods: We analyzed spiking and local field potential (LFP) activity of hippocampal CA1 region alongside neocortical electroencephalogram (EEG) and electromyogram (EMG) in 19 sessions from four male Long-Evans rats (260-360 g) during natural wake/sleep across the 24-hr cycle as well as data from other brain regions obtained from http://crcns...
June 1, 2017: Sleep
https://www.readbyqxmd.com/read/28397999/scalp-eeg-ictal-gamma-and-beta-activity-during-infantile-spasms-evidence-of-focality
#10
Hiroki Nariai, Jules Beal, Aristea S Galanopoulou, Wenzhu B Mowrey, Stephan Bickel, Yoshimi Sogawa, Rana Jehle, Shlomo Shinnar, Solomon L Moshé
OBJECTIVE: We investigated temporal and spatial characteristics of ictal gamma and beta activity on scalp EEG during spasms in patients with West syndrome (WS) to evaluate potential focal cortical onset. METHODS: A total of 1,033 spasms from 34 patients with WS of various etiologies were analyzed on video-electroencephalography (EEG) using time-frequency analysis. Ictal gamma (35-90 Hz) and beta (15-30 Hz) activities were correlated with visual symmetry of spasms, objective EMG (electromyography) analysis, and etiology of WS...
May 2017: Epilepsia
https://www.readbyqxmd.com/read/28391368/effects-of-auditory-distraction-on-voluntary-movements-exploring-the-underlying-mechanisms-associated-with-parallel-processing
#11
Marcelo Bigliassi, Costas I Karageorghis, Alexander V Nowicky, Michael J Wright, Guido Orgs
Highly demanding cognitive-motor tasks can be negatively influenced by the presence of auditory stimuli. The human brain attempts to partially suppress the processing of potential distractors in order that motor tasks can be completed successfully. The present study sought to further understand the attentional neural systems that activate in response to potential distractors during the execution of movements. Nineteen participants (9 women and 10 men) were administered isometric ankle-dorsiflexion tasks for 10 s at a light intensity...
April 8, 2017: Psychological Research
https://www.readbyqxmd.com/read/28380698/myoclonus-epilepsy-and-ataxia-due-to-kcnc1-mutation-analysis-of-20-cases-and-k-channel-properties
#12
Karen L Oliver, Silvana Franceschetti, Carol J Milligan, Mikko Muona, Simone A Mandelstam, Laura Canafoglia, Anna M Boguszewska-Chachulska, Amos D Korczyn, Francesca Bisulli, Carlo Di Bonaventura, Francesca Ragona, Roberto Michelucci, Bruria Ben-Zeev, Rachel Straussberg, Ferruccio Panzica, João Massano, Daniel Friedman, Arielle Crespel, Bernt A Engelsen, Frederick Andermann, Eva Andermann, Krystyna Spodar, Anetta Lasek-Bal, Patrizia Riguzzi, Elena Pasini, Paolo Tinuper, Laura Licchetta, Elena Gardella, Matthias Lindenau, Annette Wulf, Rikke S Møller, Felix Benninger, Zaid Afawi, Guido Rubboli, Christopher A Reid, Snezana Maljevic, Holger Lerche, Anna-Elina Lehesjoki, Steven Petrou, Samuel F Berkovic
OBJECTIVE: To comprehensively describe the new syndrome of myoclonus epilepsy and ataxia due to potassium channel mutation (MEAK), including cellular electrophysiological characterization of observed clinical improvement with fever. METHODS: We analyzed clinical, electroclinical, and neuroimaging data for 20 patients with MEAK due to recurrent KCNC1 p.R320H mutation. In vitro electrophysiological studies were conducted using whole cell patch-clamp to explore biophysical properties of wild-type and mutant KV 3...
May 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28373836/beware-recruitment-of-muscle-activity-by-the-eeg-neurofeedback-trainings-of-high-frequencies
#13
Katarzyna Paluch, Katarzyna Jurewicz, Jacek Rogala, Rafał Krauz, Marta Szczypińska, Mirosław Mikicin, Andrzej Wróbel, Ewa Kublik
EEG-neurofeedback (NFB) became a very popular method aimed at improving cognitive and behavioral performance. However, the EMG frequency spectrum overlies the higher EEG oscillations and the NFB trainings focusing on these frequencies is hindered by the problem of EMG load in the information fed back to the subjects. In such a complex signal, it is highly probable that the most controllable component will form the basis for operant conditioning. This might cause different effects in the case of various training protocols and therefore needs to be carefully assessed before designing training protocols and algorithms...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28325029/noninvasive-eeg-correlates-of-overground-and-stair-walking
#14
Justin A Brantley, Trieu Phat Luu, Recep Ozdemir, Fangshi Zhu, Anna T Winslow, Helen Huang, Jose L Contreras-Vidal
Automated walking intention detection remains a challenge in lower-limb neuroprosthetic systems. Here, we assess the feasibility of extracting motor intent from scalp electroencephalography (EEG). First, we evaluated the corticomuscular coherence between central EEG electrodes (C1, Cz, C2) and muscles of the shank and thigh during walking on level ground and stairs. Second, we trained decoders to predict the linear envelope of the surface electromyogram (EMG). We observed significant EEG-led corticomuscular coupling between electrodes and sEMG (tibialis anterior) in the high delta (3-4 Hz) and low theta (4-5 Hz) frequency bands during level walking, indicating efferent signaling from the cortex to peripheral motor neurons...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28298835/the-stretch-reflex-and-the-contributions-of-c-david-marsden
#15
REVIEW
Kalyan B Bhattacharyya
The stretch reflex or myotatic reflex refers to the contraction of a muscle in response to its passive stretching by increasing its contractility as long as the stretch is within physiological limits. For ages, it was thought that the stretch reflex was of short latency and it was synonymous with the tendon reflex, subserving the same spinal reflex arc. However, disparities in the status of the two reflexes in certain clinical situations led Marsden and his collaborators to carry out a series of experiments that helped to establish that the two reflexes had different pathways...
January 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28269717/assessment-of-sedation-analgesia-by-means-of-poincare%C3%AC-analysis-of-the-electroencephalogram
#16
Jose D Bolanos, Montserrat Vallverdu, Pere Caminal, Daniel F Valencia, Xavi Borrat, Pedro L Gambus, Jose F Valencia
Monitoring the levels of sedation-analgesia may be helpful for managing patient stress on minimally invasive medical procedures. Monitors based on EEG analysis and designed to assess general anesthesia cannot distinguish reliably between a light and deep sedation. In this work, the Poincaré plot is used as a nonlinear technique applied to EEG signals in order to characterize the levels of sedation-analgesia, according to observed categorical responses that were evaluated by means of Ramsay Sedation Scale (RSS)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269451/simultaneous-evaluation-of-prepulse-inhibition-with-emg-and-eeg-using-advanced-artifact-removal-techniques
#17
Francisco J Fraga, Claudemiro V Noya, Maria I Zimiani, Milton A Avila, Rosana Shuhama, Cristina M Del-Ben, Paulo R Menezes, Rodrigo S Martin, Cristiane Salum
Prepulse inhibition (PPI) consists of a reduction of the acoustic startle reflex (SR) magnitude (measured with EMG) when a startling stimulus is preceded by a non-startling one. This behavior has been extensively investigated in studies related to schizophrenia, since sensory-motor deficit plays a central role in its pathophysiology. However, the same auditory stimuli that trigger the SR also provoke intense auditory evoked responses (AEP), which can be measured with EEG. Comparing these two types of responses, acquired simultaneously, is a great opportunity to investigate the dependence and interdependence of their neural pathways...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269332/automatic-sleep-stage-classification-using-ear-eeg
#18
Andreas Stochholm, Kaare Mikkelsen, Preben Kidmose
Sleep assessment is of great importance in the diagnosis and treatment of sleep disorders. In clinical practice this is typically performed based on polysomnography recordings and manual sleep staging by experts. This procedure has the disadvantages that the measurements are cumbersome, may have a negative influence on the sleep, and the clinical assessment is labor intensive. Addressing the latter, there has recently been encouraging progress in the field of automatic sleep staging [1]. Furthermore, a minimally obtrusive method for recording EEG from electrodes in the ear (ear-EEG) has recently been proposed [2]...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269308/corticomuscular-coherence-variation-throughout-the-gait-cycle-during-overground-walking-and-ramp-ascent-a-preliminary-investigation
#19
Anna T Winslow, Justin Brantley, Fangshi Zhu, Jose L Contreras Vidal, He Huang
Recent designs of neural-machine interfaces (NMIs) incorporating electroencephalography (EEG) or electromyography (EMG) have been used in lower limb assistive devices. While the results of previous studies have shown promise, a NMI which takes advantage of early movement-related EEG activity preceding movement onset, as well as the improved signal-to-noise ratio of EMG, could prove to be more accurate and responsive than current NMI designs based solely on EEG or EMG. Previous studies have demonstrated that the activity of the sensorimotor cortex is coupled to the firing rate of motor units in lower limb muscles during voluntary contraction...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269284/cross-frequency-information-transfer-from-eeg-to-emg-in-grasping
#20
Winnie K Y So, Lingling Yang, Beth Jelfs, Qi She, Savio W H Wong, Joseph N Mak, Rosa H M Chan
This paper presents an investigation into the cortico-muscular relationship during a grasping task by evaluating the information transfer between EEG and EMG signals. Information transfer was computed via a non-linear model-free measure, transfer entropy (TE). To examine the cross-frequency interaction, TEs were computed after the times series were decomposed into various frequency ranges via wavelet transform. Our results demonstrate the capability of TE to capture the direct interaction between EEG and EMG...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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