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Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology

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https://www.readbyqxmd.com/read/28818554/reply-to-prolongation-of-terminal-latency-of-the-phrenic-nerve-in-amyotrophic-lateral-sclerosis-is-it-clinically-useful-and-what-are-the-mechanisms
#1
LETTER
Jin-Sung Park, Donghwi Park
No abstract text is available yet for this article.
July 31, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28811105/axonal-hyperexcitability-due-to-schwann-cell-involvement-in-chronic-progressive-external-ophthalmoplegia
#2
LETTER
Josef Finsterer, Sinda Zarrouk-Mahjoub
No abstract text is available yet for this article.
July 31, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28811104/a-double-determination-of-central-motor-conduction-time-in-the-assessment-of-hirayama-disease
#3
Chaojun Zheng, Dongqing Zhu, Feizhou Lu, Yu Zhu, Xiaosheng Ma, Xinlei Xia, Jianyuan Jiang
OBJECTIVE: To investigate central motor conduction time (CMCT) in patients with Hirayama disease (HD) and to analyse the role of motor nerve root lesions in the pathogenesis of HD. METHODS: CMCT measured by F-wave (CMCT-F) and by paravertebral magnetic stimulation (CMCT-M) was performed on both abductor pollicis brevis (APB) and abductor digiti minimi (ADM) in 41 HD patients and 22 controls. All patients underwent neck-flexion magnetic resonance imaging evaluation...
July 31, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28803716/prolongation-of-terminal-latency-of-the-phrenic-nerve-in-amyotrophic-lateral-sclerosis-is-it-clinically-useful-and-what-are-the-mechanisms
#4
LETTER
Mamede de Carvalho
No abstract text is available yet for this article.
July 31, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28778475/after-discharges-and-seizures-during-pediatric-extra-operative-electrical-cortical-stimulation-functional-brain-mapping-incidence-thresholds-and-determinants
#5
Gewalin Aungaroon, Alonso Zea Vera, Paul S Horn, Anna W Byars, Hansel M Greiner, Jeffrey R Tenney, Todd M Arthur, Nathan E Crone, Katherine D Holland, Francesco T Mangano, Ravindra Arya
OBJECTIVE: This study examined the incidence, thresholds, and determinants of electrical cortical stimulation (ECS)-induced after-discharges (ADs) and seizures. METHODS: Electrocorticograph recordings were reviewed to determine incidence of ECS-induced ADs and seizures. Multivariable analyses for predictors of AD/seizure occurrence and their thresholds were performed. RESULTS: In 122 patients, the incidence of ADs and seizures was 77% (94/122) and 35% (43/122) respectively...
July 18, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28774584/ictal-cardiac-activity-towards-a-wider-dynamical-vista
#6
EDITORIAL
Ivan Osorio
No abstract text is available yet for this article.
July 18, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28774583/language-and-motor-function-thresholds-during-pediatric-extra-operative-electrical-cortical-stimulation-brain-mapping
#7
Alonso Zea Vera, Gewalin Aungaroon, Paul S Horn, Anna W Byars, Hansel M Greiner, Jeffrey R Tenney, Todd M Arthur, Nathan E Crone, Katherine D Holland, Francesco T Mangano, Ravindra Arya
OBJECTIVE: To examine current thresholds and their determinants for language and motor mapping with extra-operative electrical cortical stimulation (ECS). METHODS: ECS electrocorticograph recordings were reviewed to determine functional thresholds. Predictors of functional thresholds were found with multivariable analyses. RESULTS: In 122 patients (age 11.9±5.4years), average minimum, frontal, and temporal language thresholds were 7.4 (± 3...
July 18, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28778476/the-standardized-eeg-electrode-array-of-the-ifcn
#8
REVIEW
Margitta Seeck, Laurent Koessler, Thomas Bast, Frans Leijten, Christoph Michel, Christoph Baumgartner, Bin He, Sándor Beniczky
Standardized EEG electrode positions are essential for both clinical applications and research. The aim of this guideline is to update and expand the unifying nomenclature and standardized positioning for EEG scalp electrodes. Electrode positions were based on 20% and 10% of standardized measurements from anatomical landmarks on the skull. However, standard recordings do not cover the anterior and basal temporal lobes, which is the most frequent source of epileptogenic activity. Here, we propose a basic array of 25 electrodes including the inferior temporal chain, which should be used for all standard clinical recordings...
July 17, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28772244/exploring-resting-state-eeg-brain-oscillatory-activity-in-relation-to-cognitive-functioning-in-multiple-sclerosis
#9
Philipp M Keune, Sascha Hansen, Emily Weber, Franziska Zapf, Juliane Habich, Jana Muenssinger, Sebastian Wolf, Michael Schönenberg, Patrick Oschmann
OBJECTIVE: Neurophysiologic monitoring parameters related to cognition in Multiple Sclerosis (MS) are sparse. Previous work reported an association between magnetoencephalographic (MEG) alpha-1 activity and information processing speed. While this remains to be replicated by more available electroencephalographic (EEG) methods, also other established EEG markers, e.g. the slow-wave/fast-wave ratio (theta/beta ratio), remain to be explored in this context. METHODS: Performance on standard tests addressing information processing speed and attention (Symbol-Digit Modalities Test, SDMT; Test of Attention Performance, TAP) was examined in relation to resting-state EEG alpha-1 and alpha-2 activity and the theta/beta ratio in 25MS patients...
July 14, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28756349/interrater-agreement-in-visual-scoring-of-neonatal-seizures-based-on-majority-voting-on-a-web-based-system-the-neoguard-eeg-database
#10
Anneleen Dereymaeker, Amir H Ansari, Katrien Jansen, Perumpillichira J Cherian, Jan Vervisch, Paul Govaert, Leen De Wispelaere, Charlotte Dielman, Vladimir Matic, Alexander Caicedo Dorado, Maarten De Vos, Sabine Van Huffel, Gunnar Naulaers
OBJECTIVE: To assess interrater agreement based on majority voting in visual scoring of neonatal seizures. METHODS: An online platform was designed based on a multicentre seizure EEG-database. Consensus decision based on 'majority voting' and interrater agreement was estimated using Fleiss' Kappa. The influences of different factors on agreement were determined. RESULTS: 1919 Events extracted from 280h EEG of 71 neonates were reviewed by 4 raters...
July 12, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28778057/unsupervised-detection-and-removal-of-muscle-artifacts-from-scalp-eeg-recordings-using-canonical-correlation-analysis-wavelets-and-random-forests
#11
Maria N Anastasiadou, Manolis Christodoulakis, Eleftherios S Papathanasiou, Savvas S Papacostas, Georgios D Mitsis
OBJECTIVE: This paper proposes supervised and unsupervised algorithms for automatic muscle artifact detection and removal from long-term EEG recordings, which combine canonical correlation analysis (CCA) and wavelets with random forests (RF). METHODS: The proposed algorithms first perform CCA and continuous wavelet transform of the canonical components to generate a number of features which include component autocorrelation values and wavelet coefficient magnitude values...
July 8, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28756348/measuring-alterations-in-oscillatory-brain-networks-in-schizophrenia-with-resting-state-meg-state-of-the-art-and-methodological-challenges
#12
Golnoush Alamian, Ana-Sofía Hincapié, Annalisa Pascarella, Thomas Thiery, Etienne Combrisson, Anne-Lise Saive, Véronique Martel, Dmitrii Althukov, Frédéric Haesebaert, Karim Jerbi
OBJECTIVE: Neuroimaging studies provide evidence of disturbed resting-state brain networks in Schizophrenia (SZ). However, untangling the neuronal mechanisms that subserve these baseline alterations requires measurement of their electrophysiological underpinnings. This systematic review specifically investigates the contributions of resting-state Magnetoencephalography (MEG) in elucidating abnormal neural organization in SZ patients. METHOD: A systematic literature review of resting-state MEG studies in SZ was conducted...
July 8, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28755545/stereo-electroencephalography-identifies-n2-sleep-and-spindles-in-human-hippocampus
#13
Nicolas Carpentier, Thierry Cecchin, Laurent Koessler, Valérie Louis-Dorr, Jacques Jonas, Jean-Pierre Vignal, Marc Carpentier, William Szurhaj, Patrice Bourgin, Louis Maillard
OBJECTIVES: To describe the hippocampal stereo-electroencephalogram during sleep according to sleep stages (including N2 sleep) and cycles, together with the hippocampal spindles. METHODS: All patients with drug-resistant focal epilepsy undergoing intra-hippocampal implantation between August 2012 and June 2013 at Nancy University Hospital were screened. Six patients with explored hippocampus devoid of pathological features were analyzed. During one night, we identified continuous periods of successive N2, N3 and REM sleep for two full cycles...
July 8, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28753456/synaptic-damage-underlies-eeg-abnormalities-in-postanoxic-encephalopathy-a-computational-study
#14
B J Ruijter, J Hofmeijer, H G E Meijer, M J A M van Putten
OBJECTIVE: In postanoxic coma, EEG patterns indicate the severity of encephalopathy and typically evolve in time. We aim to improve the understanding of pathophysiological mechanisms underlying these EEG abnormalities. METHODS: We used a mean field model comprising excitatory and inhibitory neurons, local synaptic connections, and input from thalamic afferents. Anoxic damage is modeled as aggravated short-term synaptic depression, with gradual recovery over many hours...
July 8, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28750290/high-frequency-activity-overriding-cortico-cortical-evoked-potentials-reflects-altered-excitability-in-the-human-epileptic-focus
#15
Katsuya Kobayashi, Riki Matsumoto, Masao Matsuhashi, Kiyohide Usami, Akihiro Shimotake, Takeharu Kunieda, Takayuki Kikuchi, Kazumichi Yoshida, Nobuhiro Mikuni, Susumu Miyamoto, Hidenao Fukuyama, Ryosuke Takahashi, Akio Ikeda
OBJECTIVE: We aimed to clarify that high frequency activity (HFA) of cortico-cortical evoked potentials (CCEPs), elicited by single pulse electrical stimulation (SPES), reflects cortical excitability. METHODS: We recruited 16 patients with refractory partial epilepsy who had chronic subdural electrode implantation for presurgical evaluation. A repetitive SPES was given to (1) the seizure onset zone (SOZ) and (2) the control cortices (non-seizure onset zone: nSOZ)...
July 8, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28738276/the-impact-of-accelerated-high-frequency-rtms-on-brain-neurochemicals-in-treatment-resistant-depression-insights-from-1-h-mr-spectroscopy
#16
Chris Baeken, Jean-Pascal Lefaucheur, Peter Van Schuerbeek
OBJECTIVE: Although accelerated repetitive transcranial magnetic stimulation (rTMS) designs seem to be able to alleviate mood over a relatively short period of time, no studies yet examined the cellular effects on neurochemicals with regard to working mechanisms, safety and neural integrity. METHODS: Eighteen right-handed antidepressant-free unipolar treatment resistant depressed (TRD) patients participated in this sham-controlled accelerated high frequency (aHF)-rTMS (1)H MR spectroscopy study applied to the left dorsolateral prefrontal cortex (DLPFC)...
July 6, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28738275/early-childhood-myoclonic-epilepsy-an-independent-genetic-generalized-epilepsy-with-myoclonic-seizures-as-the-main-seizure-type
#17
Zhixian Yang, Jiao Xue, Hui Li, Ping Qian, Xiaoyan Liu, Yuwu Jiang, Yuehua Zhang
OBJECTIVE: To elucidate the characteristics of the myoclonic seizures alone, or predominant myoclonus combined with generalized tonic-clonic seizures (GTCS) and/or absences, in early childhood, and discuss its classification. METHODS: Forty-two children were retrospectively recruited between January 2006 and June 2015. RESULTS: The mean age of seizure onset was 40.5months. They were divided into 4 groups: myoclonic seizures alone; predominant myoclonus combined with GTCS; predominant myoclonus combined with absences; predominant myoclonus combined with both GTCS and absences...
July 6, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28736118/guidelines-for-low-intensity-transcranial-electrical-stimulation-an-overdue-step-in-a-fairly-uncontrolled-field
#18
EDITORIAL
Reinhard Dengler
No abstract text is available yet for this article.
July 6, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28732342/scope-mtl-a-non-invasive-tool-for-identifying-and-lateralizing-mesial-temporal-lobe-seizures-prior-to-scalp-eeg-ictal-onset
#19
Alice D Lam, Douglas Maus, Sahar F Zafar, Andrew J Cole, Sydney S Cash
OBJECTIVE: In mesial temporal lobe (mTL) epilepsy, seizure onset can precede the appearance of a scalp EEG ictal pattern by many seconds. The ability to identify this early, occult mTL seizure activity could improve lateralization and localization of mTL seizures on scalp EEG. METHODS: Using scalp EEG spectral features and machine learning approaches on a dataset of combined scalp EEG and foramen ovale electrode recordings in patients with mTL epilepsy, we developed an algorithm, SCOPE-mTL, to detect and lateralize early, occult mTL seizure activity, prior to the appearance of a scalp EEG ictal pattern...
July 1, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28719826/the-terminal-latency-of-the-phrenic-nerve-correlates-with-respiratory-symptoms-in-amyotrophic-lateral-sclerosis
#20
Jin-Sung Park, Donghwi Park
OBJECTIVE: The aim of the study was to investigate the electrophysiological parameters in phrenic nerve conduction studies (NCS) that sensitively reflect latent respiratory insufficiency present in amyotrophic lateral sclerosis (ALS). METHOD: Forty-nine patients with ALS were examined, and after exclusion, 21 patients with ALS and their phrenic NCS results were reviewed. The patients were divided into two groups according to their respiratory sub-score in the ALS functional rating scale - revised (Group A, sub-score 12vs...
July 1, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
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