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Neurophysiologie Clinique, Clinical Neurophysiology

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https://www.readbyqxmd.com/read/28318816/use-of-electromyography-to-optimize-lokomat-%C3%A2-settings-for-subject-specific-gait-rehabilitation-in-post-stroke-hemiparetic-patients-a-proof-of-concept-study
#1
Yosra Cherni, Mickael Begon, Hicham Chababe, Florent Moissenet
OBJECTIVES: While generic protocols exist for gait rehabilitation using robotic orthotics such as the Lokomat(®), several settings - guidance, body-weight support (BWS) and velocity - may be adjusted to individualize patient training. However, no systematic approach has yet emerged. Our objective was to assess the feasibility and effects of a systematic approach based on electromyography to determine subject-specific settings with application to the strengthening of the gluteus maximus muscle in post-stroke hemiparetic patients...
March 16, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28314522/increased-photosensitivity-following-short-sleep-in-sleep-deprived-patients
#2
Ayşe Deniz Elmalı, Hatice Kurucu, Özdem Ertürk Çetin, Özlem Çokar, Zeliha Matur, Ayşin Dervent, Gülçin Benbir Şenel, Candan Gürses, Veysi Demirbilek
INTRODUCTION: We aimed to determine the effect of short day-time sleep on photoparoxysmal epileptic activity in sleep-deprived patients. METHODS: We retrospectively reviewed video-EEG recordings performed between 2003 and 2015. All recordings following at least four hours of sleep deprivation, including intermittent photic stimulation (IPS) both before and after sleep with any form of epileptiform activity were included. The study group was divided into four subgroups: (1) no photoparoxysmal response (PPR) group, with epileptiform activities other than PPRs; (2) increment group, with PPR duration increased by ≥200% after vs...
March 14, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28314521/orienting-reaction-may-help-recognition-of-patients-with-psychogenic-nonepileptic-seizures
#3
Murat Yalçın, Evrim Tellioğlu, Ayşegül Gündüz, Mine Özmen, Naz Yeni, Çiğdem Özkara, Meral E Kiziltan
OBJECTIVE: Psychogenic nonepileptic seizures (PNES) are abrupt, paroxysmal changes in behavior or consciousness that may phenomenologically resemble epileptic seizures. Given the known association between anxiety and PNES, we hypothesized that in these subjects there may be evidence that the nervous system is hypersensitive to external stimuli. We aimed to test our hypothesis by means of the auditory startle reaction (ASR). By investigating ASR, we also had the opportunity to test presence of orienting reaction, which is generally defined as the second phase of response after the auditory stimulus, with longer latency...
March 14, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28314520/interaction-between-postural-asymmetry-and-visual-feedback-effects-in-undisturbed-upright-stance-control-in-healthy-adults
#4
Patrice R Rougier, Samir Boudrahem
OBJECTIVES: The technique of additional visual feedback has been shown to significantly decrease the center of pressure (CP) displacements of a standing subject. Body-weight asymmetry is known to increase postural instability due to difficulties in coordinating the reaction forces exerted under each foot and is often a cardinal feature of various neurological and traumatic diseases. To examine the possible interactions between additional visual feedback and body-weight asymmetry effects, healthy adults were recruited in a protocol with and without additional visual feedback, with different levels of body-weight asymmetry...
March 14, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28314519/after-effects-of-peripheral-neurostimulation-on-brain-plasticity-and-ankle-function-in-chronic-stroke-the-role-of-afferents-recruited
#5
Louis-David Beaulieu, Hugo Massé-Alarie, Samuel Camiré-Bernier, Édith Ribot-Ciscar, Cyril Schneider
AIMS OF THE STUDY: This study tested the after-effects of neuromuscular electrical stimulation (NMES), repetitive peripheral magnetic stimulation (rPMS) and muscle tendon vibration (VIB) on brain plasticity and sensorimotor impairments in chronic stroke to investigate whether different results could depend on the nature of afferents recruited by each technique. MATERIALS AND METHODS: Fifteen people with chronic stroke participated in five sessions (one per week)...
March 14, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28314518/the-interface-between-chronic-fatigue-syndrome-and-depression-a-psychobiological-and-neurophysiological-conundrum
#6
Derek Larkin, Colin R Martin
The chronic fatigue syndrome (CFS) remains a contentious and controversial presentation despite decades of systematic research from a variety of medical specialties and associated disciplines. Variously championed as a condition of immunological, neurological, neurophysiological, psychiatric or psychological origin, consensus on a cogent and evidenced-based pathway has yet to be achieved. Irrespective of the ambiguity regarding aetiology, what is incontrovertible is the experience of significant depression, which often accompanies this most distressing clinical presentation...
March 14, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28215469/depression-and-implicit-emotion-processing-an-eeg-study
#7
Andrey V Bocharov, Gennady G Knyazev, Alexander N Savostyanov
OBJECTIVES: Depression is one of the most prevalent mental illnesses and is associated with changes in emotion processing. The aim of this study was to determine the influence of depressive symptoms on EEG oscillatory dynamics accompanying implicit processing of angry and happy facial expressions in 46 healthy subjects. METHODS: The Beck Depression Inventory was used to assess the presence of depressive symptoms in normal subjects. During the experiment, they were told to categorize the gender of angry, neutral, or happy faces presented to them, while high-resolution EEG was recorded...
February 16, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28162844/clinical-correlates-of-sural-neurography-impairment-within-normal-limits-in-patients-with-parkinsons-disease
#8
LETTER
Veit Mylius, Michael Teepker, Hela G Zouari, Serafin Beer, Karsten Schepelmann, Jens C Möller
No abstract text is available yet for this article.
February 2, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28162843/a-sociological-stance-on-fatigue-and-tiredness-social-inequalities-norms-and-representations
#9
Marc Loriol
Fatigue is complex, representing simultaneously a physiological, psychological and social phenomenon. The sociological approach attempts to understand the experience of fatigue and its characterization at diverse periods and in various social contexts. After giving a sociological history of different forms of fatigue through the ages (acedia, melancholy, neurasthenia, chronic fatigue syndrome, etc.), this article proposes a social epidemiology of fatigue in the current period. Objectification of working and living conditions allows us to illustrate social inequalities in fatigue and exhaustion, but seems to contradict dominant social representations of fatigue today...
February 2, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28159419/a-reappraisal-of-the-privileged-application-of-clinical-neurophysiology-in-the-intensive-care-unit
#10
EDITORIAL
Jean-Michel Guérit, Nathalie André-Obadia
No abstract text is available yet for this article.
January 31, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28153715/neuromuscular-excitability-changes-produced-by-sustained-voluntary-contraction-and-response-to-mexiletine-in-myotonia-congenita
#11
Federica Ginanneschi, Andrea Mignarri, Sabrina Lucchiari, Gianna Ulzi, Giacomo P Comi, Alessandro Rossi, Maria Teresa Dotti
OBJECTIVE: To investigate the cause of transient weakness in myotonia congenita (MC) and the mechanism of action of mexiletine in reducing weakness. METHODS: The changes in neuromuscular excitability produced by 1min of maximal voluntary contractions (MVC) were measured on the amplitude of compound muscle action potentials (CMAP) in two patients with either recessive or dominant MC, compared to control values obtained in 20 healthy subjects. Measurements were performed again in MC patients after mexiletine therapy...
January 30, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28202333/easy-methods-to-make-the-neuronavigated-targeting-of-dlpfc-accurate-and-routinely-accessible-for-rtms
#12
Benjamin Pommier, François Vassal, Claire Boutet, Sophie Jeannin, Roland Peyron, Isabelle Faillenot
OBJECTIVES: Dorsolateral prefrontal cortex (DLPFC) is the main stimulation target for rTMS treatment of depression. DLPFC is located in the middle frontal gyrus and corresponds to the lateral part of Brodmann Areas 9 and 46. Current methods to locate the DLPFC are either based on head landmarks that are inaccurate, or based on MRI-neuronavigation. Neuronavigated-methods are based either on standardized stereotactic coordinates translated to the individual patient or on brain landmarks requiring neuroanatomical skills for their identification...
February 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28161090/repetitive-transcranial-magnetic-stimulation-combined-with-cognitive-training-for-the-treatment-of-alzheimer-s-disease
#13
Jean-Paul Nguyen, Alcira Suarez, Gilles Kemoun, Michel Meignier, Estelle Le Saout, Philippe Damier, Julien Nizard, Jean-Pascal Lefaucheur
OBJECTIVE: To assess the efficacy of a combination of cognitive training (COG) and repetitive transcranial magnetic stimulation (rTMS), on cognitive performance, locomotor activity, apathy, caregiver burden and dependence of patients with Alzheimer's disease (AD). METHODS: A combination of COG and rTMS was performed in 10 patients with AD (NeuroAD procedure) for a period of 5weeks (one session per day, 5days a week), without maintenance sessions. Patients were evaluated at the end of the treatment (D45) and 6months later (M6) by the Mini Mental State Examination (MMSE), the Alzheimer disease assessment scale - cognitive subscale (ADAS-Cog), various neuropsychological tests and clinical scores specific for locomotor activity, apathy, caregiver burden, and dependence, recorded before the study (baseline)...
February 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28161089/are-electrophysiological-features-related-to-disability-in-patients-with-anti-mag-neuropathy
#14
Aude Gesquière-Dando, Emilien Delmont, Mael Launay, Jose Boucraut, Sharham Attarian
OBJECTIVES: To explore clinical-neurophysiological correlations in anti-myelin-associated glycoprotein (anti-MAG) neuropathy. METHODS: Clinical and electrophysiological data of 42 patients with anti-MAG neuropathy were retrospectively analysed. Disability was evaluated using the Overall Neuropathy Limitation Scale (ONLS), motor impairment through MRC sum score and sensory deficiency through INCAT sensory score. Compound motor action potential (CMAP) sum score was calculated adding the distal CMAP amplitude of the median, ulnar, tibial and fibular nerves of both sides...
February 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28153716/easily-applicable-sep-monitoring-of-the-n20-wave-in-the-intensive-care-unit
#15
Jan H Baars, Jan-Philipp von Klitzing
In this technical note, a conveniently sized, single-channel somatosensory evoked potentials (SEP)-stimulation-recording unit for bedside use in the intensive care unit is presented. The validation of the SEP N20 wave in intensive care guidelines as initial parameter for the prognostic evaluation of cardiac arrest has increased the demand for a more widespread availability of SEP, outside the electrophysiological domain. A device with a simplified interface that safely guides the user through a complete examination and that includes artifact removal is a prerequisite for such more widespread use, in which expert interpretation can be reduced to a necessary minimum...
February 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/27993450/predictive-patterns-of-sensory-evoked-potentials-in-comatose-brain-injured-patients-evolving-to-brain-death
#16
Maenia Scarpino, Giovanni Lanzo, Riccardo Carrai, Francesco Lolli, Maria Luisa Migliaccio, Maddalena Spalletti, Adriano Peris, Aldo Amantini, Antonello Grippo
OBJECTIVE: To assess whether Somatosensory Evoked Potentials (SEPs), recorded within 24h after ICU admission, are reliable predictors of brain death (BD) in comatose patients with acquired brain injury of various aetiologies. METHODS: SEPs were classified as absent (A), pathological (P), and normal (N). Considering SEP recordings from both hemispheres, 6 patterns were identified: NN, NP, PP, NA, AP, and AA. The final endpoint was BD. RESULTS: Of the 203 patients included in the study, 70 (34%) evolved toward BD...
February 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/27988205/high-incidence-of-obstructive-sleep-apnea-syndrome-in-patients-with-late-onset-epilepsy
#17
Aude Maurousset, Bertrand De Toffol, Julien Praline, Julien Biberon, Nadège Limousin
OBJECTIVES: The objective of the present study was to evaluate the prevalence of obstructive sleep apnea (OSA) in patients with late-onset epilepsy (LOE) who were considered at higher risk of cardiovascular disease. METHODS: Polysomnography was performed on 27 patients with LOE. Berlin questionnaires and Epworth sleepiness score were performed on all patients. We compared clinical, demographic and anthropometric characteristics, questionnaire scores on the patients with no or mild OSA (group 1) and the patients with moderate or severe OSA (group 2)...
February 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/27856078/not-everything-that-shakes-is-a-seizure%C3%A2-role-of-continuous-eeg-in-the-intensive-care-unit
#18
Thomas Ritzenthaler, Chloé Laurencin, Nathalie André Obadia, Carole Bodonian, Frédéric Dailler
Treatment of status epilepticus often requires highly sedative drugs with risk of side effects. Correct diagnosis is mandatory in order to prevent introduction of usefulness treatments. We report a case of suspected myoclonic status epilepticus. A thalamic lesion secondary to an osmotic demyelination syndrome was found to be the likely etiology of the myoclonus. Electrophysiological data (electroencephalography and electromyography) provided evidence for a subcortical origin of myoclonus and use of continuous EEG allowed monitoring of drug withdrawal...
February 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/27771198/yield-of-repeated-intermittent-eeg-for-seizure-detection-in-critically-ill-adults
#19
Yannick Fogang, Benjamin Legros, Chantal Depondt, Nicolas Mavroudakis, Nicolas Gaspard
INTRODUCTION: Seizures are common in critically ill patients and prevalence can exceed 30% in the neuro-intensive care unit (ICU). Continuous EEG monitoring (cEEG) is the gold standard for seizure detection in critically ill patients. OBJECTIVES: To determine the yield of intermittent EEG (iEEG) to detect critically ill adult patients with seizures and to identify the factors that affect this yield. METHODS: We retrospectively analyzed cEEG data and medical records from 977 consecutive critically ill patients undergoing cEEG...
February 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/27771197/deficient-prepulse-inhibition-of-blink-reflex-in-migraine-and-its-relation-to-allodynia
#20
Ugur Uygunoglu, Aysegul Gunduz, Harika Devrimsel Ertem, Derya Uluduz, Sabahattin Saip, Baki Goksan, Aksel Siva, Nurten Uzun, Feray Karaali-Savrun, Meral Kızıltan
OBJECTIVE: Prepulse inhibition (PPI) of the blink reflex (BR) is a reduction in BR excitability due to a conditioning stimulus, reflecting sensory gating by brainstem structures. We aimed to analyze PPI changes during a painful episode in chronic or episodic migraine and its relation to allodynia, since abnormal brainstem filtering has been hypothesized in migraine pathophysiology. METHODS: We included 20 patients with migraine during headache episode, and age- and gender-matched 22 healthy subjects...
February 2017: Neurophysiologie Clinique, Clinical Neurophysiology
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