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Neurophysiologie Clinique, Clinical Neurophysiology

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...
October 19, 2016: Neurophysiologie Clinique, Clinical Neurophysiology
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...
October 19, 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Susana Pinto, Pedro Alves, Michael Swash, Mamede de Carvalho
AIMS OF THE STUDY: To compare the assessment of respiratory decline with conventional tests, measurement of diaphragm compound muscle action potential (CMAP) to phrenic nerve stimulation and diaphragm thickness to ultrasound (US) investigation in amyotrophic lateral sclerosis (ALS) patients followed for a short period of time. PATIENTS AND METHODS: We evaluated in 40 consecutive ALS patients, the clinical functional scale (ALSFRS-R), forced vital capacity (FVC), maximal voluntary ventilation (MVV), maximal inspiratory (MIP) and expiratory (MEP) pressures, sniff nasal inspiratory pressure (SNIP), Diaphragm-CMAP (latency and amplitude) and diaphragm US (maximal and minimal diaphragm thickness during full inspiration and expiration, respectively)...
October 14, 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Md Kafiul Islam, Amir Rastegarnia, Zhi Yang
Electroencephalography (EEG) is the most popular brain activity recording technique used in wide range of applications. One of the commonly faced problems in EEG recordings is the presence of artifacts that come from sources other than brain and contaminate the acquired signals significantly. Therefore, much research over the past 15 years has focused on identifying ways for handling such artifacts in the preprocessing stage. However, this is still an active area of research as no single existing artifact detection/removal method is complete or universal...
October 14, 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Robin E Luijmes, Sjaak Pouwels, Jacko Boonman
OBJECTIVES: Alzheimer's disease (AD) is the most common form of dementia. In quantified EEG (qEEG), the AD patients have a greater amount of theta activity compared with normal elderly individuals. Little is known about the effect of neurofeedback in patients with dementia. The objective of this study was to examine whether neurofeedback has a positive effect on cognitive performance in patients with AD. METHODS: Ten patients with qEEG meeting criteria for AD received neurofeedback training...
June 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Jean-Pascal Lefaucheur, Mamede de Carvalho
No abstract text is available yet for this article.
June 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Agnès Daurat, Majdouline Sarhane, Michel Tiberge
Obstructive sleep apnea syndrome (OSAS) is a sleep-related breathing disorder characterized by repetitive episodes of airflow cessation, resulting in brief arousals and intermittent hypoxemia. OSAS is associated with a number of adverse health consequences, and cognitive difficulties. The overall pattern of cognitive impairment in OSAS is complex, and research in this field is mixed. On balance, OSAS have negative effects on cognition, most likely in the domain of attention/vigilance, verbal and visual delayed long-term memory, and executive functions...
June 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Munevver Celik Gokyigit, Ibrahim Ercan, Selma Seker, Lale Gundogdu Celebi, Cumhur Ertekin
In this study, the responses of thyroarytenoid (TA) and cricopharyngeus (CP) muscles were simultaneously recorded to peripheral magnetic stimulation of the vagus nerve. Recordings were performed in 13 subjects by means of concentric needle EMG electrodes inserted in the TA and CP. Magnetic shocks were delivered to the vagus nerve with a round coil placed occipitally, while EMG was silent in the TA. In all subjects, clear-cut responses were obtained simultaneously in both muscles. In TA compared to CP, the maximum amplitude of the responses were higher, whereas the onset latency was shorter...
June 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Ozdem Erturk, Baris Korkmaz, Gulce Alev, Veysi Demirbilek, Meral Kiziltan
An important clinical feature of autism is the presence of atypical responses to sensory stimuli. In this study, we investigated if high functioning autistic patients had abnormalities in the blink reflex and the startle reaction to auditory or somatosensory stimuli. Fourteen patients aged between 7 and 16 years were included in the study. We found a longer latency of the blink reflex, an increased duration and amplitude of the auditory startle reaction and a lower presence rate of the somatosensorial startle reaction in autistic patients...
June 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Yaprak Seçil, Şehnaz Arıcı, Tülay Kurt İncesu, Nevin Gürgör, Yeşim Beckmann, Cumhur Ertekin
OBJECTIVE: To investigate electrophysiological parameters of swallowing in all stages of Alzheimer's disease. METHODS: Forty Alzheimer's disease patients, 20 age-matched normal controls and 20 young normal controls were included. Dysphagia limit (DL) and sequential water swallowing (SWS) tests were performed. Cardiac rhythm, respiration and sympathetic skin responses were concomitantly recorded. RESULTS: Dysphagia was found in 30/40 (75%) of Alzheimer's disease patients...
June 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Melis Sohtaoğlu, Meral E Kızıltan, Ayşegül Gündüz, Melda Bozluolçay
OBJECTIVES: The auditory startle reaction (ASR) and startle reflex to somatosensory inputs (SSS) are stereotypical responses to sudden and unexpected stimuli, which are generated in the caudal brainstem reticular formation. Changes of ASR are relatively well known in stroke. Here, we aimed to investigate central pathways of SSS and plasticity changes of SSS circuits in different stages and localizations of stroke, by comparing with ASR. METHODS: We prospectively included 39 patients with stroke between June 2009 and June 2013, and 23 age and gender-matched healthy subjects...
June 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Nathalie Chastan, Axel Lebas, Floriane Legoff, Dominique Parain, Lucie Guyant-Marechal
Electroencephalographic (EEG) abnormalities have been reported during migraine attacks but their spatial and temporal distributions are not well known. We report the temporospatial dynamics of EEG during the full duration of a migraine attack with aura in a 19-year-old woman. She experienced episodes of hemiplegic migraine since the age of 2.5 years, with right hemibody paralysis preceded by visual symptoms. She reported severe pain of the right hemibody just before hemiplegia that was enventually suggestive of possible epileptic seizure, justifying diagnostic video-EEG monitoring...
May 4, 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Jean-Pascal Lefaucheur, Thomas Picht
The surgical removal of brain tumours in so-called eloquent regions is frequently associated with a high risk of causing disabling postoperative deficits. Among the preoperative techniques proposed to help neurosurgical planning and procedure, navigated transcranial magnetic stimulation (nTMS) is increasingly performed. A high level of evidence is now available in the literature regarding the anatomical and functional accuracy of this mapping technique. This article presents the principles and facts demonstrating the value of using nTMS in clinical practice to preserve motor or language functions from deleterious lesions secondary to brain tumour resection or epilepsy surgery...
April 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Amina Gargouri-Berrechid, Amina Nasri, Imen Kacem, Youssef Sidhom, Istabrak Abdelkefi, Yosr Hizem, Mouna Ben Djebrara, Riadh Gouider
OBJECTIVES: To describe the EEG characteristics of patients with Unverricht-Lundborg disease (ULD) and their changes during the long-term evolution of the disease. METHODS: A retrospective study including all patients with ULD confirmed by molecular biology and more than 15 years' duration of disease progression at the time of inclusion. EEGs were recorded at inclusion, 2 years and 5 years of follow-up. Patients who discontinued treatment during follow-up had an EEG monitoring 1 year after reintroduction of therapy...
April 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Jean-Pascal Lefaucheur
No abstract text is available yet for this article.
April 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Xian Sun, Zhecheng Zhang, Na Liu
Flail arm syndrome (FAS), a variant of amyotrophic lateral sclerosis (ALS), has many similarities with upper limb onset ALS (UL-ALS). This study analyzed the compound muscle action potentials (CMAPs) recorded from abductor pollicis brevis (APB) and abductor digiti minimi (ADM) muscles in patients presenting these two types of ALS variants, compared to normal controls. The APB/ADM CMAP amplitude ratio was lower in the UL-ALS group (mean±SEM: 0.56±0.37), consistent with a split hand, compared to the FAS (1...
April 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Paul Sauleau, Jane Despatin, Xufei Cheng, Martine Lemesle, Anne Touzery-de Villepin, Sylvie N'Guyen The Tich, Nathalie Kubis
OBJECTIVES: Assessment of current practice and the need for tele-transmission and remote interpretation of EEG in France. Transmission of EEG to a distant center could be a promising solution to the problem of decreasing availability of neurophysiologists for EEG interpretation, in order to provide equity within health care services in France. This practice should logically follow the legal framework of telemedicine and the recommendations that were recently edited by the Société de neurophysiologie clinique de langue française (SNCLF) and the Ligue française contre l'épilepsie (LCFE)...
April 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Eman M Khedr, Khaled A M Elbeh, Yasser Elserogy, Hossam E Khalifa, Mohamed A Ahmed, Mahmoud H Hafez, Anwar M Ali, Noha A Elfetoh
OBJECTIVES: Transcranial magnetic stimulation is a non-invasive method of stimulating the brain that is increasingly being used in neuropsychiatric research. Previous work has suggested that the pathophysiology of obsessive-compulsive disorder (OCD) may involve dysfunction of excitatory and/or inhibitory brain function. This study aimed to extend those findings. METHODS: The study included 45 OCD patients and 15 age- and sex-matched healthy volunteers. Clinical evaluation was conducted using the Yale-Brown Obsessive-Compulsive Scale (Y-BOCS), Hamilton Anxiety Rating Scale (HAM-A), and Clinical Global Impression rating scale (CGI)...
April 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Huagang Zhang, Shuo Zhang, Nan Zhang, Dongsheng Fan
We investigated electromyography (EMG) of the sternocleidomastoid (SCM) in 128 patients with amyotrophic lateral sclerosis (ALS) including correlation with forced vital capacity (FVC) and ALS Functional Rating Scale scores. The presence of fibrillation potentials and positive sharp waves in the SCM was significantly more frequently observed in patients with an FVC <80% (31/49, 63%) than in patients with an FVC≥80% (34/79, 43%). This study suggests that the SCM could be concomitantly involved with primary respiratory muscles in ALS...
April 2016: Neurophysiologie Clinique, Clinical Neurophysiology
Angelo Insola, Paolo Mazzone, Massimiliano Valeriani
No abstract text is available yet for this article.
February 23, 2016: Neurophysiologie Clinique, Clinical Neurophysiology
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