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Neurophysiologie Clinique, Clinical Neurophysiology

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https://www.readbyqxmd.com/read/29784540/recommendations-for-the-use-of-electroencephalography-and-evoked-potentials-in-comatose-patients
#1
REVIEW
Nathalie André-Obadia, Julie Zyss, Martine Gavaret, Jean-Pascal Lefaucheur, Eric Azabou, Sébastien Boulogne, Jean-Michel Guérit, Aileen McGonigal, Philippe Merle, Véronique Mutschler, Lionel Naccache, Cécile Sabourdy, Agnès Trébuchon, Louise Tyvaert, Laurent Vercueil, Benjamin Rohaut, Arnaud Delval
Predicting the outcome of a comatose or poorly responsive patient is a major issue for intensive care unit teams, in order to give the most accurate information to the family and to choose the best therapeutic option. However, determining the level of cortical activity in patients with disorders of consciousness is a real challenge. Reliable criteria are required to help clinicians in the decision-making process, especially in the acute phase of coma. In this paper, we propose recommendations for recording and interpreting electroencephalography and evoked potentials in comatose patients based on the literature and the clinical experience of a group of neurophysiologists trained in the management of comatose patients...
May 18, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29754759/exercise-to-improve-diabetic-peripheral-neuropathy-an-additional-option
#2
EDITORIAL
Prashanth R J Vas, Kalliopi Pafili, Nikolaos Papanas
No abstract text is available yet for this article.
May 10, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29753579/a-reappraisal-of-pain-paired-associative-stimulation-suggesting-motor-inhibition-at-spinal-level
#3
Martine Gavaret, Samar S Ayache, Veit Mylius, Alaa Mhalla, Moussa A Chalah, Jean-Pascal Lefaucheur
OBJECTIVES: Paired associative stimulation (PAS) can modulate motor excitability and consists of delivering repeated pairs of peripheral sensory stimulation combined with transcranial magnetic stimulation (TMS) over the contralateral motor cortex. Our objective was to evaluate the effect of a PAS protocol using a painful stimulation. METHODS: Ten healthy volunteers underwent pain-PAS protocol consisting of 90 pairs of nociceptive stimulus over the right hand followed by an image-guided navigated TMS of the contralateral motor cortex, delivered at 0...
May 9, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29729894/the-cortical-excitability-profile-of-patients-with-the-g209a-snca-mutation-versus-patients-with-sporadic-parkinson-s-disease-a-transcranial-magnetic-stimulation-study
#4
Vasilios K Kimiskidis, Sotirios Papayiannopoulos, Kyriaki Sotirakoglou, Haralambos Karakasis, Zoe Katsarou, Dimitrios A Kazis, Vasileios Papaliagkas, Stylianos Gatzonis, Alexandros Papadimitriou, Georgios Hadjigeorgiou, Sevasti Bostanjopoulou
Mutations in the α-synuclein gene are a rare cause of Parkinson's disease. We investigated, by single-pulse TMS, the cortical excitability profile of nine α-synuclein patients in comparison with 24 idiopathic PD patients, subdivided into "akinetic" (n=17) and "tremor-dominant" (n=7) subgroups. The comparative assessment of rest motor threshold, active MEP and Silent Period Input/Output curves indicated that the cortical excitability of α-Synuclein patients is similar to patients with the "akinetic" form of PD...
May 2, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29685555/prevalence-of-benign-epileptiform-variants-during-initial-eeg-examination-in-french-military-aircrew
#5
Jonathan Monin, Estelle Pruvost-Robieux, Nicolas Huiban, Angela Marchi, Benoit Crepon, Dominique Dubourdieu, Eric Perrier, Martine Gavaret
INTRODUCTION: In France, a systematic EEG is performed during initial examination in military aircrew applicants, which may provide an estimation of the prevalence of benign epileptiform variants in healthy adults. METHODS: We analyzed standard EEG (21 scalp electrodes, 20minutes, 400Hz sampling rate) of military aircrew applicants examined in the French Main Aeromedical Center in 2016. EEGs were analyzed using both bipolar and referential montages. The collected data were EEG abnormalities and benign epileptiform variants...
April 20, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29631777/differential-modulation-of-prepulse-inhibition-of-the-blink-reflex-in-peripersonal-versus-extrapersonal-space
#6
Meral E Kızıltan, Oya Öztürk, Ayşegül Gündüz
OBJECTIVE: Threatening stimuli encountered in peripersonal space (PPS) are processed differently from those encountered in extrapersonal space (EPS). This phenomenon is attributed to tonic top-down modulation. We hypothesized that prepulse inhibition (PPI) of a reflex, which has a protective function, may change according to whether the conditioning stimulus appears in PPS or EPS. We aimed to compare the strength of the PPI according to whether stimulation was delivered in PPS or EPS...
April 6, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29631776/nerve-ultrasound-of-small-nerves-in-the-hand
#7
LETTER
Daniele Coraci, Silvia Giovannini, Claudia Loreti, Luca Padua
No abstract text is available yet for this article.
April 6, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29606548/consecutive-postural-adjustments-cpas-a-kinetic-analysis-of-variable-velocity-during-a-pointing-task
#8
Paul Fourcade, Simon Bouisset, Serge Le Bozec, Sahel Memari
AIM: This paper examines the postural adjustments that occur after the end of a voluntary movement (consecutive postural adjustments, CPAs). Its aim is to reinforce the theory that CPAs are necessary to counterbalance the destabilizing effect of a voluntary movement. In addition, we compared the main features of CPAs with those of anticipatory postural adjustments (APAs) in order to gather evidence that could afford new insights into postural programming. METHODS: Nine healthy adults were invited to adopt a sitting position to perform nine pointing movements at decreasing velocities...
March 29, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29606547/effect-of-aerobic-training-on-nerve-conduction-in-men-with-type-2-diabetes-and-peripheral-neuropathy-a-randomized-controlled-trial
#9
Farhad Gholami, Saeed Nikookheslat, Yaghoub Salekzamani, Normand Boule, Afshar Jafari
OBJECTIVE: Peripheral neuropathy (PN) is one of the long-term complications of diabetes. Few studies have investigated the role of regular exercise on diabetic PN. We examined the effect of aerobic training on nerve conduction velocity and action potential amplitude in the lower limbs of men with type 2 diabetes and PN. METHODS: In a randomized controlled study, 24 volunteers diagnosed with diabetic PN were randomly assigned to exercise or control groups. Aerobic training consisted of 20-45min walking or running at 50-70% of heart rate reserve for three sessions per week over 12weeks...
March 29, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29605507/developmental-dysgraphia-is-often-associated-with-minor-neurological-dysfunction-in-children-with-developmental-coordination-disorder-dcd
#10
Clémence Lopez, Cherhazad Hemimou, Bernard Golse, Laurence Vaivre-Douret
OBJECTIVES: Children with developmental coordination disorder (DCD) are particularly affected by handwriting disorders, which remain poorly understood and are not clearly defined. The aim of our study is to provide a better understanding of handwriting disorders, and specifically of dysgraphia in children with DCD. METHODS: Sixty-five children with DCD (5-15 years), enrolled according to DSM-5, were assessed with handwriting testing and standardized assessments of neuropsychological, neurovisual, MRI and neuropsychomotor functions, with special attention paid to muscular tone examination...
March 28, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29496378/prognostic-role-of-neurophysiological-testing-3-7-days-after-onset-of-acute-unilateral-bell-s-palsy
#11
Eman M Khedr, Noha Abo El-Fetoh, Dina H El-Hammady, Abeer M Ghandour, Khaled Osama, Ahmed F Zaki, Ayman Gamea
OBJECTIVE: Recovery from acute Bell's palsy (BP) is variable and there are few predictors of response. We evaluated the usefulness of a range of neurophysiological parameters to predict outcome in BP. METHODS: Fifty-nine patients (age: 33.7±15.4 years) with acute unilateral BP were recruited within 3-7 days of onset. They were evaluated with electroneurography, facial nerve excitability, and the blink reflex. House-Brackmann (HB) clinical scores were obtained at the same time and three months later...
April 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29482881/duration-but-not-intensity-influences-transcranial-direct-current-stimulation-tdcs-after-effects-on-cortical-excitability
#12
Philippe Vignaud, Marine Mondino, Emmanuel Poulet, Ulrich Palm, Jérôme Brunelin
Recent studies have shown heterogeneous results regarding the influence of intensity and duration of motor transcranial direct current stimulation (tDCS) on cortical excitability. In this pilot crossover study including 14 healthy participants, we compared the effects of a single session of anodal-tDCS set with two commonly used durations (20 and 30minutes) and intensities (1 and 2mA) on short-interval intracortical inhibition (SICI) and intracortical facilitation (ICF). Regardless of the current intensity, 20minutes of tDCS increased SICI (3ms inter-stimulus interval ISI) and decreased ICF (7ms ISI); 30minutes of tDCS did not affect cortical excitability...
April 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29415823/contribution-of-ultrasonography-to-the-evaluation-of-peripheral-nerve-disorders
#13
Simon Podnar
OBJECTIVE: Although ultrasonographic (US) visualization of peripheral nerves is becoming more and more frequently used, there are few studies on its actual contribution to the diagnosis and management of patients with peripheral nerve disorders. METHODS: The electronic records of consecutive patients referred to our US laboratory over an eight-month period were retrospectively analyzed. The contribution of US examination to patient management was evaluated. RESULTS: Two hundred and thirty one consecutive patients (43% men) were analyzed...
April 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29490884/repetitive-nerve-stimulation-and-jitter-measurement-with-disposable-concentric-needle-electrode-in-newly-diagnosed-myasthenia-gravis-patients
#14
Nermin Gorkem Sirin, Elif Kocasoy Orhan, Hacer Durmus, Feza Deymeer, Mehmet Baris Baslo
INTRODUCTION: The aim of this study was to define the diagnostic accuracy of concentric needle (CN)-jitter in newly diagnosed myasthenia gravis (MG) patients and to compare CN-jitter with repetitive nerve stimulation. METHODS: In 30 MG patients, repetitive nerve stimulation in 4 muscles (orbicularis oculi, nasalis, trapezius and abductor digiti minimi) and CN-jitter of extensor digitorum (ED) and frontalis muscles were evaluated. RESULTS: Twenty-eight of 30 patients (93%) had high jitter in at least one muscle...
February 25, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29352627/indications-and-limits-of-stereoelectroencephalography-seeg
#15
REVIEW
Lorella Minotti, Alexandra Montavont, Julia Scholly, Louise Tyvaert, Delphine Taussig
Epilepsy surgery is now an accepted treatment to achieve seizure control in carefully selected patients, both children and adults, suffering from drug-resistant focal epilepsy. Although surgical strategies can often be defined on the basis of non-invasive diagnostic procedures, and despite the recent advances in this field, an increasing number of more complex cases requires invasive EEG (iEEG) to provide precise information on the localization of the epileptogenic zone (EZ), its relationships with eloquent cortex (EC), and the feasibility of a tailored surgical resection...
February 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29289424/french-guidelines-on-stereoelectroencephalography-seeg-editorial-comment
#16
EDITORIAL
Patrick Chauvel, Sylvain Rheims, Aileen McGonigal, Philippe Kahane
No abstract text is available yet for this article.
February 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29289423/interpretation-of-seeg-recordings
#17
REVIEW
Fabrice Bartolomei, Anca Nica, Maria Paola Valenti-Hirsch, Claude Adam, Marie Denuelle
The interpretation of SEEG recordings is a crucial step. It must be carried out by an epileptologist/neurophysiologist with sufficient training and qualification in this field. The objectives of the interpretation are to define the brain topography of interictal activities (irritative zone) and the epileptogenic zone, defined as the site of primary organization of ictal discharges. Several patterns of seizure onset are possible, the most typical including fast discharges. The interpretation of the SEEG is based on the recording of spontaneous activity but also on the results of intracerebral electrical stimulation...
February 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29277357/french-guidelines-on-stereoelectroencephalography-seeg
#18
REVIEW
Jean Isnard, Delphine Taussig, Fabrice Bartolomei, Pierre Bourdillon, Hélène Catenoix, Francine Chassoux, Mathilde Chipaux, Stéphane Clémenceau, Sophie Colnat-Coulbois, Marie Denuelle, Stéphane Derrey, Bertrand Devaux, Georg Dorfmüller, Vianney Gilard, Marc Guenot, Anne-Sophie Job-Chapron, Elisabeth Landré, Axel Lebas, Louis Maillard, Aileen McGonigal, Lorella Minotti, Alexandra Montavont, Vincent Navarro, Anca Nica, Nicolas Reyns, Julia Scholly, Jean-Christophe Sol, William Szurhaj, Agnès Trebuchon, Louise Tyvaert, Maria Paola Valenti-Hirsch, Luc Valton, Jean-Pierre Vignal, Paul Sauleau
Stereoelectroencephalography (SEEG) was designed and developed in the 1960s in France by J. Talairach and J. Bancaud. It is an invasive method of exploration for drug-resistant focal epilepsies, offering the advantage of a tridimensional and temporally precise study of the epileptic discharge. It allows anatomo-electrical correlations and tailored surgeries. Whereas this method has been used for decades by experts in a limited number of European centers, the last ten years have seen increasing worldwide spread of its use...
February 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29273384/surgical-technique
#19
REVIEW
Marc Guénot, Axel Lebas, Bertrand Devaux, Sophie Colnat-Coulbois, Georg Dorfmuller, Aileen McGonigal, Nicolas Reyns, Vianney Gilard, Stéphane Derrey, Jean-Christophe Sol, Stéphane Clémenceau
In SEEG, as for any surgical procedure, the benefit/risk ratio is a key-point. This implies rigorous clinical practice in terms of indication, information delivered to the patient, and surgical technique. Numerous technical options may be used to achieve this goal. All are valuable, as long as they are executed with rigor and consistency. Intracranial bleeding represents the main risk of the procedure (1-4% of cases). The procedure also carries a risk of infection (0.8%), death (total of 6 reported cases in all the literature, <0...
February 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29273383/seeg-guided-radiofrequency-thermocoagulation
#20
REVIEW
Pierre Bourdillon, Bertrand Devaux, Anne-Sophie Job-Chapron, Jean Isnard
We propose expert recommendations on the use of SEEG-guided radiofrequency thermocoagulation (RF-TC) based on an exhaustive literature review. This technique consists in performing a RF-TC lesion using a SEEG depth electrode at the end of the recording. It is indicated when conventional surgical resection of the ictal onset zone is not possible. SEEG guided RF-TC can also be considered as a diagnostic tool since an improvement, even limited, has a high positive predictive value concerning the good outcome after surgery...
February 2018: Neurophysiologie Clinique, Clinical Neurophysiology
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