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

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https://www.readbyqxmd.com/read/28073643/corrigendum-to-intracortical-inhibition-abnormality-during-the-remission-phase-of-multiple-sclerosis-is-related-to-upper-limb-dexterity-and-lesions-clin-neurophysiol-127-2016-1503-1511
#1
Julia C Nantes, Jidan Zhong, Scott A Holmes, Benjamin Whatley, Sridar Narayanan, Yves Lapierre, Douglas L Arnold, Lisa Koski
No abstract text is available yet for this article.
January 7, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28068522/motor-evoked-potential-gain-is-a-helpful-test-for-the-detection-of-corticospinal-tract-dysfunction-in-amyotrophic-lateral-sclerosis
#2
Y Duclos, A M Grapperon, E Jouve, R Truillet, C Zemmour, A Verschueren, J Pouget, S Attarian
OBJECTIVE: The detection of upper motor neuron (UMN) dysfunction is necessary for the diagnosis of amyotrophic lateral sclerosis (ALS). However, signs of UMN dysfunction may be difficult to establish. This study aimed to determine whether motor-evoked potential (MEP) gain (MEP area/background electromyographic activity) represents an efficient alternative to assess UMN dysfunction. METHODS: MEP area, MEP/compound muscle action potential (CMAP) area ratio, and MEP gain were tested at different force levels in healthy control subjects and ALS patients...
December 23, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28063789/co-occurrence-of-high-frequency-oscillations-and-delayed-responses-evoked-by-intracranial-electrical-stimulation-in-stereo-eeg-studies
#3
Cristian Donos, Ioana Mîndruţă, Mihai Dragoş Malîia, Alin Raşină, Jean Ciurea, Andrei Barborica
OBJECTIVE: To perform a side-by-side comparison of two epileptogenicity biomarkers, high frequency oscillations (HFOs) and delayed responses (DRs), as a result of single-pulse electrical stimulation. METHODS: We have recorded stimulation-evoked HFOs and DRs in 16 epileptic patients undergoing presurgical evaluation using the stereoelectroencephalographic method. To evaluate converging and complementary information provided by the biomarkers, we analyzed them individually and for logical "and"/"or" combinations between them...
December 18, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28063321/clinical-implication-of-cervical-vestibular-evoked-myogenic-potentials-in-benign-paroxysmal-positional-vertigo
#4
Mun Young Chang, Ji Ho Shin, Kyung Hyun Oh, Young Ho Hong, Seog-Kyun Mun
OBJECTIVES: To evaluate the value of cervical vestibular evoked myogenic potential (cVEMP) as a prognostic factor for benign paroxysmal positional vertigo (BPPV). METHODS: We reviewed 65 patients with BPPV who underwent cVEMP. Patients were divided into two groups according to resistance to the repositioning maneuver. Univariable and multivariable analyses were performed with age, gender, affected semicircular canal, affected side and cVEMP parameters to find the associated factors for resistance to the repositioning maneuver...
December 18, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28063320/saccades-abnormalities-in-posterior-cortical-atrophy-a-case-report
#5
LETTER
Yasuo Terao, Hideki Fukuda, Shin-Ichi Tokushige, Satomi Inomata-Terada, Masashi Hamada, Yoshikazu Ugawa
No abstract text is available yet for this article.
December 18, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28056389/altered-visual-contrast-gain-control-is-sensitive-for-idiopathic-generalized-epilepsies
#6
Daehan Won, Wonsuk Kim, W Art Chaovalitwongse, Jeffrey J Tsai
OBJECTIVE: Visual hyperexcitability in the form of abnormal contrast gain control has been shown in photosensitive epilepsy and idiopathic generalized epilepsies. We assessed the accuracy and reliability of measures of visual contrast gain control in discerning individuals with idiopathic generalized epilepsies from healthy controls. METHODS: Twenty-four adult patients with idiopathic generalized epilepsy and 32 neurotypical control subjects from two study sites participated in a prospective, cross-sectional study...
December 18, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28056388/aberrant-temporal-behavior-of-mismatch-negativity-generators-in-schizophrenia-patients-and-subjects-at-clinical-high-risk-for-psychosis
#7
Minah Kim, Kang Ik Kevin Cho, Youngwoo Bryan Yoon, Tae Young Lee, Jun Soo Kwon
OBJECTIVE: Although disconnection syndrome has been considered a core pathophysiologic mechanism of schizophrenia, little is known about the temporal behavior of mismatch negativity (MMN) generators in individuals with schizophrenia or clinical high risk (CHR) for psychosis. METHODS: MMN was assessed in 29 schizophrenia patients, 40 CHR subjects, and 47 healthy controls (HCs). Individual realistic head models and the minimum L2 norm algorithm were used to generate a current source density (CSD) model of MMN...
December 18, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28043769/motor-unit-number-index-munix-detects-motor-neuron-loss-in-pre-symptomatic-muscles-in-amyotrophic-lateral-sclerosis
#8
Christoph Neuwirth, Paul E Barkhaus, Christian Burkhardt, José Castro, David Czell, Mamede de Carvalho, Sanjeev Nandedkar, Erik Stålberg, Markus Weber
OBJECTIVE: Motor Unit Number Index (MUNIX) is a quantitative neurophysiological measure that provides an index of the number of lower motor neurons supplying a muscle. It reflects the loss of motor neurons in patients with Amyotrophic Lateral Sclerosis (ALS). However, it is unclear whether MUNIX also detects motor unit loss in strong, non-wasted muscles. METHODS: Three centres measured MUNIX in 49 ALS patients every three months in six different muscles (abductor pollicis brevis, abductor digiti minimi, biceps brachii, tibialis anterior, extensor digitorum brevis, abductor hallucis) on the less affected side...
December 18, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28042993/congenital-zika-virus-infection-the-tropical-asian-perspective
#9
LETTER
Beuy Joob, Viroj Wiwanitkit
No abstract text is available yet for this article.
December 18, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28065594/a-new-technology-a-new-application-and-the-road-ahead
#10
EDITORIAL
Seward B Rutkove
No abstract text is available yet for this article.
December 16, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28043771/a-tms-high-density-eeg-paradigm-for-genetic-generalized-epilepsy-a-new-diagnostic-and-prognostic-tool
#11
EDITORIAL
Fabio Ferrarelli
No abstract text is available yet for this article.
December 16, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28042996/individual-difference-in-%C3%AE-band-corticomuscular-coherence-and-its-relation-to-force-steadiness-during-isometric-voluntary-ankle-dorsiflexion-in-healthy-humans
#12
Junichi Ushiyama, Junya Yamada, Meigen Liu, Junichi Ushiba
OBJECTIVE: Magnitude of β-band coherent neural activities between the sensorimotor cortex and contracting muscle is known to vary across healthy individuals. To clarify how this variance affects actual motor function, this study examined associations between the corticomuscular coherence (CMC) and force steadiness. METHODS: CMC was calculated between scalp electroencephalograms (EEGs) over the sensorimotor cortex and surface electromyograms (EMGs) from the tibialis anterior muscle during tonic isometric voluntary ankle dorsiflexion at 30% of maximal effort in 22 healthy individuals...
December 7, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28042998/photosensitivity-in-dravet-syndrome-is-under-recognized-and-related-to-prognosis
#13
Nienke Verbeek, Dorothée Kasteleijn-Nolst Trenité, Merel Wassenaar, Jolien van Campen, Anja Sonsma, W Boudewijn Gunning, Al de Weerd, Nine Knoers, Willy Spetgens, Thea Gutter, Frans Leijten, Eva Brilstra
OBJECTIVE: To detect determinants for photoparoxysmal EEG response (PPR) in SCN1A-related Dravet syndrome (DS). METHODS: Data were studied from nationwide medical histories and EEGs of DS-patients (n=53; 31 males, age 2-19years). Detailed questionnaires on visual stimuli were completed by parents (n=49). RESULTS: PPR was found in 22 patients (42%; median age 1.25yr), and repeatedly in 17%. PPR (17% of 249 intermittent photic stimulation (IPS)-EEGs) occurred more often with optimal IPS protocols (OR 2...
December 6, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28043770/sleep-related-modifications-of-eeg-connectivity-in-the-sensory-motor-networks-in-huntington-disease-an-eloreta-study-and-review-of-the-literature
#14
Carla Piano, Claudio Imperatori, Anna Losurdo, Anna Rita Bentivoglio, Pietro Cortelli, Giacomo Della Marca
OBJECTIVE: To evaluate EEG functional connectivity in the sensory-motor network, during wake and sleep, in patients with Huntington Disease (HD). METHODS: 23 patients with HD and 23 age- and sex-matched healthy controls were enrolled. EEG connectivity analysis was performed by means of exact Low Resolution Electric Tomography (eLORETA). RESULTS: In wake, HD patients showed an increase of delta lagged phase synchronization (T=3.60; p<0.05) among Broadman's Areas (BA) 6-8 bilaterally; right BA 6-8 and right BA 1-2-3; left BA 1-2-3 and left BA 4...
December 5, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28042997/-standard-versus-nose-reference-electrode-placement-for-measuring-ovemps-with-air-conducted-sound-test-retest-reliability-and-preliminary-patient-results
#15
Laura Leyssens, Barbara Heinze, Bart Vinck, Angelique Van Ombergen, Robby Vanspauwen, Floris L Wuyts, Leen K Maes
OBJECTIVES: This study compared two electrode placements ('standard' versus 'nose reference' placement) for measuring oVEMPs, elicited by air-conducted 500Hz tone bursts. The test-retest reliability of both positions was evaluated and additionally both electrode placements were applied on a group of vestibular patients. METHODS: Eighteen healthy volunteers (range of 20-25years) participated in the first part and were retested after one week for evaluation of the test-retest reliability...
December 5, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28042995/can-electroencephalograms-provide-guidance-for-the-withdrawal-of-antiepileptic-drugs-a-meta-analysis
#16
Liwei Tang, Zheng Xiao
OBJECTIVE: The discontinuation of antiepileptic drugs (AEDs) is an important treatment decision for epilepsy patients who have been seizure-free for 2years or longer. Some patients experience seizures relapse after AED withdrawal. The prognostic value of electroencephalograms (EEGs) for seizure relapse following AED withdrawal is controversial. To our knowledge, this is the first meta-analysis to address whether EEG data can be used to guide the discontinuation of AEDs. METHOD: We performed a meta-analysis of cohort studies that reported original EEG data from before AED withdrawal and recurrence after AED-withdrawal...
December 5, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28042994/assessing-neuromuscular-junction-stability-from-stimulated-emg-in-children
#17
Matthew C Pitt, John C Mchugh, Jacquie Deeb, Ralph A Smith
OBJECTIVE: We present our 9-year experience of stimulated EMG potential analysis using concentric electrodes (SPACE) to evaluate neuromuscular junction (NMJ) disorders in awake children. The technique uses high frequency filtration of stimulated motor unit potentials and applies peak detection software to estimate mean consecutive difference (MCD). METHODS: SPACE was carried out in orbicularis oculi of 878 children (377 girls; median age 47months) between 2007 and 2015, stimulating the facial nerve with a monopolar cathode...
December 3, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/27940046/electrical-impedance-myography-for-discriminating-traumatic-peripheral-nerve-injury-in-the-upper-extremity
#18
Zhao Li, Dong Tian, Lingfen Chen, Xiaoqing Wang, Lijuan Jiang, Yude Yu
OBJECTIVE: To evaluate the potential of electrical impedance myography (EIM), which is sensitive to the changes in muscle structure and physiology, in discriminating traumatic peripheral nerve injury (TPNI) in the upper extremity. To identify factors that primarily influence muscle atrophy secondary to nerve injury. METHODS: Thirty-nine patients with TPNI underwent EIM measurement and standard electromyography tests for multiple muscles in the upper extremity. The side-to-side differences in EIM parameters were calculated for each subject and compared with the compound motor action potential (CMAP) amplitude, which is a measure of injury severity, and the time since injury...
November 25, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28007469/tms-combined-with-eeg-in-genetic-generalized-epilepsy-a-phase-ii-diagnostic-accuracy-study
#19
Vasilios K Kimiskidis, Alkiviadis Tsimpiris, Philippe Ryvlin, Reetta Kalviainen, Michalis Koutroumanidis, Antonio Valentin, Nikolaos Laskaris, Dimitris Kugiumtzis
OBJECTIVES: (A) To develop a TMS-EEG stimulation and data analysis protocol in genetic generalized epilepsy (GGE). (B) To investigate the diagnostic accuracy of TMS-EEG in GGE. METHODS: Pilot experiments resulted in the development and optimization of a paired-pulse TMS-EEG protocol at rest, during hyperventilation (HV), and post-HV combined with multi-level data analysis. This protocol was applied in 11 controls (C) and 25 GGE patients (P), further dichotomized into responders to antiepileptic drugs (R, n=13) and non-responders (n-R, n=12)...
November 24, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/27836429/functional-and-effective-brain-connectivity-for-discrimination-between-alzheimer-s-patients-and-healthy-individuals-a-study-on-resting-state-eeg-rhythms
#20
Katarzyna J Blinowska, Franciszek Rakowski, Maciej Kaminski, Fabrizio De Vico Fallani, Claudio Del Percio, Roberta Lizio, Claudio Babiloni
OBJECTIVE: This exploratory study provided a proof of concept of a new procedure using multivariate electroencephalographic (EEG) topographic markers of cortical connectivity to discriminate normal elderly (Nold) and Alzheimer's disease (AD) individuals. METHOD: The new procedure was tested on an existing database formed by resting state eyes-closed EEG data (19 exploring electrodes of 10-20 system referenced to linked-ear reference electrodes) recorded in 42 AD patients with dementia (age: 65...
October 22, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
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