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Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society

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https://www.readbyqxmd.com/read/28430674/continuous-eeg-in-pediatric-critical-care-yield-and-efficiency-of-seizure-detection
#1
Arnold J Sansevere, Elizabeth D Duncan, Mark H Libenson, Tobias Loddenkemper, Phillip L Pearl, Robert C Tasker
PURPOSE: Our goal was to define the duration of continuous EEG (cEEG) monitoring needed to adequately capture electrographic seizures and EEG status epilepticus in the pediatric intensive care unit using clinical and background EEG features. METHODS: Retrospective study of patients aged 1 month to 21 years admitted to a tertiary pediatric intensive care unit and undergoing cEEG (>3 hours). Clinical data collected included admission diagnosis, EEG background features, and time variables including time to first seizure after initiation of cEEG...
April 20, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27893494/a-comparison-of-magnetic-resonance-imaging-and-electroneuromyography-for-denervated-muscle-diagnosis
#2
Betül Tepeli, Metin Karataş, Mehmet Coşkun, Oya Ümit Yemişçi
INTRODUCTION: The aim of this study was to evaluate the diagnostic value of magnetic resonance imaging (MRI) for muscle denervation due to focal lesions of the median nerve and to compare electrophysiological findings with MRI findings. METHODS: Twenty-six patients with electrophysiological studies diagnosed for focal lesions of the median nerve were included in this study. Electrophysiological studies and MRI were conducted on 34 patients' hands. Patients' hands were divided into two groups based on edema findings revealed by the MRI: group 1 (edema-negative group; n = 24) and group 2 (edema-positive group; n = 10)...
April 10, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27832046/periodic-discharges-insight-from-magnetoencephalography
#3
Vladimir Shvarts, Gabor Zoltay, Susan M Bowyer, Andrew Zillgitt, John E Moran, Karen Mason, Norman Tepley, David Burdette
PURPOSE: This study used magnetoencephalography (MEG) dipole localization and coherence measurement to evaluate the magnetic fields associated with periodic discharges. The primary goal of the study was to evaluate whether MEG could consistently localize quasiperiodic discharges that were observed on the EEG portion of the recording. The secondary objective was to evaluate whether coherence measurements would correlate with topographic maxima of epileptiform activity. METHODS: A total of 13 inpatients, whose electrographic records demonstrated lateralized periodic discharges (LPDs), were recruited from Henry Ford Hospital neurology and intensive care units...
March 28, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28323659/stimulus-induced-rhythmic-periodic-or-ictal-discharges-in-coma-incidence-and-interrater-reliability-of-continuous-eeg-after-a-standard-stimulation-protocol-a-prospective-study
#4
Khalid A Alsherbini, Joao Mc-OʼNeil Plancher, David M Ficker, Brandon P Foreman, Opeolu M Adeoye, Jun Ying, Michael D Privitera
PURPOSE: Stimulus-induced rhythmic, periodic, or ictal discharges (SIRPIDs) are often seen during continuous electroencephalographic (cEEG) monitoring in coma. Given their uncertain clinical significance, our prospective study evaluated incidence of SIRPIDs in comatose patients in the neuroscience intensive care unit (NSICU) who underwent a standard stimulation protocol and defined interreader reliability for cEEG. METHODS: Of 146 patients prospectively screened who underwent cEEG during a 6-month period, 53 patients were included and 93 patients were excluded...
March 17, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28306692/carpal-tunnel-syndrome-grading-using-high-resolution-ultrasonography
#5
Hala R El Habashy, Reem A El Hadidy, Sandra M Ahmed, Basma B El Sayed, Aya S Ahmed
PURPOSE: Carpal tunnel syndrome (CTS) is a common entrapment neuropathy of the wrist. The diagnosis of CTS has been a concern for physicians for a long time. The aim of this study is to evaluate the use of the median nerve (MN) cross-sectional area (CSA) in the wrist compared with the CSA in the forearm to grade the severity of CTS in Egyptian patients. METHODS: The CSAs of the MN in the wrist and forearm were measured in 72 wrists that were diagnosed with CTS via nerve conduction studies and 80 healthy wrists...
March 16, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28306691/predictive-value-of-electrocorticography-in-patients-with-mesial-temporal-lobe-epilepsy-undergoing-selective-amygdalohippocampectomy
#6
Aline Herlopian, Bashir Shihabuddin
PURPOSE: The utility of intraoperative electrocorticography has been reported in predicting seizure outcome in patients with mesial temporal lobe epilepsy due to mesial temporal sclerosis (MTS) undergoing standard temporal lobectomy. Three studies reported the predictive outcome in patients with MTS undergoing selective amygdalohippocampectomy (sAHE). We evaluate the predictive value of the intraoperative electrocorticography in postoperative outcome in patients with mesial temporal lobe epilepsy secondary to MTS undergoing sAHE...
March 16, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28166083/electrographic-features-of-lateralized-periodic-discharges-stratify-risk-in-the-interictal-ictal-continuum
#7
Christopher R Newey, Pradeep Sahota, Stephen Hantus
PURPOSE: To risk-stratify electrographic features of lateralized periodic discharges (LPDs) in acute structural brain lesions for predictors of electrographic seizures. METHODS: This is a retrospective review of 100 consecutive patients with LPDs. Epileptiform features of LPDs were described based on electrographic features: blunt delta morphology, sharply contoured, overlying fast frequencies, and/or rhythmicity (loss of interdischarge interval lasting ≥1 second)...
January 30, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27930420/performance-of-spectrogram-based-seizure-identification-of-adult-eegs-by-critical-care-nurses-and-neurophysiologists
#8
Edilberto Amorim, Craig A Williamson, Lidia M V R Moura, Mouhsin M Shafi, Nicolas Gaspard, Eric S Rosenthal, Mary M Guanci, Venkatakrishna Rajajee, M Brandon Westover
PURPOSE: Continuous EEG screening using spectrograms or compressed spectral arrays (CSAs) by neurophysiologists has shorter review times with minimal loss of sensitivity for seizure detection when compared with visual analysis of raw EEG. Limited data are available on the performance characteristics of CSA-based seizure detection by neurocritical care nurses. METHODS: This is a prospective cross-sectional study that was conducted in two academic neurocritical care units and involved 33 neurointensive care unit nurses and four neurophysiologists...
January 25, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28257341/decreased-axon-flare-reaction-to-electrical-stimulation-in-patients-with-chronic-demyelinating-inflammatory-polyneuropathy
#9
Panagiotis Kokotis, Martin Schmelz, Aikaterini E Papagianni, Thomas Zambelis, Nikos Karandreas
PURPOSE: In chronic inflammatory demyelinating polyradiculopathy (CIDP), the impairment of unmyelinated nerve fibers appears unexpected. The measurement of the electrically induced axon flare reflex is a clinical test to assess the peripheral C-nociceptor function. In this study, we compared the flare area in patients suffering from CIDP with healthy subjects. METHODS: We examined 18 patients fulfilling the criteria for CIDP (11 men, mean age 51.8 years, SD 15.1) and 18 age-matched adult healthy volunteers (control group) (11 men, mean age 51...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27753734/investigation-of-nerve-conduction-studies-of-carpal-tunnel-syndrome-cases-with-different-risk-factors-an-electrodiagnostic-study
#10
Volkan Solmaz, Selçuk Yavuz, Ahmet İnanr, Dürdane Aksoy, Elmas Pektaş, Aslan Tekataş, Semiha G Kurt
PURPOSE: The aim of this study was to determine whether there are electrodiagnostic differences between carpal tunnel syndrome (CTS) patients with diabetes mellitus, CTS + hypothyroidism (HT), CTS + fibromyalgia syndrome, CTS + rheumatoid arthritis (RA), and idiopathic CTS cases, by comparing nerve conduction studies. METHODS: This research examined electrophysiologic studies of 47 untreated HT + CTS, 47 diabetes mellitus + CTS, 49 RA + CTS, 52 fibromyalgia syndrome + CTS, 50 idiopathic CTS cases, and a healthy control group of 50 individuals (a total of 293 patients and 433 hands with CTS)...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27753733/cauda-equina-conduction-time-determined-by-f-waves-in-normal-subjects-and-patients-with-neurogenic-intermittent-claudication-caused-by-lumbar-spinal-stenosis
#11
Yasuaki Imajo, Tsukasa Kanchiku, Hidenori Suzuki, Masahiro Funaba, Norihiro Nishida, Kazuhiro Fujimoto, Toshihiko Taguchi
PURPOSE: Lumbar spinal stenosis typically presents with neurogenic intermittent claudication. The aim of this study was to investigate cauda equina conduction time (CECT) in patients with neurogenic intermittent claudication caused by lumbar spinal stenosis and its relationship with age and body height in normal subjects. METHODS: The study included 172 normal subjects (group C) (mean age 44.1 ± 16.6 years; mean height 163.7 ± 8.9 cm). Forty-seven patients (group L) (mean age 71...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27749617/pygopagus-conjoined-twins-a-neurophysiologic-intraoperative-monitoring-schema
#12
Barrett P Cromeens, Jennifer L McKinney, Jeffrey R Leonard, Lance S Governale, Judy L Brown, Christina M Henry, Marc A Levitt, Richard J Wood, Gail E Besner, Monica P Islam
Conjoined twins occur in up to 1 in 50,000 live births with approximately 18% joined in a pygopagus configuration at the buttocks. Twins with this configuration display symptoms and carry surgical risks during separation related to the extent of their connection which can include anorectal, genitourinary, vertebral, and neural structures. Neurophysiologic intraoperative monitoring for these cases has been discussed in the literature with variable utility. The authors present a case of pygopagus twins with fused spinal cords and imperforate anus where the use of neurophysiologic intraoperative monitoring significantly impacted surgical decision-making in division of these critical structures...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27749616/a-randomized-prospective-comparison-of-ultrasound-guided-and-landmark-guided-steroid-injections-for-carpal-tunnel-syndrome
#13
Fariba Eslamian, Bina Eftekharsadat, Arash Babaei-Ghazani, Fateme Jahanjoo, Mojgan Zeinali
PURPOSE: The aim of this study was to compare the clinical and electrodiagnostic efficacy of ultrasound (US)-guided versus landmark (LM)-guided steroid injections in patients with carpal tunnel syndrome (CTS). METHODS: This randomized clinical trial included 47 patients (60 affected hands) with moderate CTS (30 hands in each group). All clinically suspected patients with CTS who met the inclusion criteria confirmed by electrodiagnostic tests were enrolled. The subjects received 40 mg of methylprednisolone either with the US-guide or the LM-guided injection technique...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27749615/quantification-of-chronic-oxaliplatin-induced-hypesthesia-in-two-areas-of-the-hand
#14
Mihary Andriamamonjy, Jean-Baptiste Delmotte, Francesco Savinelli, Hélène Beaussier, François Coudoré
PURPOSE: Oxaliplatin is a platinum derivate widely used in cancer treatment but producing dose-limiting peripheral neurotoxicity. Acute neuropathy is characterized by a transient cold-induced distal allodynia, whereas chronic neuropathy leads to sensory loss. To design a method for quantitative assessment of oxaliplatin-induced peripheral neuropathy, we developed a study that aims to characterize the most appropriate skin area of the hand to perform sensory tests. METHODS: We included patients treated for at least 6 months with oxaliplatin...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27749505/a-survey-of-neurophysiology-fellows-in-the-united-states
#15
Zulfi Haneef, Sharon Chiang, Holly C Rutherford, Arun R Antony
PURPOSE: Fellowship training in Clinical Neurophysiology (CNP) is often sought following Neurology residency. However, data documenting the reasons for choosing CNP fellowship, and experiences therein, are sparse. METHODS: Current Neurophysiology fellows across the United States participated in a 17-item, Internet-based survey. Data regarding demographics, reasons for choosing fellowship, adequacy of training, and future plans were collected. RESULTS: Among respondents (n = 49), 84% graduated from a US medical school...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27662336/characteristics-of-eeg-interpreters-associated-with-higher-interrater-agreement
#16
Jonathan J Halford, Amir Arain, Giridhar P Kalamangalam, Suzette M LaRoche, Bonilha Leonardo, Maysaa Basha, Nabil J Azar, Ekrem Kutluay, Gabriel U Martz, Wolf J Bethany, Chad G Waters, Brian C Dean
PURPOSE: The goal of the project is to determine characteristics of academic neurophysiologist EEG interpreters (EEGers), which predict good interrater agreement (IRA) and to determine the number of EEGers needed to develop an ideal standardized testing and training data set for epileptiform transient (ET) detection algorithms. METHODS: A three-phase scoring method was used. In phase 1, 19 EEGers marked the location of ETs in two hundred 30-second segments of EEG from 200 different patients...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27584547/correlation-between-the-revised-brain-symmetry-index-an-eeg-feature-index-and-short-term-prognosis-in-acute-ischemic-stroke
#17
Xiyan Xin, Jingling Chang, Ying Gao, Yongmei Shi
PURPOSE: The present study aims to investigate the correlation between EEG features and short-term prognosis in patients who have experienced an acute ischemic stroke. METHODS: The present study included 29 patients who had experienced an acute ischemic stroke and were treated at the Beijing Dongzhimen Hospital affiliated with Beijing University of Chinese Medicine between January 2010 and January 2012. Patients were evaluated using the revised Brain Symmetry Index (r-BSI), National Institutes of Health Stroke Scale, and Glasgow Coma Scale...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27574957/efficacy-of-head-repositioning-in-restoration-of-electrophysiological-signals-during-cervical-spine-procedures
#18
Shmuel Appel, Akiva Korn, Tali Biron, Kobi Goldstein, Nahshon Rand, Michael Millgram, Yizhar Floman, Ely Ashkenazi
PURPOSE: To evaluate the frequency of loss of neurophysiological potentials during head positioning, the usefulness of head repositioning to restore the potentials, and the effect on neurological outcome. METHODS: We retrospectively reviewed consecutive cervical spine surgeries performed at the Israel Spine Center, Assuta Medical Center, during 2006 to 2013. Surgeries performed with neuromonitoring (transcranial-electric motor evoked potentials, somatosensory evoked potentials, electromyographic recordings) were included...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27571047/utility-of-clinical-features-for-the-diagnosis-of-seizures-in-the-intensive-care-unit
#19
Sarah E Schmitt
PURPOSE: Seizures in the intensive care unit are often subtle, and may have little or no clinical correlate. This study attempts to determine what clinical features are most strongly associated with the presence of electrographic seizures on continuous EEG (cEEG) monitoring. METHODS: A retrospective review for all patients who underwent cEEG monitoring between January 2003 and March 2009 for either characterization of clinical events or altered mental status was performed...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27560305/compound-muscle-action-potential-decrement-to-repetitive-nerve-stimulation-between-hirayama-disease-and-amyotrophic-lateral-sclerosis
#20
Chaojun Zheng, Dongqing Zhu, Feizhou Lu, Yu Zhu, Xiaosheng Ma, Xinlei Xia, Robert Weber, Jianyuan Jiang
PURPOSE: To compare repetitive nerve stimulation (RNS) between Hirayama disease (HD) and amyotrophic lateral sclerosis (ALS). METHODS: The 3-Hz RNS test was performed on bilateral abductor pollicis brevis, abductor digiti minimi, middle deltoid, and upper trapezius muscles in 33 HD patients and 37 ALS patients. RESULTS: In HD patients, none of tested muscles showed any abnormal decrements (≥10%). Significant decrements were observed in 73% of the ALS patients, and decrements were more frequently observed in proximal muscles (deltoid: 70...
March 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
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