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

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https://www.readbyqxmd.com/read/28520633/insular-cortex-surgery-for-the-treatment-of-refractory-epilepsy
#1
Marec von Lehe, Yaroslav Parpaley
Focal epilepsy originating from the insular cortex is rare. One reason is the small amount of cortical tissue compared with other lobes of the brain. However, the incidence of insular epilepsy might be underestimated because of diagnostic difficulties. The semiology and the surface EEG are often not meaningful or even misleading, and elaborated imaging might be necessary. The close connections of the insular cortex with other potentially epileptogenic areas, such as the temporal lobe or frontal/central cortex, is increasingly recognized as possible reason for failure of epilepsy surgery for temporal or extratemporal seizures...
May 16, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28520632/disruption-of-brain-heart-coupling-in-sepsis
#2
Marjolein M Admiraal, Emily J Gilmore, Michel J A M Van Putten, Hitten P Zaveri, Lawrence J Hirsch, Nicolas Gaspard
PURPOSE: To investigate heart rate and EEG variability and their coupling in patients with sepsis and determine their relationship to sepsis severity and severity of sepsis-associated brain dysfunction. METHODS: Fifty-two patients with sepsis were prospectively identified, categorized as comatose (N = 30) and noncomatose (N = 22), and compared with 11 control subjects. In a 30-minute EEG and electrocardiogram recording, heart rate variability and EEG variability (measured by the variability of relative power in a modified alpha band = RAP) and their coupled oscillations were quantified using linear (least-square periodogram and magnitude square coherence) and nonlinear (Shannon entropy and mutual information) measures...
May 16, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28520631/operculo-insular-epilepsy-scalp-and-intracranial-electroencephalographic-findings
#3
Ariel Levy, Thi Phuoc Yen Tran, Olivier Boucher, Alain Bouthillier, Dang Khoa Nguyen
PURPOSE: Operculo-insular seizures are heterogeneous and may resemble seizures originating from the temporal, frontal, or parietal lobe. Although surface and invasive EEG recordings are often necessary to detect operculo-insular seizures, electrophysiological features of operculo-insular epilepsies remain poorly characterized. This study describes the EEG findings of patients with operculo-insular epilepsy. METHODS: We reviewed electrophysiological data of all patients (n = 9) with operculo-insular seizures revealed by intracranial EEG and for whom operculo-insular epilepsy was confirmed by good seizure outcome after resective or radiosurgery at our center between 2005 and 2013...
May 16, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28520630/diagnostic-yield-of-routine-electroencephalography-with-concurrent-video-recording-in-detecting-interictal-epileptiform-discharges-in-relation-to-reasons-for-request-a-prospective-study-of-1-080-video-electroencephalograms
#4
Laia Grau-López, Marta Jiménez, Jordi Ciurans, Sonia Barambio, Alejandra Fumanal, Juan L Becerra
PURPOSE: The aim of this study was to prospectively analyze the sensitivity and specificity of routine electroencephalography with concurrent video recording (vEEG) in relation to the reasons for requesting the test and to investigate when routine vEEG should be requested. METHODS: We prospectively analyzed 1,080 consecutive vEEGs performed between April 2015 and April 2016. The requests for vEEG were classified as requests with a low suspicion of epilepsy (syncope, confusion or delirium, suspicion of psychogenic nonepileptic seizures, and paroxysmal focal neurological deficit) or requests with a high suspicion of epilepsy (first clinical seizure, suspected status epilepticus, follow-up study of a patient with epilepsy, and acute symptomatic seizures)...
May 16, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28445179/a-question-worth-asking
#5
Iván Sánchez Fernández, Tobias Loddenkemper
No abstract text is available yet for this article.
April 25, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28445178/familial-hemiplegic-migraine-with-asymmetric-encephalopathy-secondary-to-atp1a2-mutation-a-case-series
#6
Olwen C Murphy, Aine Merwick, Olivia OʼMahony, Aisling M Ryan, Brian McNamara
INTRODUCTION: Familial hemiplegic migraine (FHM) is a genetic disease with a variable clinical phenotype. The imaging and electroencephalogram (EEG) correlates of FHM are not well described. CASE SERIES: We describe a case series of five young women aged 12 to 32 years. Each case presented with headache, encephalopathy, and hemiparesis of varying severity. One patient developed seizures. All patients improved spontaneously. INVESTIGATIONS: Asymmetric slow-wave activity was seen on electroencephalogram in each case...
April 25, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28430674/continuous-eeg-in-pediatric-critical-care-yield-and-efficiency-of-seizure-detection
#7
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/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
#8
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
#9
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
#10
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/28471950/comparison-of-sleep-latency-and-number-of-soremps-in-the-home-and-hospital-with-a-modified-multiple-sleep-latency-test-a-randomized-crossover-study
#11
Kornelia K Beiske, Trond Sand, Eyvind Rugland, Knut Stavem
PURPOSE: Comparison of mean sleep latencies and number of sleep-onset rapid eye movement periods (SOREMPs) between modified multiple sleep latency test (MSLT) performed in the unattended home and in-hospital laboratory setting. METHODS: A randomized crossover single-blinded design. Thirty-four subjects referred to MSLT for suspected hypersomnia or narcolepsy were included. Participants were randomized to perform modified MSLT in the unattended home or in the hospital first...
May 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28463934/occipito-frontal-sharp-waves-an-under-recognized-electroencephalogram-pattern-in-self-limited-idiopathic-childhood-focal-epilepsy
#12
Elaine Wyllie, Ahsan N V Moosa
We report four children who highlight the potentially under-recognized electroencephalogram pattern of bilaterally synchronous occipito-frontal sharp waves, which may occur in children with Panayiotopoulos type self-limited childhood epilepsy but may be easily confused with the patterns of symptomatic generalized epilepsy. Our patients were young, healthy children who had infrequent, predominantly nocturnal, fairly prolonged seizures characterized by altered consciousness, vomiting, and autonomic features, or in one case nocturnal secondary generalized tonic-clonic convulsion...
May 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28463933/brief-potentially-ictal-rhythmic-discharges-b-i-rds-in-noncritically-ill-adults
#13
Ji Yeoun Yoo, Lara V Marcuse, Madeline C Fields, Jillian L Rosengard, Maria Vittoria Traversa, Nicolas Gaspard, Lawrence J Hirsch
INTRODUCTION: Brief potentially ictal rhythmic discharges (B(I)RDs) have been described in neonates and critically ill adults, and their association with seizures has been demonstrated. Their significance in noncritically ill adults remains unclear. We aimed to investigate their prevalence, electrographic characteristics, and clinical significance. METHODS: We identified adult patients with B(I)RDs who received long-term EEG recordings either in the epilepsy monitoring unit or in the ambulatory setting...
May 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28059855/american-clinical-meg-society-acmegs-position-statement-2-the-value-of-magnetoencephalography-meg-magnetic-source-imaging-msi-in-noninvasive-presurgical-mapping-of-eloquent-cortices-of-patients-preparing-for-surgical-interventions
#14
Anto I Bagić, Susan M Bowyer, Heidi E Kirsch, Michael E Funke, Richard C Burgess
No abstract text is available yet for this article.
May 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27893495/integration-of-eeg-into-psychiatric-practice-a-step-toward-precision-medicine-for-autism-spectrum-disorder
#15
Ronald J Swatzyna, Jay D Tarnow, Robert P Turner, Alexandra J Roark, Erin K MacInerney, Gerald P Kozlowski
INTRODUCTION: Data from an EEG is not commonly used by psychiatrists to plan treatment and medication. However, EEG abnormalities such as isolated epileptiform discharges are found to be more prevalent in psychiatric patients, particularly those diagnosed with autism spectrum disorder (ASD). Most medications prescribed for ASD lower seizure threshold and increase side effects. Therefore, it may be prudent to order an EEG for ASD cases, especially those categorized as refractory. METHODS: The data set was obtained from a multidisciplinary practice that treats a wide variety of neuroatypical children and adolescent refractory patients...
May 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
#16
Betül Tepeli, Metin Karataş, Mehmet Coşkun, Oya Ümit Yemişçi
PURPOSE: 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)...
May 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27870646/ultrasound-guided-electrodes-for-conduction-studies-of-the-saphenous-nerve
#17
Maria E Evangelopoulos, Sebastian Humpert, Kai M Rösler
PURPOSE: Saphenous nerve conduction studies are difficult, because the nerve is hard to localize and evoked responses are small. Ultrasound imaging may assist in the accurate localization and optimal positioning of surface (SE) and needle electrodes (NE). METHODS: The study population included 39 subjects and was divided into two groups. Group A consisted of 20 healthy subjects, whereas group B of 19 patients with polyneuropathies. Orthodromic conduction was measured by distal supramaximal nerve stimulation...
May 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27861192/generation-of-repeater-f-waves-in-healthy-subjects
#18
Elisabeth Chroni, Dimitra Veltsista, Chris Papapaulou, Eftychia Trachani
PURPOSE: F waves identical in latency, size, and shape, known as repeater F waves, have been observed occasionally in normal motor conduction recordings. The purpose of this study was to examine the occurrence and characteristics of repeater F waves in healthy subjects under different testing conditions, aiming to selectively excite lower and higher threshold motor fibers. METHODS: Sessions of 40 traces were recorded from the ulnar nerve in 12 volunteers, applying/using supramaximal, submaximal stimuli (intensity able to elicit 30% and 60% of the maximum compound muscle action potential amplitude), and a collision technique...
May 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27832046/periodic-discharges-insight-from-magnetoencephalography
#19
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...
May 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27763965/evaluation-of-cognitive-function-when-hearing-one-s-own-name-in-patients-with-brain-injuries-in-early-developmental-stages
#20
Kaori Tamura, Takaaki Mizuba, Tsuyoshi Okamoto, Mayumi Matsufuji, Sachio Takashima, Keiji Iramina
PURPOSE: The level of residual cognitive function in patients with early brain injury is a key factor limiting rehabilitation and the quality of life. Although understanding residual function is necessary for appropriate rehabilitation, the extent of its effects on cognitive improvement remains unknown. This study evaluated cognitive function in patients with severe motor and intellectual disabilities after early brain injuries due to cerebral hemorrhage or periventricular leukomalacia...
May 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
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