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

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https://www.readbyqxmd.com/read/28914659/relationship-between-alpha-rhythm-and-the-default-mode-network-an-eeg-fmri-study
#1
Anthony D Bowman, Joseph C Griffis, Kristina M Visscher, Allan C Dobbins, Timothy J Gawne, Mark W DiFrancesco, Jerzy P Szaflarski
PURPOSE: Reports of the relationship between the default mode network (DMN) and alpha power are conflicting. Our goal was to assess this relationship by analyzing concurrently obtained EEG/functional MRI data using hypothesis-independent methods. METHODS: We collected functional MRI and EEG data during eyes-closed rest in 20 participants aged 19 to 37 (10 females) and performed independent component analysis on the functional MRI data and a Hamming-windowed fast Fourier transform on the EEG data...
September 13, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28914658/are-the-sensory-fibers-of-the-ulnar-nerve-affected-in-carpal-tunnel-syndrome
#2
Özgür Selek, Murat Alemdar
PURPOSE: Distribution of paresthesia throughout the skin area without median nerve innervation is frequently seen in carpal tunnel syndrome (CTS). However, its pathophysiologic mechanisms are still unclear. We aimed to research whether a dysfunction in sensory fibers of the ulnar nerve (UN) was present or not in hands with CTS. METHODS: Totally, upper extremity nerve conduction study recordings of 508 patients were considered. After exclusions, 331 upper extremity recordings of 277 patients were included...
September 12, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28914657/hearing-protective-devices-should-be-used-by-recipients-of-repetitive-transcranial-magnetic-stimulation
#3
Robert L Folmer, Sarah M Theodoroff
No abstract text is available yet for this article.
September 11, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28914656/charcot-marie-tooth-disease-type-1a-influence-of-body-mass-index-on-nerve-conduction-studies-and-on-the-charcot-marie-tooth-examination-score
#4
Nivedita U Jerath, Michael E Shy
PURPOSE: Charcot-Marie-Tooth Disease type 1A (CMT1A) is caused by a duplication of the peripheral myelin protein gene 22 at chromosome 17p11.2-12. There is limited data regarding whether body mass index (BMI) affects electrophysiological or clinical data in those with CMT1A. METHODS: Electrophysiological data, the Charcot-Marie-Tooth examination score (CMTES) and BMI from 101 patients with known CMT1A were obtained and analyzed. RESULTS: When controlling for age, a higher BMI does not affect ulnar motor nerve conduction studies in those with CMT1A, but rather components of the CMTES (loss of pinprick and motor strength in the lower extremities)...
September 11, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28858905/electroencephalogram-abnormalities-during-positional-changes-in-brain-sagging-syndrome
#5
Benziger Bensam, Heustein L Sy, Nadia Sotudeh, Paulomi K Bhalla, Sean T Hwang, David E LeDoux
PURPOSE: Brain sagging after craniotomy and clipping of a ruptured aneurysm is a rare complication. Clinical and electrographic changes in patients with a final diagnosis of intracranial hypotension are not well described, and can be mistaken on rare occasions for other entities such as nonconvulsive status epilepticus. There may be resulting delay in the diagnosis and treatment of this potentially life-threatening disorder. METHODS: Case report and imaging. RESULTS: We present a case of intracranial hypotension in which concerning continuous electroencephalogram (cEEG) and quantitative EEG (qEEG) findings were noted during active sagging of the brain, which resolved with supine positioning...
August 30, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28800038/subclinical-rhythmic-eeg-discharge-of-adult-sreda-in-a-child-with-generalized-epilepsy-and-literature-review-of-sreda-in-children
#6
Marcie Goeden, Lalit R Bansal
Subclinical rhythmic discharges of adult (SREDA) is a rare benign EEG variant in adults and is of unknown clinical significance. Its occurrence in children is extremely rare. In review of the literature, it has been described in only four children. We present a case of a 10-year-old female with generalized idiopathic childhood absence epilepsy who is noted to have SREDA in three subsequent EEGs performed across a 25-month span. She had no clinical change with these discharges and it was believed to be a benign variant...
August 9, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28786834/electrocorticographic-patterns-in-epilepsy-surgery-and-long-term-outcome
#7
Daniel San-Juan, Mario Arturo Alonso-Vanegas, Carlos Trenado, Natalia Hernández-Segura, Dulce Anabel Espinoza-López, Brenda González-Pérez, Esmeralda Cobos-Alfaro, Héctor Zúñiga-Gazcón, María Del Carmen Fernández-González de Aragón, Axel Hernandez-Ruiz
PURPOSE: The role of intraoperative electrocorticography (iECoG) and of its patterns in epilepsy surgery have shown contradictory results. Our aim was to describe iECoG patterns and their association with outcome in epilepsy surgery. METHODS: We retrospectively analyzed 104 patients who underwent epilepsy surgery (2009-2015) with pre- and postresection iECoG. We described clinical findings, type of surgery, preresection iECoG patterns according to Palmini et al...
August 3, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28786833/utility-of-eeg-activation-procedures-in-epilepsy-a-population-based-study
#8
Elisa Baldin, W A Hauser, Jeffrey R Buchhalter, Dale C Hesdorffer, Ruth Ottman
PURPOSE: No previous population-based study has addressed the contribution of activation procedures to the yield of epileptiform abnormalities on serial EEGs. We assessed yield of activation-related epileptiform abnormalities and predictors of finding an activation-related abnormality with multiple EEGs in a population-based study of newly diagnosed epilepsy. METHODS: We used the resources of the Rochester Epidemiology Project to identify 449 residents of Rochester, Minnesota with a diagnosis of newly diagnosed epilepsy at age 1 year or older, between 1960 and 1994, who had at least one EEG...
August 3, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28742635/long-exercise-test-in-the-interattack-period-of-periodic-paralysis-a-useful-and-sensitive-diagnostic-tool
#9
Jiaoting Jin, Fangfang Hu, Min Li, Suhang Shang, Xing Qin, Hongmei Cao, Jingxia Dang
PURPOSE: The reference values of long exercise test are inconsistent in previous studies. Our research aims to determine the reference values and improve diagnostic efficiency of long exercise test in periodic paralysis. METHODS: In this study, 100 healthy controls, 35 non-periodic paralysis patients, and 47 patients with periodic paralysis were recruited. The procedures of long exercise test were conducted following McMannis(1986) method. RESULTS: The decrease rate in compound muscle action potential amplitudes was correlated with gender, and it was not influenced by age, height, weight, and exercise...
July 24, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28682826/misleading-eeg-lateralization-associated-with-midline-shift
#10
Gena R Ghearing, Sergiu Abramovici, Alexandra Popescu, Maria E Baldwin
Midline discharges, lateralized periodic discharges, and seizures have been described with ipsilateral lesions that result in midline shift (MLS). Periodic discharges and seizures arising contralateral to a known lesion have not previously been described as a sign of MLS. We present four patients with focal brain lesions, resulting in MLS and epileptiform discharges arising from the contralateral hemisphere. Patient 1 underwent a right anterior temporal lobectomy. On postoperative day 2, computed tomography demonstrated a right to left MLS of 12 mm, and EEG was remarkable for left temporal nonconvulsive status epilepticus...
July 4, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28665820/magnetoencephalographic-recordings-in-infants-using-a-standard-sized-array-technical-adequacy-and-diagnostic-yield
#11
Sumiya Shibata, John C Mosher, Prakash Kotagal, Ajay Gupta, Andreas V Alexopoulos, Richard C Burgess
PURPOSE: Although a few magnetoencephalography (MEG) systems have been built specifically for infants (<2 years), most children are routinely examined using MEG systems designed primarily to accommodate adult subjects. The practicality of the adult MEG device has not been systematically reviewed in infants with epilepsy. The aim of this study is to investigate whether infant epilepsy patients, whose heads are small relative to the sensor helmet, can have clinically successful MEG recordings using the conventional adult-size MEG device...
June 29, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28873073/eeg-characteristics-in-cooled-and-rewarmed-periods-in-post-cardiac-arrest-therapeutic-hypothermia-patients-erratum
#12
(no author information available yet)
No abstract text is available yet for this article.
September 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28873072/amplitude-integrated-eeg-and-brain-sparing-in-preterm-small-for-gestational-age-infants
#13
Isabel Benavente-Fernández, Simón P Lubián-López, Pamela Zafra-Rodríguez, Almudena Alonso-Ojembarrena, Antonio Segado-Arenas, Alfonso M Lechuga-Sancho
PURPOSE: Preterm small-for-gestational-age (SGA) infants are at risk for a high mortality rate and impaired cognitive development. Only a few studies have focused on amplitude-integrated EEG (aEEG) in preterm SGA infants. They have been shown to have a slower rate of brain maturation, but these findings have not consistently been related to neurodevelopmental outcomes. The aim of our study was to evaluate early aEEG monitoring in SGA compared with adequate-for-gestational-age preterms...
September 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28873071/guillain-barr%C3%A3-syndrome-and-swallowing-dysfunction
#14
Tuğçe Mengi, Yaprak Seçil, Tülay Kurt İncesu, Şehnaz Arici, Zehra Özde Akkiraz, Nevin Gürgör, Muhteşem Gedizlioğlu, Cumhur Ertekin
PURPOSE: Patients with Guillain-Barré syndrome (GBS), especially severe cases that require treatment in intensive care units, often experience swallowing difficulties. However, the oropharyngeal function of patients with GBS not treated in intensive care units is not typically evaluated using neurophysiological techniques. METHODS: Electrophysiological techniques were used to determine dysphagia limit and sequential water swallowing values in an electromyography laboratory...
September 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28872522/diagnostic-utility-of-repetitive-nerve-stimulation-in-a-large-cohort-of-patients-with-myasthenia-gravis
#15
Åsa Amandusson, Kristin Elf, Margareta E Grindlund, Anna R Punga
PURPOSE: Optimizing the diagnostic utility of repetitive nerve stimulation in myasthenia gravis (MG) may include tailoring the examination to clinical phenotype. Therefore, we analyzed all available repetitive nerve stimulation parameters in a large cohort of patients with confirmed MG diagnosis. METHODS: All repetitive nerve stimulation examinations at the Uppsala University Hospital rendering an MG diagnosis during 1996 to 2014 were analyzed. The deltoid, trapezius, anconeus, nasalis, abductor digiti quinti, and frontalis muscles were examined...
September 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28644823/eeg-characteristics-in-cooled-and-rewarmed-periods-in-post-cardiac-arrest-therapeutic-hypothermia-patients
#16
K Kim, Kimberly L Pargeon, Amy S Labar, Oren Friedman, Padmaja N Kandula, Douglas R Labar
PURPOSE: Continuous video EEG is a tool to assess brain function in injuries, including cardiac arrest (CA). In post-CA therapeutic hypothermia (TH) studies, some EEG features are linked to poor prognosis, but the evolvement of EEG characteristics during two temperature phases and its significance is unclear. We systematically analyzed EEG characteristics in cooled and rewarmed phases of post-CA therapeutic hypothermia patients and investigated their correlation to patient outcome. METHODS: This is a retrospective study of EEG analyses, from a single academic center, of 20 patients who underwent CA and therapeutic hypothermia...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28644204/hearing-safety-from-single-and-double-pulse-transcranial-magnetic-stimulation-in-children-and-young-adults
#17
Sahana N Kukke, Carmen C Brewer, Christopher Zalewski, Kelly A King, Diane Damiano, Katharine E Alter, Mark Hallett
PURPOSE: Concerns regarding hearing safety have limited the number of studies using transcranial magnetic stimulation (TMS) in children and young adults. The objective of this study was to examine the safety of TMS with regards to hearing in a group of 16 children and young adults (17.3 ± 4.9 years) with and without brain injury. METHODS: Pure-tone hearing thresholds and distortion-product otoacoustic emissions were measured before and after exposure to single- and paired-pulse TMS (1-2 sessions of 149-446 TMS pulses at a median of 49%-100% maximum stimulator output over a 2...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28644203/invasive-investigation-of-insular-cortex-epilepsy
#18
Philippe Ryvlin, Fabienne Picard
Invasive long-term EEG investigations of the insula have been performed since the mid-nineties in an expanding range of focal epilepsies suspected to involve the insular cortex. The various clinical forms of insular epilepsies were delineated during the last 2 decades, and include the following presentations: perisylvian epilepsy, temporal plus epilepsy, sleep hypermotor epilepsy, MRI-negative frontal and parietal lobe epilepsies, and insular lesions. In fact, a majority of complex stereoelectroencephalography procedures will include at least one electrode targeting the insula...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28644202/the-insula-in-temporal-plus-epilepsy
#19
Carmen Barba, Lorella Minotti, Anne-Sophie Job, Philippe Kahane
Temporal lobe epilepsy (TLE) surgery is the most common type of surgical treatment offered to patients with drug-resistant focal seizures. However, the proportion of patients experiencing long-term freedom from seizures after TLE surgery remains suboptimal. Temporal plus epilepsy, which is characterized by a primary temporal epileptogenic zone extending to neighboring regions, has been demonstrated to be a major predictor of TLE surgery failures. In the context of the temporoperisylvian epilepsies, i.e., the most common type of temporal plus epilepsy, a possible role of the insula has often been hypothesized...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28644201/insular-epilepsy-semiology-and-noninvasive-investigations
#20
Sami Obaid, Younes Zerouali, Dang Khoa Nguyen
In this review, authors discuss the semiology and noninvasive investigations of insular epilepsy, an underrecognized type of epilepsy, which may mimic other focal epilepsies. In line with the various functions of the insula and its widespread network of connections, insular epilepsy may feature a variety of early ictal manifestations from somatosensory, visceral, olfactory, gustatory, or vestibular manifestations. Depending on propagation pathways, insular seizures may also include altered consciousness, dystonic posturing, complex motor behaviors, and even autonomic features...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
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