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

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https://www.readbyqxmd.com/read/27893495/integration-of-eeg-into-psychiatric-practice-a-step-toward-precision-medicine-for-autism-spectrum-disorder
#1
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 (IEDs) 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...
November 22, 2016: 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 diagnose for focal lesions of the median nerve were included in this study. Electrophysiological studies and MRI were conducted on 34 patients' hands. Patient 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)...
November 21, 2016: 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
#3
Elisabeth Chroni, Dimitra Veltsista, Chris Papapaulou, Eftychia Trachani
INTRODUCTION: 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...
November 17, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27870647/meg-may-reveal-hidden-population-of-spikes-in-epilepsy-with-porencephalic-cyst-encephalomalacia
#4
Yosuke Kakisaka, Zhong I Wang, Sumiya Shibata, Yoko Takahashi, John C Mosher, Andreas V Alexopoulos, Richard C Burgess
Porencephalic cyst/encephalomalacia (PC/E) is often associated with intractable epilepsy. A Limited number of studies reported Magnetoencephalography (MEG)'s potential to help construct treatment strategy for epilepsies associated with PC/E. We present here simultaneous EEG and MEG findings in three adult patients with pediatric-onset epilepsy due to PC/E. There were two types of spikes: one type was detected by MEG only (EEG-/MEG+), and the other detected by both EEG and MEG (EEG+/MEG+). Both types were seen in all three cases...
November 16, 2016: 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
#5
M E Evangelopoulos, S Humpert, K M Rösler
INTRODUCTION: Saphenous nerve conduction studies are difficult, since 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 2 groups. Group A consisted of 20 healthy subjects, while group B of 19 patients with polyneuropathies. Orthodromic conduction was measured by distal supramaximal nerve stimulation...
November 16, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27832046/periodic-discharges-insight-from-magnetoencephalography
#6
V Shvarts, G Zoltay, S M Bowyer, A Zillgitt, J E Moran, K Mason R, N Tepley, D Burdette
PURPOSE: This study utilized 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...
November 9, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27768616/author-s-response-to-texting-rhythm-with-temporal-predominance
#7
William O Tatum, Kirsten Yelvington, Ernst Rodin
No abstract text is available yet for this article.
October 20, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27763964/can-eeg-differentiate-among-syndromes-in-genetic-generalized-epilepsy
#8
Udaya Seneviratne, Graham Hepworth, Mark Cook, Wendyl D'Souza
PURPOSE: To evaluate electroencephalographic (EEG) differences among syndromes in genetic generalized epilepsy (GGE) based on quantified data. METHODS: 24-hour ambulatory EEGs were recorded in consecutive patients diagnosed with GGE. All epileptiform EEG abnormalities were quantified into density scores (total duration of epileptiform discharges per hour). We conducted one-way analysis of variance (ANOVA) to find out differences in EEG density scores among the syndromes...
October 19, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27763963/brief-potentially-ictal-rhythmic-discharges-b-i-rds-in-non-critically-ill-adults
#9
Ji Yeoun Yoo, Lara V Marcuse, Madeline C Fields, Jillian 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 non-critically 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...
October 19, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27763968/effects-of-marijuana-on-ictal-and-interictal-eeg-activity-in-idiopathic-generalized-epilepsy
#10
Sanjeev Sivakumar, Deepti Zutshi, Navid Seraji-Bozorgzad, Aashit Shah
Marijuana-based treatment for refractory epilepsy shows promise in surveys, case series and clinical trials. However, literature on their electroencephalography (EEG) effects is sparse. Our objective is to analyze the effect of marijuana on EEG in a 24-year-old patient with idiopathic generalized epilepsy (IGE) treated with cannabis. We blindly reviewed three long-term EEGs-a 24-hour study while only on antiepileptic drugs (AEDs), a 72-hour EEG with Cannabis indica smoked on days one and three in addition to AEDs and a 48-hour EEG with combination C...
October 18, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27763967/functional-mri-correlates-of-resting-state-temporal-theta-and-delta-eeg-rhythms
#11
Rohit Marawar, Hsiang J Yeh, Chris Carnabatu, John M Stern
INTRODUCTION: The EEG rhythms demonstrate changes in frequency and power with spontaneous changes in behavioral state that do not have well understood metabolic correlates within the brain. To investigate this question and compare the temporal lobe theta and delta rhythms, resting-state functional MRI (fMRI) was obtained with simultaneous EEG. METHODS: Simultaneous EEG-fMRI was recorded from 14 healthy, sleep-deprived subjects in awake and drowsy states. Scalp electrodes corresponding to bilateral temporal lobes were used to calculate delta and theta band power...
October 18, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27763966/impaired-function-of-c-nociceptors-in-chronic-inflammatory-demyelinating-polyradiculopathy-indicated-by-electrically-induced-axon-flare-reflex
#12
Panagiotis Kokotis, Martin Schmelz, Aikaterini E Papagianni, Thomas Zambelis, Nikos Karandreas
INTRODUCTION: 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 chronic inflammatory demyelinating polyradiculopathy with healthy subjects. MATERIALS AND METHODS: We examined 18 patients fulfilling the criteria for CIDP (11 male, mean age 51...
October 18, 2016: 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
#13
Kaori Tamura, Takaaki Mizuba, Tsuyoshi Okamoto, Mayumi Matsufuji, Sachio Takashima, Keiji Iramina
INTRODUCTION: 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. The present study evaluated cognitive function in patients with severe motor and intellectual disabilities after early brain injuries due to cerebral hemorrhage (CH) or periventricular leukomalacia (PVL)...
October 18, 2016: 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
#14
Volkan Solmaz, Selçuk Yavuz, Ahmet İnanr, Dürdane Aksoy, Elmas Pektaş, Aslan Tekataş, Semiha Gulsum Kurt
INTRODUCTION: our aim was to determine if there are electro diagnostic (EDX) differences between carpal tunnel syndrome (CTS) patients with diabetes mellitus (DM), CTS+hypothyroidism (HT), CTS+fibromyalgia (FMS), CTS+rheumatoid arthritis (RA), and idiopathic CTS cases by comparing nerve conduction studies (NCS). METHOD: This research examined electrophysiological studies of untreated 47 HT+CTS, 47 DM+CTS, 49 RA+CTS, 52 FMS+CTS, 50 idiopathic CTS cases, and a healthy control group of 50 individuals (total of 293 patients and 433 hands with CTS)...
October 6, 2016: 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
#15
Yasuaki Imajo, Tsukasa Kanchiku, Hidenori Suzuki, Masahiro Funaba, Norihiro Nishida, Kazuhiro Fujimoto, Toshihiko Taguchi
INTRODUCTION: Lumbar spinal stenosis (LSS) typically presents with neurogenic intermittent claudication (NIC). The aim is to investigate cauda equina conduction time (CECT) in patients with NIC caused by LSS and its relationship with age and body height in normal subjects. METHODS: The study included 172 normal subjects (mean age 44.1 ± 16.6 years; mean height 163.7 ± 8.9 cm). (Group C) 47 patients (mean age 71.3 ± 8.7 years; mean height 158.8 ± 11.2 cm) underwent surgery due to NIC in cauda equina type for LSS...
October 5, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27749506/texting-rhythm-with-temporal-predominance
#16
Stuart Tomko, Tobias Loddenkemper, Phillip L Pearl
No abstract text is available yet for this article.
October 5, 2016: 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
#17
Zulfi Haneef, Sharon Chiang, Holly Rutherford, Arun Antony
INTRODUCTION: 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...
October 5, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27749504/perfusion-mri-can-impact-treatment-decision-in-ictal-interictal-continuum
#18
A Venkatraman, A Khawaja, A K Bag, M Mirza, J P Szaflarski, S Pati
Lateralized Periodic Discharges (LPDs) are commonly seen on EEG in critically-ill patients. They are often associated with seizures, but some patients may have them without seizures. Therefore, they are considered to lie in the ictal-interictal continuum. When ictal, they require multiple antiepileptic drugs to treat effectively, which can expose the patient to iatrogenic complications. Therefore, optimal management is controversial. We present here two cases where perfusion-weighted Magnetic Resonance Imaging (pMRI) was useful in distinguishing ictal from interictal LPDs...
October 5, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27749503/aliasing-of-60-hz-artifact-due-to-compressed-timebase
#19
Robert D Bolen, Jonathan J Halford, Jonathan C Edwards
INTRODUCTION: Digital EEG has brought about greater flexibility in data interpretation but has also resulted in new and unique artifacts. As digital EEG has evolved, an increase in ICU monitoring has occurred, bringing more sources of artifact to light. Aliasing due to a combination of compressed timebase and display monitor resolution can result in appearance of spurious waveforms that can potentially skew interpretation. METHODS: A portion of a digital EEG from an ICU patient acquired at a sample rate of 1024 Hz was reviewed at a timebase of 15 mm/sec on a monitor with a resolution of 1920x1080...
October 5, 2016: 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
#20
Barrett Cromeens, Jennifer L McKinney, Jeffrey Leonard, Lance Governale, Judy Brown, Christina Henry, Marc Levitt, Richard Wood, Gail 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 (NIOM) for these cases has been discussed in the literature with variable utility. We present a case of pygopagus twins with fused spinal cords and imperforate anus where the use of NIOM significantly impacted surgical decision making in division of these critical structures...
October 1, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
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