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

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https://www.readbyqxmd.com/read/30005220/enhancement-and-bilateral-synchronization-of-ripples-in-atypical-benign-epilepsy-of-childhood-with-centrotemporal-spikes
#1
Satoru Ikemoto, Shin-Ichiro Hamano, Susumu Yokota, Reiko Koichihara, Yuko Hirata, Ryuki Matsuura
OBJECTIVE: To determine whether the characteristics of scalp-recorded high frequency oscillations, especially ripples, can predict the "atypical forms" of benign epilepsy of childhood with centrotemporal spikes (ABECTS), in BECTS. METHODS: Seven patients with ABECTS and eighteen patients with BECTS underwent electroencephalography (EEG) in the secondary bilateral synchrony (SBS) and non-SBS periods for ABECTS patients. SBS period is that when more than 50% of the interictal epileptiform discharges (IEDs) are bilaterally synchronized...
July 6, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30005214/impact-of-non-brain-anatomy-and-coil-orientation-on-inter-and-intra-subject-variability-in-tms-at-midline
#2
Erik G Lee, Priyam Rastogi, Ravi L Hadimani, David C Jiles, Joan A Camprodon
OBJECTIVE: To investigate inter-subject variability with respect to cerebrospinal fluid thickness and brain-scalp distance, and to investigate intra-subject variability with different coil orientations. METHODS: Simulations of the induced electric field (E-Field) using a figure-8 coil over the vertex were conducted on 50 unique head models and varying orientations on 25 models. Metrics exploring stimulation intensity, spread, and localization were used to describe inter-subject variability and effects of non-brain anatomy...
July 6, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30001935/doing-it-the-other-way-round-mapping-motor-function-by-intrinsic-activity
#3
EDITORIAL
Johannes Sarnthein, Richard Wennberg
No abstract text is available yet for this article.
July 5, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30005217/association-between-mismatch-negativity-and-voxel-based-brain-volume-in-schizophrenia
#4
Wei-Lieh Huang, Chao-Yu Liu, Chih-Min Liu, Hon-Man Liu, Chung-Yi Yang, Tzung-Jeng Hwang, Ming H Hsieh, Hai-Gwo Hwu
OBJECTIVE: This study aimed to investigate the association between mismatch negativity (MMN) and volumes of several brain regions measured using a semi-automated method in patients with schizophrenia and healthy controls. METHODS: MMN in response to duration deviants and magnetic resonance imaging were acquired from 36 schizophrenia patients and 14 healthy controls. FreeSurfer was used for volumetric analysis. MMN amplitudes, brain volumes and their association were compared between schizophrenia and controls...
July 3, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30005219/resting-cranial-and-upper-cervical-muscle-activity-is-increased-in-patients-with-migraine
#5
Azin S Janani, Kenneth J Pope, Nicole Fenton, Tyler S Grummett, Hanieh Bakhshayesh, Trent W Lewis, Dean H Watson, Emma M Whitham, John O Willoughby
OBJECTIVE: To compare comprehensive measures of scalp-recorded muscle activity in migraineurs and controls. METHOD: We used whole-of-head high-density scalp electrical recordings, independent component analysis (ICA) and spectral slope of the derived components, to define muscle (electromyogram-containing) components. After projecting muscle components back to scalp, we quantified scalp spectral power in the frequency range, 52-98 Hz, reflecting muscle activation...
June 30, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30005218/optimal-timing-and-differential-significance-of-postoperative-awake-and-sleep-eeg-to-predict-seizure-outcome-after-temporal-lobectomy
#6
Chaturbhuj Rathore, Pandurang R Wattamwar, Neeraj Baheti, Malcolm Jeyaraj, Gopal K Dash, Sankara P Sarma, Kurupath Radhakrishnan
OBJECTIVE: To evaluate the prognostic value of postoperative EEGs to estimate post anterior temporal lobectomy (ATL) seizure outcome. METHODS: We studied postoperative EEGs in 325 consecutive patients who had minimum five years of post-ATL followup. Interictal epileptiform discharges (IEDs) present only during sleep were classified as sleep IEDs. We defined favorable final-year outcome as no seizures during the final one year and favorable absolute-postoperative outcome as no seizures during the entire postoperative period...
June 30, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29981958/visual-rehabilitation-training-alters-attentional-networks-in-hemianopia-an-fmri-study
#7
Qilin Lu, Xiaoxiao Wang, Lin Li, Bensheng Qiu, Shihui Wei, Bernhard A Sabel, Yifeng Zhou
OBJECTIVE: Hemianopia is a visual field defect following post-chiasmatic damage. We now applied functional magnetic resonance imaging (fMRI) in hemianopic patients before and after visual rehabilitation training (VRT) to examine the impact of VRT on attentional function networks. METHODS: Seven chronic hemianopic patients with post- chiasmatic lesions carried out a VRT for five weeks under fixation control. Before vs. after intervention, we assessed the area of residual vision (ARV), contrast sensitivity function (CSF) and functional MRI data and correlated them with each other...
June 30, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29981956/retinal-ganglion-cell-function-in-recovered-optic-neuritis-faster-is-not-better
#8
Pedro Monsalve, Sandy Ren, Hong Jiang, Jianhua Wang, Maja Kostic, Philip Gordon, Vittorio Porciatti
OBJECTIVE: To assess residual retinal ganglion cell (RGC) function in patients with recovered optic neuritis (ON) and multiple sclerosis (MS). METHODS: Age-matched controls (C, n = 32) and MS patients (n = 17) with history of ON in one eye but normal visual acuity and color vision were tested with steady-state Pattern Electroretinogram (PERG). Light Emitting Diodes (LED)-generated bar gratings, robust signal averaging and Fourier analysis were used to assess response amplitude and latency...
June 30, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30005212/small-sharp-spikes-as-eeg-markers-of-mesiotemporal-lobe-epilepsy
#9
Naoum P Issa, Shasha Wu, Sandra Rose, Vernon L Towle, Peter C Warnke, James X Tao
OBJECTIVE: Mesial temporal lobe epilepsy (mTLE) is the most common type of focal epilepsy, but often lacks scalp EEG correlates. We ask if hippocampal epileptiform discharges that are characteristic of mTLE are associated with small sharp spikes (SSS) recorded on scalp EEG. SSS are considered benign waveforms, so are not currently used as markers of epilepsy. METHODS: To determine if there is a relationship between SSS and hippocampal discharges, simultaneous scalp and hippocampal depth electrode EEGs were recorded from 27 patients being evaluated for possible mTLE...
June 28, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29981961/systematic-review-of-cognitive-event-related-potentials-in-euthymic-bipolar-disorder
#10
REVIEW
Anne M Morsel, Manuel Morrens, Monica Dhar, Bernard Sabbe
Cognitive deficits are critical features of bipolar disorder (BD), greatly impacting quality of life. The aim is to systematically review and critically evaluate underlying event related potential (ERP) features in euthymic BD relating to differences in sensory processes, attention, inhibition and conflict monitoring compared with healthy controls. 911 unique articles were identified using the PubMed database and 14 studies met the inclusion criteria. Individuals with BD in a euthymic state have reduced P50 sensory gating and reduced P100 amplitudes compared with healthy controls...
June 27, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29981960/somatosensory-temporal-discrimination-in-parkinson-s-disease-dystonia-and-essential-tremor-pathophysiological-and-clinical-implications
#11
Antonella Conte, Gina Ferrazzano, Daniele Belvisi, Nicoletta Manzo, Emanuele Battista, Pietro Li Voti, Andrea Nardella, Giovanni Fabbrini, Alfredo Berardelli
OBJECTIVE: To investigate whether changes in the somatosensory temporal discrimination threshold (STDT) in Parkinson's disease (PD) and dystonia reflect the involvement of specific neural structures or mechanisms related to tremor, and whether the STDT can discriminate patients with PD, dystonia or essential tremor (ET). METHODS: We tested STDT in 223 patients with PD, dystonia and ET and compared STDT values in patients with PD and dystonia with tremor with those of PD and CD without tremor...
June 27, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29981954/behavioral-and-electrophysiological-evidence-for-gabaergic-modulation-through-transcutaneous-vagus-nerve-stimulation
#12
Marius Keute, Philipp Ruhnau, Hans-Jochen Heinze, Tino Zaehle
OBJECTIVE: Transcutaneous vagus nerve stimulation (tVNS) has been hypothesized to modulate γ-aminobutyric (GABA) transmission in the human brain. GABA in the motor cortex is highly correlated to measures of automatic motor inhibition that can be obtained in simple response priming paradigms. To test the effects of tVNS on GABA transmission, we measured tVNS-induced alterations in behavioral and electrophysiology during automatic motor inhibition. METHODS: Participants were 16 young, healthy adults (8 female)...
June 27, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29958767/meg-revealed-new-functional-hub-of-atypical-brain-network-in-autism-spectrum-disorders
#13
EDITORIAL
Ryouhei Ishii, Leonides Canuet
No abstract text is available yet for this article.
June 26, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29981959/impact-of-radiotracer-injection-latency-and-seizure-duration-on-subtraction-ictal-spect-co-registered-to-mri-siscom-performance-in-children
#14
Gewalin Aungaroon, Andrew Trout, Rupa Radhakrishnan, Paul S Horn, Ravindra Arya, Jeffrey R Tenney, Todd M Arthur, Katherine D Holland, Francesco T Mangano, James L Leach, Leonid Rozhkov, Hansel M Greiner
OBJECTIVE: We evaluated the impact of radiotracer injection latency and post-injection seizure duration on subtraction ictal SPECT co-registered to MRI (SISCOM) test performance in identifying the epileptogenic zone (EZ) in children with drug-resistant epilepsy who had undergone a resective epilepsy surgery. METHODS: SISCOM concordance with the EZ was retrospectively reviewed to evaluate its performance in 113 children. The impact of radiotracer injection latency and post-injection seizure duration was evaluated for their predictive value of SISCOM localization accuracy...
June 23, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30005216/frontal-eeg-asymmetry-in-extremely-low-birth-weight-adult-survivors-links-to-antenatal-corticosteroid-exposure-and-psychopathology
#15
John E Krzeczkowski, Louis A Schmidt, Calan Savoy, Saroj Saigal, Ryan J Van Lieshout
OBJECTIVE: Extremely low birth weight (ELBW; <1000 g) survivors are exposed to significant perinatal adversity. In many cases, mothers of these infants receive antenatal corticosteroids (ACS), which reduce offspring neonatal mortality but may have lasting neuropsychiatric effects. However, the long-term neurophysiological effects of being born at ELBW and exposed to ACS are unknown. METHODS: We compared resting frontal electroencephalogram (EEG) alpha asymmetry in ELBW survivors (n = 51), some of whom were exposed to antenatal corticosteroids (ELBW-S; n = 23) versus non-exposed (ELBW-NS; n = 28), and normal birth weight controls (NBW; n = 66) in adulthood (mage  = 32...
June 22, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29935961/multi-component-intrinsic-brain-activities-as-a-safe-alternative-to-cortical-stimulation-for-sensori-motor-mapping-in-neurosurgery
#16
Shuichiro Neshige, Masao Matsuhashi, Katsuya Kobayashi, Takeyo Sakurai, Akihiro Shimotake, Takefumi Hitomi, Takayuki Kikuchi, Kazumichi Yoshida, Takeharu Kunieda, Riki Matsumoto, Ryosuke Takahashi, Susumu Miyamoto, Hirofumi Maruyama, Masayasu Matsumoto, Akio Ikeda
OBJECTIVE: To assess the feasibility of multi-component electrocorticography (ECoG)-based mapping using "wide-spectrum, intrinsic-brain activities" for identifying the primary sensori-motor area (S1-M1) by comparing that using electrical cortical stimulation (ECS). METHODS: We evaluated 14 epilepsy patients with 1514 subdural electrodes implantation covering the perirolandic cortices at Kyoto University Hospital between 2011 and 2016. We performed multi-component, ECoG-based mapping (band-pass filter, 0...
June 18, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29935475/quantitative-eeg-and-functional-outcome-following-acute-ischemic-stroke
#17
Carla Bentes, Ana Rita Peralta, Pedro Viana, Hugo Martins, Carlos Morgado, Carlos Casimiro, Ana Catarina Franco, Ana Catarina Fonseca, Ruth Geraldes, Patrícia Canhão, Teresa Pinho E Melo, Teresa Paiva, José M Ferro
OBJECTIVE: To identify the most accurate quantitative electroencephalographic (qEEG) predictor(s) of unfavorable post-ischemic stroke outcome, and its discriminative capacity compared to already known demographic, clinical and imaging prognostic markers. METHODS: Prospective cohort of 151 consecutive anterior circulation ischemic stroke patients followed for 12 months. EEG was recorded within 72 h and at discharge or 7 days post-stroke. QEEG (global band power, symmetry, affected/unaffected hemisphere and time changes) indices were calculated from mean Fast Fourier Transform and analyzed as predictors of unfavorable outcome (mRS ≥ 3), at discharge and 12 months poststroke, before and after adjustment for age, admission NIHSS and ASPECTS...
June 18, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29934265/treatment-of-ulnar-neuropathy-at-the-elbow-an-ongoing-conundrum
#18
EDITORIAL
Neil G Simon
No abstract text is available yet for this article.
June 18, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29934263/decreased-alpha2-connectivity-in-eeg-is-correlated-with-the-cognitive-and-psychiatric-manifestations-of-parkinson-s-disease
#19
EDITORIAL
Peter Fuhr, Ute Gschwandtner
No abstract text is available yet for this article.
June 18, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29929168/impaired-consciousness-through-a-focal-lesion-under-the-left-posteromedial-cortex
#20
LETTER
Hiroshi Fujioka, Eiichirou Urasaki, Katsuhiro Yamashita
No abstract text is available yet for this article.
June 18, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
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