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

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https://www.readbyqxmd.com/read/30219271/the-cerebellum-seems-not-a-little-brain-for-the-autonomic-nervous-system
#1
EDITORIAL
Ryuji Sakakibara
No abstract text is available yet for this article.
September 6, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30216910/nerve-ultrasound-findings-differentiate-charcot-marie-tooth-disease-cmt-1a-from-other-demyelinating-cmts
#2
Giampietro Zanette, Gian Maria Fabrizi, Federica Taioli, Matteo Francesco Lauriola, Andrea Badari, Moreno Ferrarini, Tiziana Cavallaro, Stefano Tamburin
OBJECTIVE: Ulnar/median motor nerve conduction velocity (MNCV) is ≤38 m/s in demyelinating Charcot-Marie-Tooth disease (CMT). Previous nerve high resolution ultrasound (HRUS) studies explored demyelinating CMT assuming it as a homogeneous genetic/pathological entity or focused on CMT1A. METHODS: To explore the spectrum of nerve HRUS findings in demyelinating CMTs, we recruited patients with CMT1A (N = 44), CMT1B (N = 9), CMTX (N = 8) and CMT4C (N = 4)...
September 1, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30216906/evidence-for-a-differential-visual-m300-brain-response-in-gamblers
#3
Noam Zilberman, Yair Dor Ziderman, Maor Zeev-Wolf, Abraham Goldstein, Gal Yadid, Yehuda Neumark, Yuri Rassovsky
OBJECTIVE: Gambling disorder is the first behavioral addiction recognized in the DSM-5. This marks the growing realization that both behavioral and substance-related addictions are manifestations of an 'addicted brain', displaying similar altered neurophysiological mechanisms. A decreased electrophysiological visual P300 is considered a hallmark effect of substance-related addictions, but has not yet been shown in behavioral addictions. METHODS: Magnetoencephalographic recordings of 15 gamblers and 17 controls were taken as they performed a cue-reactivity paradigm in which they passively viewed addiction- and non-addiction-related cues...
September 1, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30212805/effect-of-epileptiform-abnormality-burden-on-neurologic-outcome-and-antiepileptic-drug-management-after-subarachnoid-hemorrhage
#4
Sahar F Zafar, Eva N Postma, Siddharth Biswal, Emily J Boyle, Sophia Bechek, Kathryn O'Connor, Apeksha Shenoy, Jennifer Kim, Mouhsin S Shafi, Aman B Patel, Eric S Rosenthal, M Brandon Westover
OBJECTIVE: To quantify the burden of epileptiform abnormalities (EAs) including seizures, periodic and rhythmic activity, and sporadic discharges in patients with aneurysmal subarachnoid hemorrhage (aSAH), and assess the effect of EA burden and treatment on outcomes. METHODS: Retrospective analysis of 136 high-grade aSAH patients. EAs were defined using the American Clinical Neurophysiology Society nomenclature. Burden was defined as prevalence of <1%, 1-9%, 10-49%, 50-89%, and >90% for each 18-24 hour epoch...
September 1, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30209020/when-is-brainstem-death-brain-death-the-case-for-ancillary-testing-in-primary-infratentorial-brain-lesion
#5
REVIEW
Uwe Walter, José Luis Fernández-Torre, Timo Kirschstein, Steven Laureys
The widely accepted concept of brain death (BD) comprises the demonstration of irreversible coma in combination with the loss of brainstem reflexes and irreversible apnea. In some countries the combined clinical finding of coma, apnea, and loss of all tested brainstem reflexes ("brainstem death") is sufficient for diagnosing BD irrespective of the primary location of brain lesion. The present article aims to substantiate the need for ancillary testing in patients with primary infratentorial brain lesions...
September 1, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30216909/the-effects-of-aging-on-early-stages-of-the-auditory-deviance-detection-system
#6
Maryam Aghamolaei, Zahra Jafari, Sabine Grimm, Katarzyna Zarnowiec, Mojtaba Najafi-Koopaie, Carles Escera
OBJECTIVE: The aging effects on auditory change detection have been studied using the Mismatch Negativity (MMN) potential. However, recent studies have found earlier correlates of deviance detection at the level of the middle-latency response (MLR) and the effects of aging on this deviant-related response have not yet been clarified. The purpose of this study was to examine the effects of aging on both levels of the auditory deviance detection system. METHODS: MMN and MLR responses were recorded in 33 young and 29 older adults from 32 scalp electrodes during frequency oddball and swapped-oddball conditions...
August 31, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30216907/the-median-to-ulnar-cross-sectional-surface-area-ratio-in-carpal-tunnel-syndrome
#7
Nadim Jiwa, Alon Abraham, Vera Bril, Hans D Katzberg, Leif E Lovblom, Carolina Barnett, Ari Breiner
OBJECTIVE: To investigate the use of a sonographic median-to-ulnar cross-sectional area ratio (MUR) in diagnosis of carpal tunnel syndrome (CTS); and to compare the MUR with currently used sonographic parameters, and electrophysiology. METHODS: Subjects with CTS and healthy volunteers underwent ultrasound studies of the median and ulnar nerves in the wrist and forearm. Various sonographic parameters and ratios were calculated, and compared between CTS patients and controls...
August 31, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30195971/towards-closed-loop-deep-brain-stimulation-for-freezing-of-gait-in-parkinson-s-disease
#8
EDITORIAL
Moran Gilat
No abstract text is available yet for this article.
August 31, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30193768/electrodiagnosis-and-nerve-ultrasound-castor-and-pollux-in-the-management-of-neuropathies
#9
EDITORIAL
Luca Padua, Costanza Pazzaglia, Daniele Coraci
No abstract text is available yet for this article.
August 31, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30193767/harvesting-responses-to-single-pulse-electrical-stimulation-for-presurgical-evaluation-in-epilepsy
#10
EDITORIAL
Geertjan Huiskamp, Dorien van Blooijs, Michelle van der Stoel
No abstract text is available yet for this article.
August 31, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30216911/auditory-gamma-oscillations-predict-global-symptomatic-outcome-in-the-early-stages-of-psychosis-a-longitudinal-investigation
#11
Daisuke Koshiyama, Kenji Kirihara, Mariko Tada, Tatsuya Nagai, Mao Fujioka, Eriko Ichikawa, Kazusa Ohta, Motoko Tani, Maiko Tsuchiya, Akiko Kanehara, Kentaro Morita, Kingo Sawada, Jun Matsuoka, Yoshihiro Satomura, Shinsuke Koike, Motomu Suga, Tsuyoshi Araki, Kiyoto Kasai
OBJECTIVES: The gamma-band auditory steady-state response (ASSR) is thought to reflect the function of parvalbumin-positive γ-aminobutyric acid (GABA)-ergic interneurons and may be a candidate biomarker in early psychosis. Although previous cross-sectional studies have shown that gamma-band ASSR is reduced in early psychosis, whether reduced gamma-band ASSR could be a predictor of the long-term prognosis remains unknown. METHODS: In this longitudinal study, we investigated the association between gamma-band ASSR reduction and future global symptomatic or functional outcome in early psychosis...
August 30, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30216908/neurophysiological-monitoring-during-cervical-spine-surgeries-longitudinal-costs-and-outcomes
#12
John P Ney, Daniel P Kessler
OBJECTIVES: Well-designed longitudinal studies assessing effectiveness of intraoperative neurophysiologic monitoring (IONM) are lacking. We investigate IONM effects on cost and administrative markers for health outcomes in the year after cervical spine surgery. METHODS: We identified single-level cervical spine surgeries in commercial claims. We constructed linear regression models estimating the effect of IONM (controlling for patient demographics, pre-operative health, services during index admission) on total spending, neurological complications, readmissions, and outpatient opiate usage in the year following index surgery...
August 29, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30218942/failure-to-generate-baseline-muscle-motor-evoked-potentials-during-spine-surgery-risk-factors-and-association-with-the-postoperative-outcomes
#13
Jun-Soon Kim, Myoung-Jin Jang, Seung-Jae Hyun, Ki-Jeong Kim, Tae-Ahn Jahng, Hyun-Jib Kim, Sung-Min Kim, Kyung Seok Park
OBJECTIVE: To identify factors associated with the failure to generate baseline muscle motor evoked potentials (mMEPs) during spinal surgery, and to determine the association between baseline mMEP generation and postoperative outcomes. METHODS: A total of 345 patients who underwent spine surgery with intraoperative mMEP monitoring were included, and we retrospectively reviewed their demographic/clinical parameters, and mMEP recording results according to lesion locations...
August 22, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30131211/microlesion-effects-suboptimal-lead-placement-and-disease-progression-are-critical-determinants-for-dbs-tolerance-in-essential-tremor
#14
LETTER
Aparna Wagle Shukla, Michael S Okun
No abstract text is available yet for this article.
August 16, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30144660/removing-deep-brain-stimulation-artifacts-from-the-electroencephalogram-issues-recommendations-and-an-open-source-toolbox
#15
REVIEW
Guillaume Lio, Stéphane Thobois, Bénédicte Ballanger, Brian Lau, Philippe Boulinguez
A major question for deep brain stimulation (DBS) research is understanding how DBS of one target area modulates activity in different parts of the brain. EEG gives privileged access to brain dynamics, but its use with implanted patients is limited since DBS adds significant high-amplitude electrical artifacts that can completely obscure neural activity measured using EEG. Here, we systematically review and discuss the methods available for removing DBS artifacts. These include simple techniques such as oversampling, antialiasing analog filtering and digital low-pass filtering, which are necessary but typically not sufficient to fully remove DBS artifacts when each is used in isolation...
August 13, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30150028/intra-operative-cortical-motor-mapping-using-subdural-grid-electrodes-in-children-undergoing-epilepsy-surgery-evaluation-and-comparison-with-the-conventional-extra-operative-motor-mapping
#16
Puneet Jain, Robyn Whitney, Samuel Strantzas, Blathnaid McCoy, Ayako Ochi, Hiroshi Otsubo, O Carter Snead, Shelly Weiss, Elizabeth Donner, Elizabeth Pang, Rohit Sharma, Amrita Viljoen, Anne Keller, James M Drake, James T Rutka, Cristina Go
OBJECTIVES: The objective of this study was to review our experience with intra-operative "train of five" stimulation using subdural grid for motor mapping in children undergoing epilepsy surgery evaluation. METHODS: Twenty consecutive children below 18-years of age with drug-refractory epilepsy who underwent invasive-EEG monitoring using subdural-grid placement and intra-operative motor mapping using direct cortical stimulation by sub-dural grid electrodes (IODCS-SDG) at our institution between January-2016 and June-2017 were reviewed...
August 12, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30130723/ulnar-neuropathy-with-abnormal-non-localizing-electrophysiology-clinical-electrophysiological-and-ultrasound-findings
#17
Luciana Pelosi, Dominic Ming Yin Tse, Eoin Mulroy, Andrew M Chancellor, Michael R Boland
OBJECTIVE: To systematically study demographic, clinical, electrophysiological and nerve ultrasound characteristics of ulnar neuropathy with abnormal non-localizing electrophysiology (NL-UN) and further define the utility of ultrasound over and above the conventional electro-diagnostic approach. METHOD: NL-UNs were prospectively identified from 113 consecutive referrals with suspected ulnar neuropathy. All received electro-diagnostic tests and ulnar nerve ultrasound...
August 12, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30119920/multifactorial-etiology-for-tolerance-to-deep-brain-stimulation-for-essential-tremor-syndrome
#18
LETTER
Shabbir Hussain I Merchant
No abstract text is available yet for this article.
August 12, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30144659/anti-mag-neuropathy-role-of-igm-antibodies-the-paranodal-junction-and-juxtaparanodal-potassium-channels
#19
Nidhi Garg, Susanna B Park, James Howells, Yu-Ichi Noto, Steve Vucic, Con Yiannikas, Susan E Tomlinson, William Huynh, Neil G Simon, Emily K Mathey, Judith Spies, John D Pollard, Arun V Krishnan, Matthew C Kiernan
OBJECTIVE: To improve understanding of disease pathophysiology in anti-myelin-associated glycoprotein (anti-MAG) neuropathy to guide further treatment approaches. METHODS: Anti-MAG neuropathy patients underwent clinical assessments, nerve conduction and excitability studies, and ultrasound assessment. RESULTS: Patients demonstrated a distinctive axonal excitability profile characterised by a reduction in superexcitability [MAG: -14.2 ± 1...
August 10, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/30114662/strength-and-stability-of-eeg-functional-connectivity-predict-treatment-response-in-infants-with-epileptic-spasms
#20
Daniel W Shrey, Olivia Kim McManus, Rajsekar Rajaraman, Hernando Ombao, Shaun A Hussain, Beth A Lopour
OBJECTIVE: Epileptic spasms (ES) are associated with pathological neuronal networks, which may underlie characteristic EEG patterns such as hypsarrhythmia. Here we evaluate EEG functional connectivity as a quantitative marker of treatment response, in comparison to classic visual EEG features. METHODS: We retrospectively identified 21 ES patients and 21 healthy controls. EEG data recorded before treatment and after ≥10 days of treatment underwent blinded visual assessment, and functional connectivity was measured using cross-correlation techniques...
August 4, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
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