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Neurophysiological monitoring

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https://www.readbyqxmd.com/read/28815192/epileptic-negative-myoclonus-as-the-first-and-only-symptom-in-a-challenging-diagnosis-of-benign-epilepsy-with-centrotemporal-spikes
#1
Jing Chen, Guo Zheng, Hu Guo, Xiaopeng Lu, Chunfeng Wu, Xiaoyu Wang, Wei Tao
OBJECTIVE: To investigate the clinical and neurophysiological characteristics of epileptic negative myoclonus as the first and only ictal symptom of benign epilepsy with centrotemporal spikes. METHODS: Electrophysiological evaluations included polygraphic recordings with simultaneous video electroencephalogram monitoring and tests performed with patient's upper limb outstretched in standing posture. Epileptic negative myoclonus manifestations, electrophysiological features, and responses to antiepileptic drugs were analyzed...
January 2017: Child neurology open
https://www.readbyqxmd.com/read/28805756/-an-experience-of-neurophysiological-monitoring-in-neurosurgery
#2
A G Vasyatkina, E A Levin, K Yu Orlov, V V Kobozev
AIM: To evaluate the efficacy of neuromonitoring methods in prevention of postoperative neurological complications and estimation of predictive power of intraoperative changes in monitored characteristics. MATERIAL AND METHODS: Retrospective study examined 240 patients, operated in the years 2014-2015 using intraoperative neurophysiological monitoring. One hundred and seventy-three patients suffered from hemispheric lesions and 67 had lesions located in or near the brainstem...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28796106/surgical-treatment-of-hemifacial-spasm-caused-by-the-compression-of-internal-auditory-canal-of-facial-nerve
#3
Jin Zhu, Xin Zhang, Hua Zhao, Yin-Da Tang, Ting-Ting Ying, Shi-Ting Li
OBJECTIVE: To make out the way to distinguish the offending vessels compressed the internal auditory canal part of the facial nerve. METHODS: The hemifacial spasm patients were treated of microvascular decompression surgery with neurophysiologic monitoring. The patients were found that the internal auditory canal of the facial nerves was fully compressed, and the records of surgery monitoring were analyzed. RESULTS: All the patients were recorded the delay incubation period in electromyography monitoring, and all patients were hemifacial spasm free finally...
August 8, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28772244/exploring-resting-state-eeg-brain-oscillatory-activity-in-relation-to-cognitive-functioning-in-multiple-sclerosis
#4
Philipp M Keune, Sascha Hansen, Emily Weber, Franziska Zapf, Juliane Habich, Jana Muenssinger, Sebastian Wolf, Michael Schönenberg, Patrick Oschmann
OBJECTIVE: Neurophysiologic monitoring parameters related to cognition in Multiple Sclerosis (MS) are sparse. Previous work reported an association between magnetoencephalographic (MEG) alpha-1 activity and information processing speed. While this remains to be replicated by more available electroencephalographic (EEG) methods, also other established EEG markers, e.g. the slow-wave/fast-wave ratio (theta/beta ratio), remain to be explored in this context. METHODS: Performance on standard tests addressing information processing speed and attention (Symbol-Digit Modalities Test, SDMT; Test of Attention Performance, TAP) was examined in relation to resting-state EEG alpha-1 and alpha-2 activity and the theta/beta ratio in 25MS patients...
September 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28766024/usefulness-of-intraoperative-electromyographic-monitoring-of-oculomotor-and-abducens-nerves-during-skull-base-surgery
#5
Zi-Yi Li, Ming-Chu Li, Jian-Tao Liang, Yu-Hai Bao, Ge Chen, Hong-Chuan Guo, Feng Ling
BACKGROUND: Intraoperative neurophysiologic monitoring of the extraocular cranial nerve (EOCN) is not commonly performed because of technical difficulty and risk, reliability of the result and predictability of the postoperative function of the EOCN. METHODS: We performed oculomotor nerve (CN III) and abducens nerve (CN VI) intraoperative monitoring in patients with skull base surgery by recording the spontaneous muscle activity (SMA) and compound muscle action potential (CMAP)...
August 2, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28761524/selective-dorsal-rhizotomy-a-multidisciplinary-approach-to-treating-spastic-diplegia
#6
Hussam Abou Al-Shaar, Muhammad Tariq Imtiaz, Hazem Alhalabi, Shara M Alsubaie, Abdulrahman J Sabbagh
BACKGROUND: Spasticity is a motor disorder that interferes with mobility and affects the quality of life. Different approaches have been utilized to address patients with spastic diplegia, among which is selective dorsal rhizotomy (SDR). Although SDR has been shown to be efficacious in treating spastic patients, many neurologists and neurosurgeons are not well aware of the procedure, its indications, and expected outcomes due to the limited number of centers performing this procedure...
July 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28758184/motor-evoked-potentials-and-bis-guided-anaesthesia-in-image-guided-mini-invasive-neurosurgery-of-supratentorial-tumors-nearby-the-cortico-spinal-tract
#7
Roberto Cordella, Eleonora Orena, Francesco Acerbi, Elena Beretta, Dario Caldiroli, Francesco Dimeco, Carla Carozzi
AIM: to describe and evaluate the anaesthesiological regimen used in neurophysiologically monitored image-guided mini-invasive neurosurgery. MATERIAL AND METHODS: 24 patients underwent elective surgery under general anaesthesia that was administered through Target Controlled Infusion (TCI) for effect-site concentration (Ce) of Propofol and Remifentanil, targeting Bispectral Index (BIS) in the 40-60 intervals. Stimulating intensity of transcranial motor evoked potentials (tMEP), BIS index, Propofol and Remifentanil Ce were collected at MEPs threshold (T) definition (respectively BIS@T, CeProp@T and CeRemi@T)...
June 14, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28744209/performance-monitoring-applied-to-system-supervision
#8
REVIEW
Bertille Somon, Aurélie Campagne, Arnaud Delorme, Bruno Berberian
Nowadays, automation is present in every aspect of our daily life and has some benefits. Nonetheless, empirical data suggest that traditional automation has many negative performance and safety consequences as it changed task performers into task supervisors. In this context, we propose to use recent insights into the anatomical and neurophysiological substrates of action monitoring in humans, to help further characterize performance monitoring during system supervision. Error monitoring is critical for humans to learn from the consequences of their actions...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28719456/warning-criteria-for-intraoperative-neurophysiologic-monitoring
#9
Quanmeng Liu, Qinzhou Wang, Hongen Liu, William K K Wu, Matthew T V Chan
PURPOSE OF REVIEW: Intraoperative changes in somatosensory (SEP) and motor evoked potentials (MEPs) may indicate potential injury to the spinal cord and will require timely intervention to prevent permanent damage. This review focuses on the validity of currently recommended warning criteria for intraoperative evoked potential monitoring. RECENT FINDINGS: Current guideline recommends a decrease in SEP amplitude by 50% and MEP amplitude by 50-100% as warning signals for injury to the ascending sensory and descending motor pathway, respectively...
July 15, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28713053/perils-of-intraoperative-neurophysiological-monitoring-analysis-of-false-negative-results-in-spine-surgeries
#10
Arvydas A Tamkus, Kent S Rice, Michael T McCaffrey
BACKGROUND CONTEXT: Although some authors have published case reports describing false negatives in intraoperative neurophysiological monitoring (IONM), a systematic review of causes of false-negative IONM results is lacking. PURPOSE: The objective of this study was to analyze false-negative IONM findings in spine surgery. STUDY DESIGN: This is a retrospective cohort analysis. PATIENT SAMPLE: A cohort of 109 patients with new postoperative neurologic deficits was analyzed for possible false-negative IONM reporting...
July 13, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28701934/neuronal-intra-individual-variability-masks-response-selection-differences-between-adhd-subtypes-a-need-to-change-perspectives
#11
Annet Bluschke, Witold X Chmielewski, Moritz Mückschel, Veit Roessner, Christian Beste
Due to the high intra-individual variability in attention deficit/hyperactivity disorder (ADHD), there may be considerable bias in knowledge about altered neurophysiological processes underlying executive dysfunctions in patients with different ADHD subtypes. When aiming to establish dimensional cognitive-neurophysiological constructs representing symptoms of ADHD as suggested by the initiative for Research Domain Criteria, it is crucial to consider such processes independent of variability. We examined patients with the predominantly inattentive subtype (attention deficit disorder, ADD) and the combined subtype of ADHD (ADHD-C) in a flanker task measuring conflict control...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28700611/in-vivo-calcium-imaging-from-dentate-granule-cells-with-wide-field-fluorescence-microscopy
#12
Yuichiro Hayashi, Satoshi Yawata, Kazuo Funabiki, Takatoshi Hikida
A combination of genetically-encoded calcium indicators and micro-optics has enabled monitoring of large-scale dynamics of neuronal activity from behaving animals. In these studies, wide-field microscopy is often used to visualize neural activity. However, this method lacks optical sectioning capability, and therefore its axial resolution is generally poor. At present, it is unclear whether wide-field microscopy can visualize activity of densely packed small neurons at cellular resolution. To examine the applicability of wide-field microscopy for small-sized neurons, we recorded calcium activity of dentate granule cells having a small soma diameter of approximately 10 micrometers...
2017: PloS One
https://www.readbyqxmd.com/read/28689398/an-electrode-configuration-for-recording-muscle-motor-evoked-potentials-in-the-upper-extremities-during-intraoperative-neurophysiological-monitoring
#13
Young-Doo Choi, Seung-Hyun Jin, Chi-Heon Kim, Gil Ho Kwak, Bo Eun Kim, Chun Kee Chung
OBJECTIVE: The main aim of the present study is to examine the electrode configurations used to record the muscle motor evoked potential (mMEP) in the upper extremities during surgery with the goal of producing a high and stable mMEP signal, in particular among the abductor pollicis brevis (APB), abductor digiti minimi (ADM), and across the APB-ADM muscles, which have been widely used for the mMEP in the upper extremities. METHODS: Thirty right-handed patients were recruited in this prospective study...
July 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28676974/long-term-evaluation-of-intraoperative-neurophysiological-monitoring-assisted-tethered-cord-surgery
#14
S E Dulfer, G Drost, F Lange, H L Journee, F H Wapstra, E W Hoving
PURPOSE: Patients with tethered spinal cord have been investigated for short-term effects after tethered spinal cord surgery in the past. However, little is known about the long-term effects in this patient group. In this retrospective, longitudinal, observational study, a patient sample of a previous report of 65 patients was reassessed to observe the long-term effects of intraoperative neurophysiological monitoring-assisted tethered cord surgery. METHODS: With the use of patient charts and a survey, patients were scored on four domains: (1) neurological deficits, (2) urological deficits, (3) pain symptoms, and (4) orthopedic deficits...
July 4, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28669422/slower-resting-alpha-frequency-is-associated-with-superior-localisation-of-moving-targets
#15
Christina J Howard, Craig P A Arnold, Matthew K Belmonte
We examined the neurophysiological underpinnings of individual differences in the ability to maintain up-to-date representations of the positions of moving objects. In two experiments similar to the multiple object tracking (MOT) task, we asked observers to monitor continuously one or several targets as they moved unpredictably for a semi-random period. After all objects disappeared, observers were immediately prompted to report the perceived final position of one queried target. Precision of these position reports declined with attentional load, and reports tended to best resemble positions occupied by the queried target between 0 and 30ms in the past...
October 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28664035/neurophysiological-mechanisms-of-circadian-cognitive-control-in-rls-patients-an-eeg-source-localization-study
#16
Rui Zhang, Moritz D Brandt, Wiebke Schrempf, Christian Beste, Ann-Kathrin Stock
The circadian variation of sensory and motor symptoms with increasing severity in the evening and at night is a key diagnostic feature/symptom of the restless legs syndrome (RLS). Even though many neurological diseases have shown a strong nexus between motor and cognitive symptoms, it has remained unclear whether cognitive performance of RLS patients declines in the evening and which neurophysiological mechanisms are affected by the circadian variation. In the current study, we examined daytime effects (morning vs...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28660303/the-role-of-eeg-recordings-in-children-undergoing-cardiac-surgery-for-congenital-heart-disease
#17
Sascha Meyer, Martin Poryo, Mohammed Shatat, Ludwig Gortner, Hashim Abdul-Khaliq
BACKGROUND: Neurological dysfunction may occur after corrective cardiac surgery using cardio-pulmonary bypass (CPB) with or without circulatory arrest. Different neurophysiological monitoring systems have been employed to detect neurological complications and possible brain injury in infants and children during and after cardiac surgery. The value of Elecetroencephalogram (EEG) in infants and children at risk for neurological sequelae has not been systematically studied. METHODS: Sequential performance of two EEGs before and after cardiac surgery at a tertiary University Hospital to screen for possible brain injury after cardiac surgery in neonates and children undergoing CPB surgery...
June 28, 2017: Wiener Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28660107/optimal-timing-of-surgery-for-intramedullary-cavernous-hemangioma-of-the-spinal-cord-in-relation-to-preoperative-motor-paresis-disease-duration-and-tumor-volume-and-location
#18
Shiro Imagama, Zenya Ito, Kei Ando, Kazuyoshi Kobayashi, Tetsuro Hida, Kenyu Ito, Mikito Tsushima, Yoshimoto Ishikawa, Akiyuki Matsumoto, Masayoshi Morozumi, Satoshi Tanaka, Masaaki Machino, Kyotaro Ota, Hiroaki Nakashima, Norimitsu Wakao, Yoshihito Sakai, Yukihiro Matsuyama, Naoki Ishiguro
STUDY DESIGN: Prospective study. OBJECTIVE: Investigate factors associated with preoperative motor paresis, recovery, ambulatory status, and intraoperative neurophysiological monitoring (IONM) among patients with no preoperative paresis (N group), complete preoperative motor recovery (CR group), and no complete recovery (NCR group) in patients with intramedullary spinal cavernous hemangioma to determine the optimal timing of surgery. METHODS: The study evaluated 41 surgical cases in our institute...
May 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28650882/diagnostic-utility-of-intraoperative-neurophysiological-monitoring-for-intramedullary-spinal-cord-tumors-systematic-review-and-meta-analysis
#19
Tej D Azad, Arjun V Pendharkar, Viet Nguyen, James Pan, Ian D Connolly, Anand Veeravagu, Rita Popat, John K Ratliff, Gerald A Grant
STUDY DESIGN: Systematic review and meta-analysis. OBJECTIVE: The aim of this study was to systematically evaluate the diagnostic utility of intraoperative neurophysiological monitoring (IONM) for detecting postoperative injury in resection of intramedullary spinal cord tumors (IMSCT). SUMMARY OF BACKGROUND DATA: Surgical management of IMSCT can involve key neurological and vascular structures. IONM aims to assess the functional integrity of susceptible elements in real time...
June 23, 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28650602/intraoperative-neurophysiological-monitoring-to-protect-the-facial-nerve-during-microsurgery-for-large-vestibular-schwannomas
#20
(no author information available yet)
OBJECTIVE: Microsurgery is the preferred treatment for large vestibular schwannomas (VSs). However, anatomical and functional preservation of the facial nerve (FN) remains a challenge during this surgery. The aim of this study was to determine whether it is beneficial to the preservation rates of the FN during microsurgical treatment of large VSs using intraoperative neurophysiological monitoring (IONM). METHODS: We retrospectively reviewed 53 patients with large VSs that underwent microsurgical resection via the retrosigmoid approach in our department during April 2009 to March 2016...
May 26, 2017: Neuro Endocrinology Letters
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