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Neurophysiology monitoring

Marie Luise Schreiter, Witold Chmielewski, Christian Beste
There is a strong inter-relation of cognitive and emotional processes as evidenced by emotional conflict monitoring processes. In the cognitive domain, proactive effects of conflicts have widely been studied; i.e. effects of conflicts in the n-1 trial on trial n. Yet, the neurophysiological processes and associated functional neuroanatomical structures underlying such proactive effects during emotional conflicts have not been investigated. This is done in the current study combining EEG recordings with signal decomposition methods and source localization approaches...
March 9, 2018: NeuroImage
P Moscatiello, D Carracedo Calvo, L Yupanqui Guerra, M E Rivera Martínez, A Mendiola de la Hoza, M Sánchez Encinas
INTRODUCTION: Pudendal nerve entrapment syndrome (PNE) is characterised by the presence of neuropathic pain in the pudendal nerve (PN) territory, associated or not with urinary, defecatory and sexual disorders. Surgical PN decompression is an effective and safe alternative for cases when conservative treatment fails. The aim of this study is to describe the first robot-assisted pudendal neurolysis procedure performed in our country. MATERIAL AND METHODS: We describe step by step the technique of robot-assisted laparoscopic neurolysis of the left PN performed with intraoperative neurophysiological monitoring on a 60-year-old patient diagnosed with left PNE...
March 8, 2018: Actas Urologicas Españolas
Byoung Hun Lee, Seung-Jae Hyun, Ki-Jeong Kim, Tae-Ahn Jahng, Yongjung J Kim, Hyun-Jib Kim
OBJECTIVE: The aim of this study was to investigate clinical and radiological outcomes of patients who underwent posterior vertebral column resection (PVCR) by a single neurosurgeon in a single institution. METHODS: Thirty-four consecutive patients with severe spinal deformities who underwent PVCR between 2010 and 2016 were enrolled. The radiographic measurements included a kyphotic angle of PVCR levels (VCR angle), sagittal vertical axis (SVA), thoracic kyphosis, lumbar lordosis (LL), and spinopelvic parameters...
March 2018: Journal of Korean Neurosurgical Society
Michael R Riley, Adam T Doan, Richard W Vogel, Alexander O Aguirre, Kayla S Pieri, Edward H Scheid
Background Context Intraoperative neurophysiological monitoring (IONM) has gained rather wide-spread acceptance as a method to mitigate risk to the lumbar plexus during Lateral Lumbar Interbody Fusion (LLIF) surgery. The most common approach to IONM involves using only electromyography (EMG) monitoring, and the rate of postoperative deficit remains unacceptably high. Other test modalities, such as transcranial electric motor-evoked potentials (tcMEPs) and somatosensory-evoked potentials (SSEPs), may be more suitable for monitoring neural integrity but they have not been widely adopted during LLIF...
March 2, 2018: Spine Journal: Official Journal of the North American Spine Society
Orhan Bican, Charles Cho, Leslie Lee, Viet Nguyen, Scheherazade Le, Jeremy Heit, Jaime Lopez
A middle-aged patient underwent staged endovascular embolization of a Spetzler-Martin grade V right parietal arteriovenous malformation(AVM).In the fifth endovascular embolization, after methohexital 10 mg injection into a right posterior choroidal artery feeding the AVM nidus, there was an immediate change in the electroencephalogram (EEG) with simultaneous loss of motor evoked potentials (MEPs) in the bilateral upper and lower extremities and a delayed change in somatosensory evoked potential responses (SSEPs)...
February 25, 2018: Clinical Imaging
Pooja Parikh, Justin Cheongsiatmoy, Parastou Shilian, Andres A Gonzalez
PURPOSE: Transcranial motor evoked potentials (TcMEPs) are the preferred modality to monitor the integrity of motor pathways during surgery. Recently, it has also been used as a method to help with detection of nerve roots injuries. Adequate baseline muscle responses are vital to detect nerve injury. We have observed that TcMEP responses are not homogeneous across multiple myotomes, but this has not been studied systematically. Our objective is to determine whether there are any relative differences in amplitude or morphology of TcMEPs across various lower extremity muscles...
March 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
Davide Gheza, Rudi De Raedt, Chris Baeken, Gilles Pourtois
Effort expenditure has an aversive connotation and it can lower hedonic feelings. In this study, we explored the electrophysiological correlates of the complex interplay of reward processing with cost anticipation. To this aim, healthy adult participants performed a gambling task where the outcome (monetary reward vs. no-reward) and its expectancy were manipulated on a trial by trial basis while 64-channel EEG was recorded. Crucially, on some trials, the no-reward outcome could be transformed to a rewarding one, pending effort expenditure by means of an orthogonal dot clicking task, enabling us to compare at the electrophysiological level reward processing when cost was anticipated or not...
February 26, 2018: NeuroImage
Vitória Piai, Sandra H Vos, Reinhard Idelberger, Pauline Gans, Jonne Doorduin, Mark Ter Laan
Objective: We report the case of a professional violin player who underwent an awake craniotomy to resect a tumor in the left supplementary motor area, an area involved in motor planning. Method: A careful pre- and intraoperative monitoring plan for music performance and complex motor function was established that could be used in combination with cortical stimulation. Results: The patient suffered an epileptic seizure during cortical stimulation...
February 27, 2018: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
W O Tatum, G Rubboli, P W Kaplan, S M Mirsatari, K Radhakrishnan, D Gloss, L O Caboclo, F W Drislane, M Koutroumanidis, D L Schomer, D Kastelijn-Nolst Trenite, Mark Cook, S Beniczky
Electroencephalography (EEG) remains an essential diagnostic tool for people with epilepsy (PWE). The International Federation of Clinical Neurophysiology produces new guidelines as an educational service for clinicians to address gaps in knowledge in clinical neurophysiology. The current guideline was prepared in response to gaps present in epilepsy-related neurophysiological assessment and is not intended to replace sound clinical judgement in the care of PWE. Furthermore, addressing specific pathophysiological conditions of the brain that produce epilepsy is of primary importance though is beyond the scope of this guideline...
February 1, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
Kyoko Nagao, Thierry Morlet, Elizabeth Haley, Jennifer Padilla, Julianne Nemith, Robert W Mason, Shunji Tomatsu
BACKGROUND: Hearing impairment is a common problem in patients with mucopolysaccharidosis IV (MPS IV) throughout their life. Many of the adult patients with MPS IV exhibit permanent or severe hearing loss. However, there has been no systematic review of detailed audiological test results in MPS IV. MATERIALS AND METHODS: Fourteen individuals with MPS IV (13 MPS IVA and 1 MPS IVB; aged between 12 and 38 years old) participated in the current study. We obtained auditory neurophysiological responses (auditory brainstem responses and otoacoustic emissions test) in addition to pure-tone audiometry and middle ear function tests (tympanometry and acoustic reflexes)...
February 8, 2018: Molecular Genetics and Metabolism
Ildikó Nagy, Dániel Fabó
Neurophysiological methods are gaining ground in the diagnosis and therapy of cerebrovascular disease. While the role of the EEG (electroencephalography) in the diagnosis of post-stroke epilepsy is constant, quantitative EEG para-meters, as new indicators of early efficiency after thrombolysis or in prognosis of patient's condition have proved their effectiveness in several clinical studies. In intensive care units, continuous EEG monitoring of critically ill patients became part of neurointenzive care protocols...
January 30, 2018: Ideggyógyászati Szemle
Ying Chen, Weihai Xu, Lijuan Wang, Xiaoming Yin, Jie Cao, Fang Deng, Yingqi Xing, Jiachun Feng
BACKGROUND: Neurological deterioration after intracerebral hemorrhage (ICH) is thought to be closely related to increased intracranial pressure (ICP), decreased cerebral blood flow (CBF), and brain metabolism. Transcranial Doppler (TCD) is increasingly used as an indirect measure of ICP, and quantitative EEG (QEEG) can reflect the coupling of CBF and metabolism. We aimed to combine TCD and QEEG to comprehensively assess brain function after ICH and provide prognostic diagnosis. METHODS: We prospectively enrolled patients with severe acute supratentorial (SAS)-ICH from June 2015 to December 2016...
February 20, 2018: Critical Care: the Official Journal of the Critical Care Forum
Miran Skrap, Maria Caterina Vescovi, Giada Pauletto, Marta Maieron, Tomasino Barbara, Daniele Bagatto, Francesco Tuniz
BACKGROUND: Cavernous malformations (CMs) are congenital malformations and may be located anywhere in the brain. We present a series of CMs located close to or inside of the motor-sensory cortex or corticospinal tract (CST) with clinical onset due to hemorrhage or mass effect. In such cases, surgery becomes an acceptable option. OBJECTIVE: To evaluate the role of diffusion tensor imaging (DTI), functional-magnetic-resonance imaging (fMRI), intraoperative neurophysiological monitoring, neuronavigation, and brain-mapping and the clinical results of surgical treatment of CMs in this critical location...
February 16, 2018: Operative Neurosurgery (Hagerstown, Md.)
Yu Shikano, Yuji Ikegaya, Takuya Sasaki
Behavioral and cognitive studies have demonstrated that brain functions are affected by the activity states of the peripheral organs, such as the cardiac and respiratory systems. However, detailed neurophysiological mechanisms underlying the body-brain interactions remain unknown. In this study, we developed a method for manipulating activity levels of the heart using direct cardiac stimulation and vagus nerve stimulation that can be combined with recording cerebral local field potentials using a microdrive system, electrocardiograms, electromyograms, in a freely moving rat...
February 15, 2018: Neuroscience Research
Alessandro Della Puppa, Marta Rossetto, Francesco Volpin, Oriela Rustemi, Alberto Grego, Alessandra Gherardi, Riccardo Ortolan, Francesco Causin, Marina Munari, Renato Scienza
OBJECTVE: The aim of this study is to report data on a multimodal monitoring strategy based on the intraoperative use of neurophysiological monitoring, flowmetry by microflow probe and intraoperative indocyanine green-videoangiography (ICG-VA) during microsurgical clipping of intracranial aneurysms. METHODS: This retrospective analysis was performed on 85 consecutive patients undergoing clipping of 96 intracranial aneurysms with the present monitoring strategy. Patient outcomes were evaluated by assessing rate of aneurysm exclusion and post-operative occurrence of ischemic injury...
February 13, 2018: World Neurosurgery
Olga Cozzolino, Maria Marchese, Francesco Trovato, Enrico Pracucci, Gian Michele Ratto, Maria Gabriella Buzzi, Federico Sicca, Filippo M Santorelli
Spreading depression (SD) is a neurophysiological phenomenon characterized by abrupt changes in intracellular ion gradients and sustained depolarization of neurons. It leads to loss of electrical activity, changes in the synaptic architecture, and an altered vascular response. Although SD is often described as a unique phenomenon with homogeneous characteristics, it may be strongly affected by the particular triggering event and by genetic background. Furthermore, SD may contribute differently to the pathogenesis of widely heterogeneous clinical conditions...
2018: Frontiers in Neurology
Mattia Arlotti, Sara Marceglia, Guglielmo Foffani, Jens Volkmann, Andres M Lozano, Elena Moro, Filippo Cogiamanian, Marco Prenassi, Tommaso Bocci, Francesca Cortese, Paolo Rampini, Sergio Barbieri, Alberto Priori
OBJECTIVES: To assess the feasibility and clinical efficacy of local field potentials (LFPs)-based adaptive deep brain stimulation (aDBS) in patients with advanced Parkinson disease (PD) during daily activities in an open-label, nonblinded study. METHODS: We monitored neurophysiologic and clinical fluctuations during 2 perioperative experimental sessions lasting for up to 8 hours. On the first day, the patient took his/her daily medication, while on the second, he/she additionally underwent subthalamic nucleus aDBS driven by LFPs beta band power...
February 14, 2018: Neurology
Ilyas M Eli, Nicholas T Gamboa, Jian Guan, Philipp Taussky
BACKGROUND: The use of intraoperative neurophysiologic monitoring (IOM) has become commonplace in many neurosurgical procedures as a tool to reduce the risk of complications through the early identification of reversible neurologic compromise. Although complications related to IOM itself are exceedingly rare, recognizing their clinical presentation in the postoperative neurosurgical patient is essential for the early identification and implementation of appropriate treatment. CASE DESCRIPTION: The authors present a case report of a patient who developed postoperative acute compartment syndrome in the right arm after placement of neuromonitoring needles for routine IOM during endovascular treatment of a left internal carotid artery aneurysm...
February 3, 2018: World Neurosurgery
Xiaomei Cong, Divya Ramesh, Mallory Perry, Wanli Xu, Katherine M Bernier, Erin E Young, Stephen Walsh, Angela Starkweather
Irritable bowel syndrome (IBS) is a functional gut disorder that typically manifests in early adult years. IBS patients report that pain is the most distressing symptom with the greatest impact on quality of life. Pain-sensitivity genes and the gut microbiome may influence severity of symptoms as well as response to self-management (SM) interventions. Based on current understanding of the science of SM, pain neurophysiology, and the gut-brain axis, our team developed a pain SM intervention to be added to evidence-based self-management instruction to increase the individual's SM knowledge and skills (self-efficacy, self-regulation, and goal-setting)...
February 1, 2018: Research in Nursing & Health
V K Benzy, E A Jasmin, Rachel Cherian Koshy, Frank Amal, K P Indiradevi
The advancement in medical research and intelligent modeling techniques has lead to the developments in anaesthesia management. The present study is targeted to estimate the depth of anaesthesia using cognitive signal processing and intelligent modeling techniques. The neurophysiological signal that reflects cognitive state of anaesthetic drugs is the electroencephalogram signal. The information available on electroencephalogram signals during anaesthesia are drawn by extracting relative wave energy features from the anaesthetic electroencephalogram signals...
2018: Journal of Integrative Neuroscience
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