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Neurophysiology monitoring

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https://www.readbyqxmd.com/read/29160560/a-functional-near-infrared-spectroscopy-study-of-trauma-related-auditory-and-olfactory-cues-posttraumatic-stress-disorder-or-combat-experience
#1
Michael A Gramlich, Sandra M Neer, Deborah C Beidel, Corey J Bohil, Clint A Bowers
The prevalence of posttraumatic stress disorder (PTSD) among U.S. veterans deployed to Iraq or Afghanistan necessitates the need for comprehensive assessment and treatment strategies. This study investigated the utility of a combat-related PTSD symptom provocation paradigm to elicit unique neurological responses across three groups: combat veterans with PTSD, combat veterans without PTSD, and nonmilitary participants without PTSD. Using functional near-infrared spectroscopy (fNIRS) the results indicated that combat veterans with PTSD demonstrated significant activation to a trauma-related sound compared with nonmilitary personnel, channel 14: d = 1...
November 21, 2017: Journal of Traumatic Stress
https://www.readbyqxmd.com/read/29155115/transtentorial-distortion-syndrome-a-consistent-complication-following-lateral-and-fourth-ventricular-shunting-in-adults
#2
Claudia L Craven, Irene Baudracco, Simon D Thompson, Lewis Thorne, Laurence D Watkins, Ahmed K Toma
BACKGROUND: Complex hydrocephalus affecting lateral and fourth ventricles separately is occasionally managed with CSF diversion via supra- and infra-tentorial ventricular catheters. The optimal configuration to reduce complications is currently unknown in adults. We describe a consistently similar clinical presentation of patients with complex hydrocephalus and a fourth ventricle separately drained by infra-tentorial shunt insertion. METHODS: A retrospective single centre case series...
November 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29147795/preoperative-pregabalin-has-no-effect-on-intraoperative-neurophysiological-monitoring-in-adolescents-undergoing-posterior-spinal-fusion-for-spinal-deformities-a-double-blind-randomized-placebo-controlled-clinical-trial
#3
Linda Helenius, Antti Puhakka, Tuula Manner, Olli Pajulo, Ilkka Helenius
PURPOSE: This study was designed to evaluate the effect of preoperative pregabalin on intraoperative neurophysiological monitoring in adolescents undergoing surgery for spinal deformities. METHODS: Thirty-one adolescents undergoing posterior spinal fusion were randomized to receive preoperatively either pregabalin 2 mg/kg twice daily or placebo. The ability to make reliable intraoperative neurophysiological measurements, transcranial motor (MEPs) and sensory evoked potentials (SSEP) was evaluated...
November 17, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29146376/wronger-than-wrong-graded-mapping-of-the-errors-of-an-avatar-in-the-performance-monitoring-system-of-the-onlooker
#4
G Spinelli, G Tieri, E F Pavone, S M Aglioti
EEG studies show that observing errors in one's own or others' actions triggers specific electro-cortical signatures in the onlooker's brain, but whether the brain error-monitoring system operates according to graded or discrete rules is still largely unknown. To explore this issue, we combined immersive virtual reality with EEG recording in participants who observed an avatar reaching-to-grasp a glass from a first-person perspective. The avatar could perform correct or erroneous actions. Erroneous grasps were defined as small or large depending on the magnitude of the trajectory deviation from the to-be-grasped glass...
November 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/29134342/an-introduction-and-overview-of-machine-learning-in-neurosurgical-care
#5
REVIEW
Joeky T Senders, Mark M Zaki, Aditya V Karhade, Bliss Chang, William B Gormley, Marike L Broekman, Timothy R Smith, Omar Arnaout
BACKGROUND: Machine learning (ML) is a branch of artificial intelligence that allows computers to learn from large complex datasets without being explicitly programmed. Although ML is already widely manifest in our daily lives in various forms, the considerable potential of ML has yet to find its way into mainstream medical research and day-to-day clinical care. The complex diagnostic and therapeutic modalities used in neurosurgery provide a vast amount of data that is ideally suited for ML models...
November 13, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29132379/effects-of-somatosensory-electrical-stimulation-on-motor-function-and-cortical-oscillations
#6
Adelyn P Tu-Chan, Nikhilesh Natraj, Jason Godlove, Gary Abrams, Karunesh Ganguly
BACKGROUND: Few patients recover full hand dexterity after an acquired brain injury such as stroke. Repetitive somatosensory electrical stimulation (SES) is a promising method to promote recovery of hand function. However, studies using SES have largely focused on gross motor function; it remains unclear if it can modulate distal hand functions such as finger individuation. OBJECTIVE: The specific goal of this study was to monitor the effects of SES on individuation as well as on cortical oscillations measured using EEG, with the additional goal of identifying neurophysiological biomarkers...
November 13, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29113579/use-of-research-interfaces-for-psychophysical-studies-with-cochlear-implant-users
#7
Ruth Y Litovsky, Matthew J Goupell, Alan Kan, David M Landsberger
A growing number of laboratories are using research interfaces to conduct experiments with cochlear-implant (CI) users. Because these interfaces bypass a subject's clinical sound processor, several concerns exist regarding safety and stimulation levels. Here we suggest best-practice approaches for how to safely and ethically perform this type of research and highlight areas of limited knowledge where further research is needed to help clarify safety limits. The article is designed to provide an introductory level of technical detail about the devices and the effects of electrical stimulation on perception and neurophysiology...
January 2017: Trends in Hearing
https://www.readbyqxmd.com/read/29110082/continuous-monitoring-of-the-recurrent-laryngeal-nerve
#8
Aitor De la Quintana Basarrate, Arantza Iglesias Martínez, Iciar Salutregui, Leire Agirre Etxabe, Ainhoa Arana González, Izaskun Yurrebaso Santamaría
OBJECTIVE: The objective of this study was to assess the safety and utility of continuous intraoperative neuromonitoring for the prevention of recurrent laryngeal nerve injury during thyroidectomy. METHODS: A prospective cohort study was conducted in consecutive patients undergoing thyroidectomy. Variations in amplitude and distal latency of the electromyogram (EMG) were assessed. In the case of suspicious events, restorative manoeuvers were performed to attempt to recover the potentials...
November 6, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/29101613/retained-medullary-cord-extending-to-a-sacral-subcutaneous-meningocele
#9
Nobuya Murakami, Takato Morioka, Takafumi Shimogawa, Kimiaki Hashiguchi, Nobutaka Mukae, Kazuyoshi Uchihashi, Satoshi O Suzuki, Koji Iihara
BACKGROUND: A retained medullary cord (RMC) is a rare closed spinal dysraphism with a robust elongated neural structure continuous from the conus and extending to the dural cul-de-sac. One case extending down to the base of a subcutaneous meningocele at the sacral level has been reported. CLINICAL PRESENTATION: We report on three cases of closed spinal dysraphism, in which a spinal cord-like tethering structure extended out from the dural cul-de-sac and terminated at a skin-covered meningocele sac in the sacrococcygeal region, which was well delineated in curvilinear coronal reconstructed images of 3D-heavily T2-weighted images (3D-hT2WI)...
November 3, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29076463/-application-of-intraoperative-electromagnetic-frameless-navigation-in-transcranial-and-endoscopic-neurosurgical-interventions
#10
V A Shurkhay, S A Goryaynov, M A Kutin, S A Eolchiyan, D N Capitanov, D V Fomichev, P L Kalinin, A N Shkarubo, D N Kopachev, A G Melikyan, M V Nersesyan, A M Shkatova, A N Konovalov, A A Potapov
The paper summarizes the experience in using a system of electromagnetic intraoperative frameless navigation in various neurosurgical pathologies of the brain. The electromagnetic navigation technique was used for 102 operations in 98 patients, including 36 transnasal endoscopic interventions. There were no intraoprtative and postoperative complications associated with the use of the system. In the process of using the system, factors influencing the accuracy of navigation and requiring additional control by the surgeon were identified...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/29075532/spinal-nerves-schwannomas-experience-on-367-cases-historic-overview-on-how-clinical-radiological-and-surgical-practices-have-changed-over-a-course-of-60-years
#11
Jacopo Lenzi, Giulio Anichini, Alessandro Landi, Alfonso Piciocchi, Emiliano Passacantilli, Francesca Pedace, Roberto Delfini, Antonio Santoro
BACKGROUND: Spinal schwannomas are common benign spinal tumors. Their treatment has significantly evolved over the years, and preserving neurological functions has become one of the main treatment goals together with tumor resection. STUDY DESIGN AND AIMS: Retrospective review focused on clinical assessment, treatment techniques, and outcomes. METHODS: A retrospective study on our surgical series was performed. Clinical and operative data were analyzed...
2017: Neurology Research International
https://www.readbyqxmd.com/read/29070752/a-surgical-case-of-mesial-temporal-lobe-epilepsy-associated-with-hippocampal-sclerosis-and-traumatic-neocortical-lesion
#12
Yu Kitazawa, Kazutaka Jin, Masaki Iwasaki, Hiroyoshi Suzuki, Fumiaki Tanaka, Nobukazu Nakasato
A 26-year-old right-handed woman, with a history of left temporal lobe contusion caused by a fall at the age of 9 months, started to have complex partial seizures with oral automatism at the age of 7 years. The seizures occurred once or twice a month despite combination therapy with several antiepileptic agents. Her history and imaging studies suggested the diagnosis of epilepsy arising from traumatic neocortical temporal lesion. Comprehensive assessment including long-term video EEG monitoring, MRI, FDG-PET, MEG, and neuropsychological evaluation was performed at the age of 26 years...
October 26, 2017: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/29066230/intraoperative-neurophysiologic-monitoring-ionm-changes-associated-with-a-case-of-delayed-thalamic-infarct-implications-for-postoperative-management
#13
Forough Ghavami, Omar Choudhri, Michael Marks, Jaime R López
Treatment of cerebral aneurysms poses a risk of cerebral hemorrhage and/or ischemia; these potential sequelae are usually associated with changes in intraoperative neurophysiologic monitoring (IONM) modalities. Our case demonstrates a patient with significant changes in IONM during the treatment of a right posterior cerebral artery aneurysm who did not develop neurologic deficits until three days postoperatively. IONM changes can represent a guide in postoperative patient management and may pose grounds for closer monitoring of patients with IONM changes that do not develop immediate postoperative deficits...
October 21, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29060081/a-preliminary-study-to-identify-a-neurophysiological-correlate-of-electroacoustic-pitch-matching-in-cochlear-implant-users
#14
Chin-Tuan Tan
One challenge facing postlingually-deafened cochlear implant (CI) users is the frequency mismatch between the incoming acoustic signal and the characteristic frequency of the electrically stimulated neurons. Current CI is an open-loop system and it requires extensive fine-tuning to help users to adapt to this mismatch over time. Electric-acoustic pitch matching in unilateral cochlear implant (CI) participants who has residual hearing in the non-implanted ear had been shown to serve as a useful metric to monitor adaptation process...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29057365/a-rare-case-of-intramedullary-solitary-juvenile-xanthogranuloma-of-the-lumbar-spine-in-the-adult-a-case-report
#15
Vania Pirillo, Andrea Prontera, Paolo Rizzo, Paolo Cipriano Cecchi, Martin Maffei, Andreas Schwarz
Solitary juvenile xanthogranuloma (SJX) of the spine is an extremely rare proliferative histiocytic disorder with only few cases reported in literature. We present the first case of intramedullary spinal SJX. A 22-year-old male presented with a nine-month history of progressively worsening sphincteric disturbances and saddle hypoesthesia. Magnetic resonance imaging showed an intra-axial lesion located in the conus medullaris; T1 hypointense, T2 iso-hyperintense and uniformly enhancing after contrast administration...
September 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29054540/do-sport-related-concussions-result-in-long-term-cognitive-impairment-a-review-of-event-related-potential-research
#16
Christopher J Brush, Peter J Ehmann, Ryan L Olson, Walter R Bixby, Brandon L Alderman
Sport-related concussions have become a major public health concern although the long-term effects on cognitive function remain largely unknown. Event-related potentials (ERPs) are ideal for studying the long-term impact of sport-related concussions, as they have excellent temporal precision and provide insight that cannot be obtained from behavioral or neuropsychological measures alone. We reviewed all available published studies that have used stimulus or response-locked ERPs to document cognitive control processes in individuals with a history of concussion...
October 18, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29050170/-a-chinese-experts-consensus-of-neurophysiological-evaluating-for-microvascular-decompression
#17
(no author information available yet)
With the extensive development of microvascular decompression (MVD), perioperative neurophysiological monitoring technology is also developping rapidly in our country. To promote the standardization of neurophysiological monitoring for MVD in China, the experts consensus was published. This consensus includes five sections: indications, stimulation and recording methods, intraoperative assessment and warning criteria, influencing factors, and clinical application recommendations. Furthermore, recommendations for selection of electrophysiological monitoring and recording requirements were attached...
October 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29040672/unsupervised-learning-of-spatiotemporal-interictal-discharges-in-focal-epilepsy
#18
Maxime O Baud, Jonathan K Kleen, Gopala K Anumanchipalli, Liberty S Hamilton, Yee-Leng Tan, Robert Knowlton, Edward F Chang
BACKGROUND: Interictal epileptiform discharges are an important biomarker for localization of focal epilepsy, especially in patients who undergo chronic intracranial monitoring. Manual detection of these pathophysiological events is cumbersome, but is still superior to current rule-based approaches in most automated algorithms. OBJECTIVE: To develop an unsupervised machine-learning algorithm for the improved, automated detection and localization of interictal epileptiform discharges based on spatiotemporal pattern recognition...
October 10, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29023306/medical-error-avoidance-in-intraoperative-neurophysiological-monitoring-the-communication-imperative
#19
Stan Skinner, Robert Holdefer, John J McAuliffe, Francesco Sala
Error avoidance in medicine follows similar rules that apply within the design and operation of other complex systems. The error-reduction concepts that best fit the conduct of testing during intraoperative neuromonitoring are forgiving design (reversibility of signal loss to avoid/prevent injury) and system redundancy (reduction of false reports by the multiplication of the error rate of tests independently assessing the same structure). However, error reduction in intraoperative neuromonitoring is complicated by the dichotomous roles (and biases) of the neurophysiologist (test recording and interpretation) and surgeon (intervention)...
November 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29018811/high-frequency-eeg-variations-in-children-with-autism-spectrum-disorder-during-human-faces-visualization
#20
Celina A Reis Paula, Camille Reategui, Bruna Karen de Sousa Costa, Caio Queiroz da Fonseca, Luana da Silva, Edgard Morya, Fabricio Lima Brasil
Autism spectrum disorder (ASD) is a neuropsychiatric disorder characterized by the impairment in the social reciprocity, interaction/language, and behavior, with stereotypes and signs of sensory function deficits. Electroencephalography (EEG) is a well-established and noninvasive tool for neurophysiological characterization and monitoring of the brain electrical activity, able to identify abnormalities related to frequency range, connectivity, and lateralization of brain functions. This research aims to evidence quantitative differences in the frequency spectrum pattern between EEG signals of children with and without ASD during visualization of human faces in three different expressions: neutral, happy, and angry...
2017: BioMed Research International
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