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Neurophysiology

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https://www.readbyqxmd.com/read/28650882/diagnostic-utility-of-intraoperative-neurophysiological-monitoring-for-intramedullary-spinal-cord-tumors-systematic-review-and-meta-analysis
#1
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
#2
(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
https://www.readbyqxmd.com/read/28650061/-effectiveness-of-education-based-on-neuroscience-in-the-treatment-of-musculoskeletal-chronic-pain
#3
J D Cuenda-Gago, L Espejo-Antunez
INTRODUCTION: Chronic pain is one of the most frequent health, economic and social problems. Given this, numerous approaches have been described, one of which is pain neuroscience education. AIM: To examine the effectiveness of pain neuroscience education in the treatment of musculoskeletal disorders with chronic pain and to explore the impact of specific aspects of the technique on its effectiveness. MATERIAL AND METHODS: Relevant studies published between 2000 and 2015 were identified by searching PubMed, Scopus and Web of Science...
July 1, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28649992/a-key-role-for-neurotensin-in-chronic-stress-induced-anxiety-like-behaviour-in-rats
#4
Catherine P Normandeau, Ana Paula Ventura Silva, Emily R Hawken, Staci Angelis, Calvin Sjaarda, Xudong Liu, José Miguel Pêgo, Éric C Dumont
Chronic stress is a major cause of anxiety disorders that can be reliably modeled pre-clinically, providing insight into alternative therapeutic targets for this mental health illness. Neuropeptides have been targeted in the past to no avail possibly due to our lack of understanding of their role in pathological models. In this study we use a rat model of chronic stress-induced anxiety-like behaviours and hypothesized that neuropeptidergic modulation of synaptic transmission would be altered in the Bed Nucleus of the Stria Terminalis (BNST), a brain region suspected to contribute to anxiety disorders...
June 26, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28649490/frequency-dependent-changes-in-local-intrinsic-oscillations-in-chronic-primary-insomnia-a-study-of-the-amplitude-of-low-frequency-fluctuations-in-the-resting-state
#5
Fuqing Zhou, Suhua Huang, Ying Zhuang, Lei Gao, Honghan Gong
New neuroimaging techniques have led to significant advancements in our understanding of cerebral mechanisms of primary insomnia. However, the neuronal low-frequency oscillation remains largely uncharacterized in chronic primary insomnia (CPI). In this study, the amplitude of low-frequency fluctuation (ALFF), a data-driven method based on resting-state functional MRI, was used to examine local intrinsic activity in 27 patients with CPI and 27 age-, sex-, and education-matched healthy controls. We examined neural activity in two frequency bands, slow-4 (between 0...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28649194/seeing-double-exploring-the-phenomenology-of-self-reported-absence-of-rivalry-in-bistable-pictures
#6
Elisa Filevich, Maxi Becker, Yuan-Hao Wu, Simone Kühn
Ambiguous images such as Rubin's vase-face can be interpreted in at least two different ways. These interpretations are typically taken to be mutually exclusive, and ambiguous images have thus served as models of perceptual competition. Here, we present data that challenges this view. In an online survey, we found that a large proportion of people within the general population reported that the two percepts were not competing but could be perceived simultaneously. Of those who reported that they could see both percepts simultaneously, we invited 17 participants to take part in a functional magnetic resonance imaging (fMRI) experiment...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28648891/implications-of-the-vienna-integrated-model-of-art-perception-for-art-based-interventions-in-clinical-populations-comment-on-move-me-astonish-me-delight-my-eyes-and-brain-the-vienna-integrated-model-of-top-down-and-bottom-up-processes-in-art-perception-vimap
#7
https://www.readbyqxmd.com/read/28648497/selective-optogenetic-control-of-purkinje-cells-in-monkey-cerebellum
#8
Yasmine El-Shamayleh, Yoshiko Kojima, Robijanto Soetedjo, Gregory D Horwitz
Purkinje cells of the primate cerebellum play critical but poorly understood roles in the execution of coordinated, accurate movements. Elucidating these roles has been hampered by a lack of techniques for manipulating spiking activity in these cells selectively-a problem common to most cell types in non-transgenic animals. To overcome this obstacle, we constructed AAV vectors carrying the channelrhodopsin-2 (ChR2) gene under the control of a 1 kb L7/Pcp2 promoter. We injected these vectors into the cerebellar cortex of rhesus macaques and tested vector efficacy in three ways...
June 21, 2017: Neuron
https://www.readbyqxmd.com/read/28647483/demands-on-response-inhibition-processes-determine-modulations-of-theta-band-activity-in-superior-frontal-areas-and-correlations-with-pupillometry-implications-for-the-norepinephrine-system-during-inhibitory-control
#9
Gabriel Dippel, Moritz Mückschel, Tjalf Ziemssen, Christian Beste
Response inhi bition processes are important for goal-directed behavior and particularly demanded when it is unlikely to inhibit automatically executed responses. It has been suggested that the norepinephrine (NE) system is important to consider for such likelihood effects. As an indirect measure of the NE system activity we used the pupil diameter and integrated this data with neurophysiological (EEG) data and beamforming analyses. The study shows that inhibitory control processes reflected by theta oscillations are strongly modulated by the likelihood to employ these processes and that these mechanisms were related to neural processes in the SMA and SFG...
June 21, 2017: NeuroImage
https://www.readbyqxmd.com/read/28646563/cohesive-network-reconfiguration-accompanies-extended-training
#10
Qawi K Telesford, Arian Ashourvan, Nicholas F Wymbs, Scott T Grafton, Jean M Vettel, Danielle S Bassett
Human behavior is supported by flexible neurophysiological processes that enable the fine-scale manipulation of information across distributed neural circuits. Yet, approaches for understanding the dynamics of these circuit interactions have been limited. One promising avenue for quantifying and describing these dynamics lies in multilayer network models. Here, networks are composed of nodes (which represent brain regions) and time-dependent edges (which represent statistical similarities in activity time series)...
June 24, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28645699/the-forgotten-artist-why-to-consider-intentions-and-interaction-in-a-model-of-aesthetic-experience-comment-on-move-me-astonish-me-delight-my-eyes-and-brain-the-vienna-integrated-model-of-top-down-and-bottom-up-processes-in-art-perception-vimap-and-corresponding
#11
https://www.readbyqxmd.com/read/28644766/independent-development-of-imagination-and-perception-of-fitts-law-in-late-childhood-and-adolescence
#12
Emma Yoxon, Timothy N Welsh
Recent neurophysiological and behavioral research suggests perception-action systems are tightly coupled. Accordingly, Fitts' law has been observed when individuals execute, perceive, and imagine actions. Developmental research has found that (a) children demonstrate Fitts' law in imagined actions and (b) imagined movement time (MT) becomes closer to actual MT as age increases. However, action execution, imagination, and perception have yet to be assessed together in children. The authors investigated how imagined and perceived MTs related to actual MTs in children and adolescents...
June 23, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28642996/central-conduction-abnormalities-in-patients-receiving-levodopa-carbidopa-intestinal-gel-infusion
#13
Francesco Bove, Marco Luigetti, Lara Gallicchio, Valentina Recchia, Antonella Petruzzellis, Riccardo Di Iorio, Filippo Tamma, Alfonso Fasano
In recent years, several studies have reported a relatively high frequency of polyneuropathy in patients with Parkinson's disease (PD), in particular, in patients receiving levodopa-carbidopa intestinal gel (LCIG) infusion. In spite of the several patients investigated with nerve conduction studies, no study has prospectively explored a possible central nervous system involvement of patients receiving LCIG infusion. We prospectively evaluated eight PD patients receiving LCIG infusion, who underwent neurophysiological evaluations with nerve conduction studies, visual, somatosensory and motor evoked potentials before LCIG infusion, and 1 and 6 months after...
June 22, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28642851/sarcopenia-neurological-point-of-view
#14
REVIEW
Young Nam Kwon, Sung Sang Yoon
Sarcopenia is an age-related geriatric syndrome which is characterized by the gradual loss of muscle mass, muscle strength, and muscle quality. There are a lot of neurologic insults on sarcopenia at various levels from the brain to the neuromuscular junctions (NMJs) to generate a volitional task. Dopaminergic downregulation, inadequate motor programming and motor coordination impairment lead to decline of supraspinal drive. Motor unit reorganization and inflammatory changes in motor neuron decrease conduction velocity and amplitude of compound muscle action potential...
May 2017: Journal of Bone Metabolism
https://www.readbyqxmd.com/read/28642548/hemodynamics-of-speech-production-an-fnirs-investigation-of-children-who-stutter
#15
B Walsh, F Tian, J A Tourville, M A Yücel, T Kuczek, A J Bostian
Stuttering affects nearly 1% of the population worldwide and often has life-altering negative consequences, including poorer mental health and emotional well-being, and reduced educational and employment achievements. Over two decades of neuroimaging research reveals clear anatomical and physiological differences in the speech neural networks of adults who stutter. However, there have been few neurophysiological investigations of speech production in children who stutter. Using functional near-infrared spectroscopy (fNIRS), we examined hemodynamic responses over neural regions integral to fluent speech production including inferior frontal gyrus, premotor cortex, and superior temporal gyrus during a picture description task...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28641848/the-use-of-embolic-protection-devices-is-associated-with-a-lower-stroke-and-death-rate-after-carotid-stenting
#16
Christoph Knappich, Andreas Kuehnl, Pavlos Tsantilas, Sofie Schmid, Thorben Breitkreuz, Michael Kallmayer, Alexander Zimmermann, Hans-Henning Eckstein
OBJECTIVES: The aim of this study was to analyze the association between intraprocedural and periprocedural variables and in-hospital stroke or death rate after carotid artery stenting. BACKGROUND: In Germany, all open surgical and endovascular procedures on the extracranial carotid artery must be documented in a statutory nationwide quality assurance database. METHODS: A total of 13,086 carotid artery stenting procedures for asymptomatic (63...
June 26, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28641453/accuracy-of-limited-montage-electroencephalography-in-monitoring-postanoxic-comatose-patients
#17
Sandipan Pati, Lauren McClain, Lidia Moura, Yuan Fan, M Brandon Westover
BACKGROUND: Continuous EEG (cEEG) monitoring may help to identify the small percentage of adults with hypoxic-ischemic encephalopathy (HIE) who will regain consciousness if allowed sufficient time. However, the limited yield in this population has led some to question the cost-effectiveness cEEG monitoring in this population. We hypothesized that limited-montage cEEG could provide essentially the same neurophysiologic information at lower cost. In this proof of concept study, we aim to demonstrate the potentials of limited channel EEG in prognostication in postanoxic patients...
June 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28640937/dreams-and-creative-problem-solving
#18
Deirdre Barrett
Dreams have produced art, music, novels, films, mathematical proofs, designs for architecture, telescopes, and computers. Dreaming is essentially our brain thinking in another neurophysiologic state-and therefore it is likely to solve some problems on which our waking minds have become stuck. This neurophysiologic state is characterized by high activity in brain areas associated with imagery, so problems requiring vivid visualization are also more likely to get help from dreaming. This article reviews great historical dreams and modern laboratory research to suggest how dreams can aid creativity and problem-solving...
June 22, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28639464/neurophysiological-analysis-of-the-genesis-mechanism-of-eeg-during-the-interictal-and-ictal-periods-using-a-multiple-neural-masses-model
#19
Zhen Ma
Electroencephalography (EEG) is an important method to investigate the neurophysiological mechanism underlying epileptogenesis to identify new therapies for the treatment of epilepsy. The neurophysiologically based neural mass model (NMM) can build a bridge between signal processing and neurophysiology, which can be used as a platform to explore the neurophysiological mechanism of epileptogenesis. Most EEG signals cannot be regarded as the outputs of a single NMM with identical model parameters. The outputs of NMM are simple because the diversity of neural signals in the same NMM is ignored...
April 11, 2017: International Journal of Neural Systems
https://www.readbyqxmd.com/read/28638926/-mechanisms-and-applications-of-transcutaneous-electrical-nerve-stimulation-in-analgesia
#20
Zheng-Yu Tang, Hui-Quan Wang, Xiao-Lei Xia, Yi Tang, Wei-Wei Peng, Li Hu
Transcutaneous electrical nerve stimulation (TENS), as a non-pharmacological and non-invasive analgesic therapy with low-cost, has been widely used to relieve pain in various clinical applications, by delivering current pulses to the skin area to activate the peripheral nerve fibers. Nevertheless, analgesia induced by TENS varied in the clinical practice, which could be caused by the fact that TENS with different stimulus parameters has different biological mechanisms in relieving pain. Therefore, to advance our understanding of TENS in various basic and clinical studies, we discussed (1) neurophysiological and biochemical mechanisms of TENS-induced analgesia; (2) relevant factors that may influence analgesic effects of TENS from the perspectives of stimulus parameters, including stimulated position, pulse parameters (current intensity, frequency, and pulse width), stimulus duration and used times in each day; and (3) applications of TENS in relieving clinical pain, including post-operative pain, chronic low back pain and labor pain...
June 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
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