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Frontiers in Neurology

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https://www.readbyqxmd.com/read/28326060/microbial-neuraminidase-induces-a-moderate-and-transient-myelin-vacuolation-independent-of-complement-system-activation
#1
Pablo Granados-Durán, María Dolores López-Ávalos, Manuel Cifuentes, Margarita Pérez-Martín, María Del Mar Fernández-Arjona, Timothy R Hughes, Krista Johnson, B Paul Morgan, Pedro Fernández-Llebrez, Jesús M Grondona
AIMS: Some central nervous system pathogens express neuraminidase (NA) on their surfaces. In the rat brain, a single intracerebroventricular (ICV) injection of NA induces myelin vacuolation in axonal tracts. Here, we explore the nature, the time course, and the role of the complement system in this damage. METHODS: The spatiotemporal analysis of myelin vacuolation was performed by optical and electron microscopy. Myelin basic protein-positive area and oligodendrocyte transcription factor (Olig2)-positive cells were quantified in the damaged bundles...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28326059/unilateral-cochlear-implantation-reduces-tinnitus-loudness-in-bimodal-hearing-a-prospective-study
#2
Jérôme J Servais, Karl Hörmann, Elisabeth Wallhäusser-Franke
Perceptive and receptive aspects of subjective tinnitus like loudness and tinnitus-related distress are partly independent. The high percentage of hearing loss in individuals with tinnitus suggests causality of hearing impairment particularly for the tinnitus percept, leading to the hypothesis that restoration of auditory input has a larger effect on tinnitus loudness than on tinnitus-related distress. Furthermore, it is assumed that high levels of depression or anxiety prevent reductions of tinnitus loudness and distress following restoration of activity in the cochlea...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28321203/clinical-and-epidemiological-correlates-of-task-specific-dystonia-in-a-large-cohort-of-brazilian-music-players
#3
Rita C Moura, Patrícia Maria de Carvalho Aguiar, Graziela Bortz, Henrique Ballalai Ferraz
Musician's dystonia is a task-specific dystonia (TSD) worldwide disabling disorder, and most of the affected individuals may have severe difficulty to play their instrument. Many professional music players may have to quit working as a player. The objective of the present study was to evaluate the clinical characteristics and frequency of TSD in Brazilian music players and to promote awareness of this condition among musicians. We visited orchestras and music schools delivering lectures on TSD and about the scope of our survey...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28316590/rehabilitation-using-guided-cerebral-plasticity-of-a-brachial-plexus-injury-treated-with-intercostal-and-phrenic-nerve-transfers
#4
Lars B Dahlin, Gert Andersson, Clas Backman, Hampus Svensson, Anders Björkman
Recovery after surgical reconstruction of a brachial plexus injury using nerve grafting and nerve transfer procedures is a function of peripheral nerve regeneration and cerebral reorganization. A 15-year-old boy, with traumatic avulsion of nerve roots C5-C7 and a non-rupture of C8-T1, was operated 3 weeks after the injury with nerve transfers: (a) terminal part of the accessory nerve to the suprascapular nerve, (b) the second and third intercostal nerves to the axillary nerve, and (c) the fourth to sixth intercostal nerves to the musculocutaneous nerve...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28316589/a-postural-tremor-highly-responsive-to-transcranial-cerebello-cerebral-dcs-in-arca3
#5
Florian Bodranghien, Nordeyn Oulad Ben Taib, Lionel Van Maldergem, Mario Manto
BACKGROUND AND OBJECTIVES: Cerebellar ataxias are disabling disorders that impact the quality of life of patients. In many cases, an effective treatment is missing. Despite the increasing knowledge on the pathogenesis of cerebellar disorders including genetic aspects, there is currently a gap in the therapeutical management of cerebellar deficits. Cerebellar ataxia associated with ANO10 mutation (ARCA3) presents a disabling cerebellar syndrome. The aim of this study is to report a patient with a marked postural tremor responding to transcranial cerebello-cerebral direct current stimulation (tCCDCS)...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28316588/alterations-of-muscle-activation-pattern-in-stroke-survivors-during-obstacle-crossing
#6
Chenming Ma, Na Chen, Yurong Mao, Dongfeng Huang, Rong Song, Le Li
OBJECTIVE: This study investigates changes in the neuromuscular activation pattern of the lower limb muscles in stroke survivors when crossing obstacles of three different heights. METHODS: Eight stroke survivors and eight age-, height-, and gender-matched healthy controls were recruited and instructed to cross over obstacles with heights of 10, 20, and 30% leg length. Surface electromyography (EMG) signals were recorded from the rectus femoris (RF), biceps femoris (BF), tibialis anterior (TA), and medial gastrocnemius (MG) of both limbs...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28316587/characterization-of-the-antinociceptive-mechanisms-of-khat-extract-catha-edulis-in-mice
#7
Elham A Afify, Huda M Alkreathy, Ahmed S Ali, Hassan A Alfaifi, Lateef M Khan
This study investigated the antinociceptive mechanisms of khat extract (100, 200, and 400 mg/kg, i.p.) in four pain models: two thermic (hot plate, tail-flick) and two chemical (acetic acid, formalin) models. Male mice were pretreated intraperitoneally (i.p.) with the opioid receptor blocker naloxone (5 mg/kg), the cholinergic antagonist atropine (2 mg/kg), the selective α1 blocker prazosin (1 mg/kg), the dopamine D2 antagonist haloperidol (1.5 mg/kg), or the GABAA receptor antagonist, bicuculline (1 mg/kg) 15 minutes prior to i...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28316586/spatial-and-temporal-high-processing-of-visual-and-auditory-stimuli-in-cervical-dystonia
#8
Gaetana Chillemi, Alessandro Calamuneri, Francesca Morgante, Carmen Terranova, Vincenzo Rizzo, Paolo Girlanda, Maria Felice Ghilardi, Angelo Quartarone
OBJECTIVE: Investigation of spatial and temporal cognitive processing in idiopathic cervical dystonia (CD) by means of specific tasks based on perception in time and space domains of visual and auditory stimuli. BACKGROUND: Previous psychophysiological studies have investigated temporal and spatial characteristics of neural processing of sensory stimuli (mainly somatosensorial and visual), whereas the definition of such processing at higher cognitive level has not been sufficiently addressed...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28303115/evolution-of-cerebral-ischemia-assessed-by-amide-proton-transfer-weighted-mri
#9
Guodong Song, Chunmei Li, Xiaojie Luo, Xuna Zhao, Shuai Zhang, Yi Zhang, Shanshan Jiang, Xianlong Wang, Yuhui Chen, Haibo Chen, Tao Gong, Jinyuan Zhou, Min Chen
Amide proton transfer-weighted (APTW) magnetic resonance imaging (MRI) has recently become a potentially important tool for evaluating acidosis in ischemic stroke. The purpose of this study was to evaluate the dynamic pH-related changes in the lesions in patients with ischemia. Thirty-nine patients with ischemic stroke (symptom onset to imaging time ranging 2 h-7 days) were examined with a 3.0-T MRI system. Patients were divided into four groups: at the hyperacute stage (onset time ≤ 6 h), at the acute stage (6 h < onset time ≤ 48 h), at the early subacute stage (48 h < onset time ≤ 96 h), and at the late subacute stage (96 h < onset time ≤ 168 h)...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28298899/decision-making-in-multiple-sclerosis-the-role-of-aversion-to-ambiguity-for-therapeutic-inertia-among-neurologists-discutir-ms
#10
Gustavo Saposnik, Angel P Sempere, Daniel Prefasi, Daniel Selchen, Christian C Ruff, Jorge Maurino, Philippe N Tobler
OBJECTIVES: Limited information is available on physician-related factors influencing therapeutic inertia (TI) in multiple sclerosis (MS). Our aim was to evaluate whether physicians' risk preferences are associated with TI in MS care, by applying concepts from behavioral economics. DESIGN: In this cross-sectional study, participants answered questions regarding the management of 20 MS case scenarios, completed 3 surveys, and 4 experimental paradigms based on behavioral economics...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28293215/classification-of-different-degrees-of-disability-following-intracerebral-hemorrhage-a-decision-tree-analysis-from-vista-ich-collaboration
#11
Thanh G Phan, Jian Chen, Richard Beare, Henry Ma, Benjamin Clissold, John Van Ly, Velandai Srikanth
BACKGROUND AND PURPOSE: Prognostication following intracerebral hemorrhage (ICH) has focused on poor outcome at the expense of lumping together mild and moderate disability. We aimed to develop a novel approach at classifying a range of disability following ICH. METHODS: The Virtual International Stroke Trial Archive collaboration database was searched for patients with ICH and known volume of ICH on baseline CT scans. Disability was partitioned into mild [modified Rankin Scale (mRS) at 90 days of 0-2], moderate (mRS = 3-4), and severe disabilities (mRS = 5-6)...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28293214/different-phenotypes-at-onset-in-neuromyelitis-optica-spectrum-disorder-patients-with-aquaporin-4-autoimmunity
#12
Youming Long, Junyan Liang, Linzhan Wu, Shaopeng Lin, Cong Gao, Xiaohui Chen, Wei Qiu, Yu Yang, Xueping Zheng, Ning Yang, Min Gao, Yaotang Chen, Zhanhang Wang, Quanxi Su
BACKGROUND: Although rare, brain abnormalities without optic neuritis (ON) or transverse myelitis (TM) diagnosed with neuromyelitis optica spectrum disorder (NMOSD) have been reported in patients positive for the aquaporin-4 (AQP4) antibody. OBJECTIVE: To analyze demographic and clinical differences among NMOSD patients without ON or TM, those with either ON or TM, and patients with simultaneous ON and TM at disease onset. METHODS: In this retrospective study, patients who were positive for the AQP4 antibody, as detected using a cell-based assay, at the Second Affiliated Hospital of Guangzhou Medical University in China were recruited...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28293213/curved-walking-rehabilitation-with-a-rotating-treadmill-in-patients-with-parkinson-s-disease-a-proof-of-concept
#13
Marco Godi, Marica Giardini, Antonio Nardone, Anna Maria Turcato, Marco Caligari, Fabrizio Pisano, Marco Schieppati
Training subjects to step-in-place eyes open on a rotating platform while maintaining a fixed body orientation in space [podokinetic stimulation (PKS)] produces a posteffect consisting in inadvertent turning around while stepping-in-place eyes closed [podokinetic after-rotation (PKAR)]. Since the rationale for rehabilitation of curved walking in Parkinson's disease is not fully known, we tested the hypothesis that repeated PKS favors the production of curved walking in these patients, who are uneasy with turning, even when straight walking is little affected...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28289401/sleep-disorders-is-the-trigemino-cardiac-reflex-a-missing-link
#14
REVIEW
Tumul Chowdhury, Barkha Bindu, Gyaninder Pal Singh, Bernhard Schaller
Trigeminal innervated areas in face, nasolacrimal, and nasal mucosa can produce a wide array of cardiorespiratory manifestations that include apnea, bradypnea, bradycardia, hypotension, and arrhythmias. This reflex is a well-known entity called "trigemino-cardiac reflex" (TCR). The role of TCR is investigated in various pathophysiological conditions especially in neurosurgical, but also skull base surgery procedures. Additionally, its significance in various sleep-related disorders has also been highlighted recently...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28289400/increased-circulating-exosomal-mirna-223-is-associated-with-acute-ischemic-stroke
#15
Yajing Chen, Yaying Song, Jun Huang, Meijie Qu, Yu Zhang, Jieli Geng, Zhijun Zhang, Jianrong Liu, Guo-Yuan Yang
Recent studies have demonstrated that exosomal microRNAs (miRNAs) are novel biomarkers and therapeutic targets for various diseases including vascular disease. However, specific exosomal miRNAs expression in stroke patients has not been reported yet. Here, we explored whether circulating exosomal miRNAs can serve as potential biomarkers for the diagnosis of acute ischemic stroke and discussed the potential for clinical application. Blood samples were collected from acute ischemic stroke patients within the first 72 h (n = 50)...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28289399/auditory-and-vestibular-evoked-potentials-correlate-with-motor-and-non-motor-features-of-parkinson-s-disease
#16
Ali Soliman Shalash, Dalia Mohamed Hassan, Hanan Hani Elrassas, Mohamed Mosaad Salama, Edna Méndez-Hernández, José M Salas-Pacheco, Oscar Arias-Carrión
Degeneration of several brainstem nuclei has been long related to motor and non-motor symptoms (NMSs) of Parkinson's disease (PD). Nevertheless, due to technical issues, there are only a few studies that correlate that association. Brainstem auditory-evoked potential (BAEP) and vestibular-evoked myogenic potential (VEMP) responses represent a valuable tool for brainstem assessment. Here, we investigated the abnormalities of BAEPs, ocular VEMPs (oVEMPs), and cervical VEMPs (cVEMPs) in patients with PD and its correlation to the motor and NMSs...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28286495/the-application-of-neuroimaging-to-healthy-and-diseased-brains-present-and-future
#17
EDITORIAL
Jan Kassubek
No abstract text is available yet for this article.
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28286494/clinical-practice-evidence-based-recommendations-for-the-treatment-of-cervical-dystonia-with-botulinum-toxin
#18
REVIEW
Maria Fiorella Contarino, Joost Van Den Dool, Yacov Balash, Kailash Bhatia, Nir Giladi, Johannes H Koelman, Annemette Lokkegaard, Maria J Marti, Miranda Postma, Maja Relja, Matej Skorvanek, Johannes D Speelman, Evelien Zoons, Joaquim J Ferreira, Marie Vidailhet, Alberto Albanese, Marina A J Tijssen
Cervical dystonia (CD) is the most frequent form of focal dystonia. Symptoms often result in pain and functional disability. Local injections of botulinum neurotoxin are currently the treatment of choice for CD. Although this treatment has proven effective and is widely applied worldwide, many issues still remain open in the clinical practice. We performed a systematic review of the literature on botulinum toxin treatment for CD based on a question-oriented approach, with the aim to provide practical recommendations for the treating clinicians...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28280483/outer-plexiform-layer-structures-are-not-altered-following-aav-mediated-gene-transfer-in-healthy-rat-retina
#19
Bert C Giers, Daniela Klein, Alexandra Mendes-Madeira, Carolina Isiegas, Birgit Lorenz, Silke Haverkamp, Knut Stieger
Ocular gene therapy approaches have been developed for a variety of different diseases. In particular, clinical gene therapy trials for RPE65 mutations, X-linked retinoschisis, and choroideremia have been conducted at different centers in recent years, showing that adeno-associated virus (AAV)-mediated gene therapy is safe, but limitations exist as to the therapeutic benefit and long-term duration of the treatment. The technique of vector delivery to retinal cells relies on subretinal injection of the vector solution, causing a transient retinal detachment...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28280482/using-biophysical-models-to-understand-the-effect-of-tdcs-on-neurorehabilitation-searching-for-optimal-covariates-to-enhance-poststroke-recovery
#20
Paola Malerba, Sofia Straudi, Felipe Fregni, Maxim Bazhenov, Nino Basaglia
Stroke is a leading cause of worldwide disability, and up to 75% of survivors suffer from some degree of arm paresis. Recently, rehabilitation of stroke patients has focused on recovering motor skills by taking advantage of use-dependent neuroplasticity, where high-repetition of goal-oriented movement is at times combined with non-invasive brain stimulation, such as transcranial direct current stimulation (tDCS). Merging the two approaches is thought to provide outlasting clinical gains, by enhancing synaptic plasticity and motor relearning in the motor cortex primary area...
2017: Frontiers in Neurology
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