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https://www.readbyqxmd.com/read/29468441/a-new-minimally-invasive-technique-for-lead-revision-of-perc-paddle-leads
#1
Olivier De Coster, Patrice Forget, Maarten Moens, Milica Matic, Lucie Choustoulakis, Jan Poelaert
To report on a less-invasive technique for replacing a broken lead in a spinal cord stimulation (SCS) device that makes use of St. Jude Medical's "Epiducer" device. A 53-year-old woman suffered a loss of stimulation on her internal pulse generator (IPG), which was found to have a broken lead. The broken lead was withdrawn using the Epiducer device with minimal invasiveness and without pain. A new lead was put in place, and successful stimulation using the IPG resumed. Follow-up 3 weeks later showed a well-functioning SCS system...
February 21, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29468190/optogenetic-activation-of-non-nociceptive-a%C3%AE-fibers-induces-neuropathic-pain-like-sensory-and-emotional-behaviors-after-nerve-injury-in-rats
#2
Ryoichi Tashima, Keisuke Koga, Misuzu Sekine, Kensho Kanehisa, Yuta Kohro, Keiko Tominaga, Katsuyuki Matsushita, Hidetoshi Tozaki-Saitoh, Yugo Fukazawa, Kazuhide Inoue, Hiromu Yawo, Hidemasa Furue, Makoto Tsuda
Neuropathic pain is caused by peripheral nerve injury (PNI). One hallmark symptom is allodynia (pain caused by normally innocuous stimuli), but its mechanistic underpinning remains elusive. Notably, whether selective stimulation of non-nociceptive primary afferent Aβ fibers indeed evokes neuropathic pain-like sensory and emotional behaviors after PNI is unknown, because of the lack of tools to manipulate Aβ fiber function in awake, freely moving animals. In this study, we used a transgenic rat line that enables stimulation of non-nociceptive Aβ fibers by a light-activated channel (channelrhodopsin-2; ChR2)...
January 2018: ENeuro
https://www.readbyqxmd.com/read/29467001/neuregulin-1-elicits-a-regulatory-immune-response-following-traumatic-spinal-cord-injury
#3
Arsalan Alizadeh, Kallivalappil T Santhosh, Hardeep Kataria, Abdelilah S Gounni, Soheila Karimi-Abdolrezaee
BACKGROUND: Spinal cord injury (SCI) triggers a robust neuroinflammatory response that governs secondary injury mechanisms with both degenerative and pro-regenerative effects. Identifying new immunomodulatory therapies to promote the supportive aspect of immune response is critically needed for the treatment of SCI. We previously demonstrated that SCI results in acute and permanent depletion of the neuronally derived Neuregulin-1 (Nrg-1) in the spinal cord. Increasing the dysregulated level of Nrg-1 through acute intrathecal Nrg-1 treatment enhanced endogenous cell replacement and promoted white matter preservation and functional recovery in rat SCI...
February 21, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29466494/granulocyte-colony-stimulating-factor-combined-with-methylprednisolone-improves-functional-outcomes-in-rats-with-experimental-acute-spinal-cord-injury
#4
William Gemio Jacobsen Teixeira, Alexandre Fogaça Cristante, Raphael Martus Marcon, Gustavo Bispo, Ricardo Ferreira, Tarcísio Eloy Pessoa de Barros-Filho
OBJECTIVES: To evaluate the effects of combined treatment with granulocyte colony-stimulating factor (G-CSF) and methylprednisolone in rats subjected to experimental spinal cord injury. METHODS: Forty Wistar rats received a moderate spinal cord injury and were divided into four groups: control (no treatment); G-CSF (G-CSF at the time of injury and daily over the next five days); methylprednisolone (methylprednisolone for 24 h); and G-CSF/Methylprednisolone (methylprednisolone for 24 h and G-CSF at the time of injury and daily over the next five days)...
February 19, 2018: Clinics
https://www.readbyqxmd.com/read/29462706/biomaterials-cues-to-direct-a-pro-regenerative-phenotype-in-macrophages-and-schwann-cells
#5
Melissa R Wrobel, Harini G Sundararaghavan
Following peripheral nerve injury (PNI), inflammatory cues impede repair. We have previously demonstrated that spinal cord matrix (SCM) proteins and hyaluronic acid (HA) nanofibers mitigate chondroitin sulfate proteoglycan (CSPG) inhibition and promote growth in peripheral neurons. In this study, we evaluated the effects of a characteristic CSPG, Chondroitin sulfate A (CSA), SCM, and HA fibers on macrophages and Schwann Cells (SCs). We hypothesized that our cues would accelerate the macrophages return to rest following classical activation (M1/pro-inflammatory) with lipopolysaccharide (LPS; 1μg/mL) and would accelerate the transformation of SCs from an immature state following injury to a mature/pro-myelinating phenotype...
February 17, 2018: Neuroscience
https://www.readbyqxmd.com/read/29462450/false-positive-and-false-negative-results-of-motor-evoked-potential-monitoring-during-surgery-for-intramedullary-spinal-cord-tumors
#6
Ryu Kurokawa, Phyo Kim, Kazushige Itoki, Shinji Yamamoto, Tetsuro Shingo, Toshiki Kawamoto, Shunsuke Kawamoto
BACKGROUND: Motor evoked potential (MEP) recording is used as a method to monitor integrity of the motor system during surgery for intramedullary tumors (IMTs). Reliable sensitivity of the monitoring in predicting functional deterioration has been reported. However, we observed false positives and false negatives in our experience of 250 surgeries of IMTs. OBJECTIVE: To delineate specificity and sensitivity of MEP monitoring and to elucidate its limitations and usefulness...
March 1, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29462368/dural-cells-release-factors-which-promote-cancer-cell-malignancy-and-induce-immunosuppressive-markers-in-bone-marrow-myeloid-cells
#7
Nicholas J Szerlip, Alexandra Calinescu, Eleanor Smith, Rebecca Tagett, Katrina L Clines, Henry H Moon, Russell S Taichman, Catherine H Van Poznak, Gregory A Clines
BACKGROUND: Thirty per cent of cancer patients develop spine metastases with a substantial number leading to spinal cord compression and neurological deficits. Many demonstrate a propensity toward metastasis to the posterior third of the vertebral body. The dura, the outer layer of the meninges, lies in intimate contact with the posterior border of the vertebral body and has been shown to influence adjacent bone. The effects of the dura on bone marrow and cancer cells have not been examined...
February 15, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29460899/-the-diagnostic-significance-of-vestibular-evoked-myogenic-potentials-in-different-types-of-vertigo
#8
A S Kudryavtseva, A V Amelin
AIM: To study the parameters of vestibular evoked myogenic potentials (VEMPs) in different types of vertigo. MATERIAL AND METHODS: Seventy-seven patients, 35 men and 42 women, aged 43.7±12.5 years, with vestibular vertigo and unsteadiness were examined. The activity of the stemocleidomastoid muscle in response to auditory stimulation of the ipsilateral ear was recorded using surface electromyography. RESULTS: There were a trend towards the increase in the N2 latency, the significant reduction of the P1-N2 amplitude (p<0,005) on both sides and significant changes in the coefficient of asymmetry...
2018: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/29460009/the-global-spine-care-initiative-applying-evidence-based-guidelines-on-the-non-invasive-management-of-back-and-neck-pain-to-low-and-middle-income-communities
#9
REVIEW
Roger Chou, Pierre Côté, Kristi Randhawa, Paola Torres, Hainan Yu, Margareta Nordin, Eric L Hurwitz, Scott Haldeman, Christine Cedraschi
PURPOSE: The purpose of this review was to develop recommendations for the management of spinal disorders in low-income communities, with a focus on non-invasive pharmacological and non-pharmacological therapies for non-specific low back and neck pain. METHODS: We synthesized two evidence-based clinical practice guidelines for the management of low back and neck pain. Our recommendations considered benefits, harms, quality of evidence, and costs, with attention to feasibility in medically underserved areas and low- and middle-income countries...
February 19, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29459943/association-of-epidural-stimulation-with-cardiovascular-function-in-an-individual-with-spinal-cord-injury
#10
Christopher R West, Aaron A Phillips, Jordan W Squair, Alexandra M Williams, Matthias Walter, Tania Lam, Andrei V Krassioukov
No abstract text is available yet for this article.
February 19, 2018: JAMA Neurology
https://www.readbyqxmd.com/read/29454118/the-factors-affecting-the-difficulty-of-percutaneous-cylindrical-electrode-placement-for-spinal-cord-stimulation
#11
Kyohei Kin, Takashi Agari, Takao Yasuhara, Yousuke Tomita, Ken Kuwahara, Ittetsu Kin, Michiari Umakoshi, Jun Morimoto, Mihoko Okazaki, Tatsuya Sasaki, Isao Date
OBJECTIVE: Optimal placement of electrodes is important for spinal cord stimulation. Unfortunately, factors affecting the difficulty of percutaneous electrode placement are not well known. In this study, we retrospectively evaluated the factors affecting the difficulty of percutaneous electrode placement. METHODS: The authors performed a retrospective analysis of 90 consecutive procedures of percutaneous cylindrical electrodes implantation at the first author's institution...
February 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29453976/cell-type-specific-expression-of-constitutively-active-rheb-promotes-regeneration-of-bulbospinal-respiratory-axons-following-cervical-sci
#12
Mark W Urban, Biswarup Ghosh, Laura R Strojny, Cole G Block, Sara M Blazejewski, Megan C Wright, George M Smith, Angelo C Lepore
Damage to respiratory neural circuitry and consequent loss of diaphragm function is a major cause of morbidity and mortality in individuals suffering from traumatic cervical spinal cord injury (SCI). Repair of CNS axons after SCI remains a therapeutic challenge, despite current efforts. SCI disrupts inspiratory signals originating in the rostral ventral respiratory group (rVRG) of the medulla from their phrenic motor neuron (PhMN) targets, resulting in loss of diaphragm function. Using a rat model of cervical hemisection SCI, we aimed to restore rVRG-PhMN-diaphragm circuitry by stimulating regeneration of injured rVRG axons via targeted induction of Rheb (ras homolog enriched in brain), a signaling molecule that regulates neuronal-intrinsic axon growth potential...
February 14, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29453346/anti-inflammatory-effect-of-tauroursodeoxycholic-acid-in-raw-264-7-macrophages-bone-marrow-derived-macrophages-bv2-microglial-cells-and-spinal-cord-injury
#13
Seong Jun Kim, Wan-Kyu Ko, Min-Jae Jo, Yoshie Arai, Hyemin Choi, Hemant Kumar, In-Bo Han, Seil Sohn
This study aimed to investigate the anti-inflammatory effects of tauroursodeoxycholic acid (TUDCA) after spinal cord injury (SCI) in rats. We induced an inflammatory process in RAW 264.7 macrophages, BV2 microglial cells, and bone marrow-derived macrophages (BMM) using lipopolysaccharide (LPS). The anti-inflammatory effects of TUDCA on LPS-stimulated RAW 264.7 macrophages, BV2 microglial cells, and BMMs were analyzed using nitric oxide (NO) assays, quantitative real-time polymerase chain reactions (qRT-PCR), and enzyme-linked immunosorbent assays (ELISA)...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29451889/effects-of-patterned-peripheral-nerve-stimulation-on-soleus-spinal-motor-neuron-excitability
#14
Samuel Jimenez, Laura Mordillo-Mateos, Michele Dileone, Michela Campolo, Carmen Carrasco-Lopez, Fabricia Moitinho-Ferreira, Tomas Gallego-Izquierdo, Hartwig R Siebner, Josep Valls-Solé, Juan Aguilar, Antonio Oliviero
Spinal plasticity is thought to contribute to sensorimotor recovery of limb function in several neurological disorders and can be experimentally induced in animals and humans using different stimulation protocols. In healthy individuals, electrical continuous Theta Burst Stimulation (TBS) of the median nerve has been shown to change spinal motoneuron excitability in the cervical spinal cord as indexed by a change in mean H-reflex amplitude in the flexor carpi radialis muscle. It is unknown whether continuous TBS of a peripheral nerve can also shift motoneuron excitability in the lower limb...
2018: PloS One
https://www.readbyqxmd.com/read/29451438/reinnervation-of-the-rectum-with-transfer-of-the-genital-branch-of-the-genitofemoral-nerve-to-the-pelvic-nerve-in-rats
#15
Chuanjiang Dong, Ping Zhu, Zonglan Xie, Zheqi Fan, Ziqiang Dong
OBJECTIVE The purpose of this study was to determine the feasibility of rectum reinnervation with transfer of a primarily genitofemoral nerve to the pelvic nerve in the rat. METHODS Thirty-six male rats were randomly divided into 3 groups: rats in the nerve transfer group (n = 12) were subjected to rectal denervation and then bilateral genitofemoral nerve-pelvic nerve transfer; rats in the nerve resection group (n = 12) underwent rectum denervation without nerve transfer; and rats in the control group (n = 12) underwent sham surgery...
February 16, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29451306/supraspinal-modulation-of-neuronal-synchronization-by-nociceptive-stimulation-induces-an-enduring-reorganization-of-dorsal-horn-neuronal-connectivity
#16
E Contreras-Hernández, D Chávez, E Hernández, E Velázquez, P Reyes, J Bejar, M Martín, U Cortés, S Glusman, P Rudomin
Despite the profuse information on the molecular and cellular mechanisms involved in the central sensitization produced by intense nociceptive stimulation, the changes in the patterns of functional connectivity between spinal neurones associated with the development of secondary hyperalgesia and allodynia remain largely unknown. Here we show that the state of central sensitization produced by the intradermal injection of capsaicin is associated with structured transformations in neuronal synchronization that lead to an enduring reorganization of the functional connectivity within a segmentally distributed ensemble of dorsal horn neurones...
February 16, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29447105/multi-muscle-electrical-stimulation-and-stand-training-effects-on-standing
#17
Kamyar Momeni, Arvind Ramanujam, Erica L Garbarini, Gail F Forrest
OBJECTIVE: To examine the biomechanical and neuromuscular effects of a longitudinal multi-muscle electrical stimulation (submaximal intensities) training of the lower limbs combined with/without activity-based stand training, on the recovery of stability and function for one individual with spinal cord injury (SCI). DESIGN: Single-subject, longitudinal study. SETTING: Neuroplasticity laboratory. PARTICIPANT: A 34-year-old male, with sensory- and motor-complete SCI (C5/C6)...
February 15, 2018: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29447083/in-complete-sci-patients-long-term-functional-electrical-stimulation-of-permanent-denervated-muscles-increases-epidermis-thickness
#18
Giovanna Albertin, Christian Hofer, Sandra Zampieri, Michael Vogelauer, Stefan Löfler, Barbara Ravara, Diego Guidolin, Caterina Fede, Damiana Incendi, Andrea Porzionato, Raffaele De Caro, Alfonc Baba, Andrea Marcante, Francesco Piccione, Paolo Gargiulo, Amber Pond, Ugo Carraro, Helmut Kern
Our studies have shown that atrophic Quadriceps muscles from spinal cord injury patients suffering with permanent denervation-induced atrophy and degeneration of muscle fibers, were almost completely rescued to normal size after two years of home-based functional electrical stimulation (h-bFES). Because we used surface electrodes to stimulate the muscle, we wanted to know how the skin was affected by the treatments. Here, we report preliminary data from histological morphometry of Hematoxylin-Eosin-stained paraffin-embedded skin sections harvested from the legs of three SCI patients before and after two years of h-bFES...
February 15, 2018: Neurological Research
https://www.readbyqxmd.com/read/29443550/erythropoietin-a-putative-neurotransmitter-during-hypoxia-is-produced-in-rvlm-neurons-and-activates-them-in-neonatal-wistar-rats
#19
Naoki Oshima, Hiroshi Onimaru, Akira Yamagata, Seigo Itoh, Hidehito Matsubara, Toshihiko Imakiire, Yasuhiro Nishida, Hiroo Kumagai
Recent studies indicate that erythropoietin (EPO) is present in many areas of the brain and is active in the restoration of impaired neurons. In this study, we examined the presence of EPO and its role in bulbospinal neurons in the rostral ventrolateral medulla (RVLM). Hypoxia is often accompanied by a high blood pressure (BP). We hypothesized that EPO is produced in response to hypoxia in RVLM neurons and then activates them. To investigate whether RVLM neurons are sensitive to EPO, we examined the changes in the membrane potentials (MPs) of bulbospinal RVLM neurons using the whole-cell patch-clamp technique during superfusion with EPO...
February 14, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29443103/paradigms-of-lower-extremity-electrical-stimulation-training-after-spinal-cord-injury
#20
Ashraf S Gorgey, Refka E Khalil, Robert M Lester, Gary A Dudley, David R Gater
Skeletal muscle atrophy, increased adiposity and reduced physical activity are key changes observed after spinal cord injury (SCI) and are associated with numerous cardiometabolic health consequences. These changes are likely to increase the risk of developing chronic secondary conditions and impact the quality of life in persons with SCI. Surface neuromuscular electrical stimulation evoked resistance training (NMES-RT) was developed as a strategy to attenuate the process of skeletal muscle atrophy, decrease ectopic adiposity, improve insulin sensitivity and enhance mitochondrial capacity...
February 1, 2018: Journal of Visualized Experiments: JoVE
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