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Spinal stimulation

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https://www.readbyqxmd.com/read/28435858/flexible-and-stretchable-nanowire-coated-fibers-for-optoelectronic-probing-of-spinal-cord-circuits
#1
Chi Lu, Seongjun Park, Thomas J Richner, Alexander Derry, Imogen Brown, Chong Hou, Siyuan Rao, Jeewoo Kang, Chet T Mortiz, Yoel Fink, Polina Anikeeva
Studies of neural pathways that contribute to loss and recovery of function following paralyzing spinal cord injury require devices for modulating and recording electrophysiological activity in specific neurons. These devices must be sufficiently flexible to match the low elastic modulus of neural tissue and to withstand repeated strains experienced by the spinal cord during normal movement. We report flexible, stretchable probes consisting of thermally drawn polymer fibers coated with micrometer-thick conductive meshes of silver nanowires...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28435743/effects-of-overground-locomotor-training-on-the-ventilatory-response-to-volitional-treadmill-walking-in-individuals-with-incomplete-spinal-cord-injury-a-pilot-study
#2
Gino S Panza, Andrew A Guccione, Lisa M Chin, Jared M Gollie, Jeffery E Herrick, John P Collins
INTRODUCTION: Although there has been substantial emphasis on the neuromuscular and cardiovascular adaptations following rehabilitation, pulmonary adaptations in individuals with incomplete SCI (iSCI) in response to locomotor training have been less frequently studied. In healthy individuals, effective transition from rest to work is accomplished by a hyperpneic response, which exhibits an exponential curve with three phases. However, the degree to which our current understanding of exercise hyperpnea can be applied to individuals with iSCI is unknown...
2017: Spinal Cord Series and Cases
https://www.readbyqxmd.com/read/28434993/effect-of-rat-spinal-cord-injury-hemisection-on-the-ex-vivo-uptake-and-release-of-3-h-noradrenaline-from-a-slice-preparation
#3
Zoltán Borbély, Benedek Krisztián Csomó, Ágnes Kittel, Gábor Gerber, Gábor Varga, E Sylvester Vizi
We measured the ex vivo uptake and release of [(3)H]noradrenaline ([(3)H]NA) from perfused rat spinal cord slice preparations at 1, 3 and 14 days after unilateral hemisection-induced spinal cord injury (SCI) compared with control slice preparations. After surgical hemisection under anaesthesia, the rats showed characteristic signs of hemiplegia, with no movement of the ipsilateral hindlimb. After 3 days, the electron microscopy images showed overall degeneration of neuronal organelles and the myelin sheath, but the synapses seemed to be intact...
April 20, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28433438/analgesic-effects-of-transcutaneous-ultrasound-nerve-stimulation-in-a-rat-model-of-oxaliplatin-induced-mechanical-hyperalgesia-and-cold-allodynia
#4
Yueh-Ling Hsieh, Han-Yu Chen, Ching-Hsiang Yang, Chen-Chia Yang
This study investigated the effects and underlying mechanisms of therapeutic ultrasound (TUS) in a rat model of oxaliplatin-induced peripheral neuropathy. Animals received a total of eight injections with oxaliplatin (4 mg/kg), administered at 3-d intervals. TUS intervention (1 MHz, 0.5 W/cm(2)) started on the fifth oxaliplatin administration and continued for 10 consecutive d. Sensory behavioral examinations, protein levels of transient receptor potential channels (TRPM8 and TRPV1) in dorsal root ganglia (DRG) and substance P (SP) in spinal dorsal horn were examined...
April 19, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28428749/deep-brain-stimulation-improves-the-symptoms-and-sensory-signs-of-persistent-central-neuropathic-pain-from-spinal-cord-injury-a-case-report
#5
Walter J Jermakowicz, Ian D Hentall, Jonathan R Jagid, Corneliu C Luca, James Adcock, Alberto Martinez-Arizala, Eva Widerström-Noga
Central neuropathic pain (CNP) is a significant problem after spinal cord injury (SCI). Pharmacological and non-pharmacological approaches may reduce the severity, but relief is rarely substantial. While deep brain stimulation (DBS) has been used to treat various chronic pain types, the technique has rarely been used to attenuate CNP after SCI. Here we present the case of a 54-year-old female with incomplete paraplegia who had severe CNP in the lower limbs and buttock areas since her injury 30 years prior. She was treated with bilateral DBS of the midbrain periaqueductal gray (PAG)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28427472/optimising-conservative-management-of-chronic-low-back-pain-study-protocol-for-a-randomised-controlled-trial
#6
Katherine J Simson, Clint T Miller, Jon Ford, Andrew Hahne, Luana Main, Timo Rantalainen, Wei-Peng Teo, Megan Teychenne, David Connell, Guy Trudel, Guoyan Zheng, Gary Thickbroom, Daniel L Belavy
BACKGROUND: Lower back pain is a global health issue affecting approximately 80% of people at some stage in their life. The current literature suggests that any exercise is beneficial for reducing back pain. However, as pain is a subjective evaluation and physical deficits are evident in low back pain, using it as the sole outcome measure to evaluate superiority of an exercise protocol for low back pain treatment is insufficient. The overarching goal of the current clinical trial is to implement two common, conservative intervention approaches and examine their impact on deficits in chronic low back pain...
April 20, 2017: Trials
https://www.readbyqxmd.com/read/28425137/three-dimensional-printing-an-aid-to-epidural-access-for-neuromodulation
#7
Murray G Taverner, John P Monagle
OBJECTIVE: The case report details to use of three-dimensional (3D) printing as an aid to neuromodulation. METHODS: A patient is described in whom previous attempts at spinal neuromodulation had failed due to lack of epidural or intrathecal access, and the use of a 3D printed model allowed for improved planning and ultimately, success. RESULTS: Successful spinal cord stimulation was achieved with the plan developed by access to a 3D model of the patient's spine...
April 20, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28424655/sustained-and-transient-vestibular-systems-a-physiological-basis-for-interpreting-vestibular-function
#8
REVIEW
Ian S Curthoys, Hamish G MacDougall, Pierre-Paul Vidal, Catherine de Waele
Otolithic afferents with regular resting discharge respond to gravity or low-frequency linear accelerations, and we term these the static or sustained otolithic system. However, in the otolithic sense organs, there is anatomical differentiation across the maculae and corresponding physiological differentiation. A specialized band of receptors called the striola consists of mainly type I receptors whose hair bundles are weakly tethered to the overlying otolithic membrane. The afferent neurons, which form calyx synapses on type I striolar receptors, have irregular resting discharge and have low thresholds to high frequency (e...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28422795/trial-design-and-endpoint-evaluation-in-clinical-studies-addressing-chronic-back-pain
#9
Peter Staats
STUDY DESIGN: A review of the literature evaluating clinical trials of chronic back pain. OBJECTIVE: To assist physicians in assessing the quality of clinical trial data to make the most informed treatment decisions. SUMMARY OF BACKGROUND DATA: Chronic pain is a tremendous public health issue, affecting close to 100 million adults in the United States, and costs the American people billions of dollars. One traditional treatment approach, the long-term use of opiate medications, has recently come under intense scrutiny for problems with complications, diversion, abuse, addiction and lack of efficacy...
April 18, 2017: Spine
https://www.readbyqxmd.com/read/28422399/dorsal-root-ganglion-stimulation-for-complex-regional-pain-syndrome-crps-recurrence-after-amputation-for-crps-and-failure-of-conventional-spinal-cord-stimulation
#10
Andreas Goebel, Sarah Lewis, Rhodri Phillip, Manohar Sharma
Limb amputation is sometimes being performed in long-standing complex regional pain syndrome (CRPS), although little evidence is available guiding management decisions, including how CRPS recurrence should be managed. This report details the management of a young soldier with CRPS recurrence 2 years after midtibial amputation for CRPS. Conventional spinal cord stimulation did not achieve paraesthetic coverage, or pain relief in the stump, whereas L4 dorsal root ganglion stimulation achieved both coverage and initially modest pain relief, and over time, substantial pain relief...
April 18, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/28422349/effects-of-extrinsic-cardiac-nerve-stimulation-on-atrial-fibrillation-inducibility-the-regulatory-role-of-the-spinal-cord
#11
Zixuan Dai, Congxin Huang, Qingyan Zhao, Shujuan Zhang, Hongyi Zhao, Youjing Zhang, Yongsheng Qian, Yanhong Tang
OBJECTIVE: To investigate the effect of the mutual regulation of the extrinsic cardiac nerves on atrial electrophysiology and atrial fibrillation (AF) vulnerability. METHODS AND RESULTS: Fourteen dogs were randomly divided into 2 groups: spinal cord stimulation (SCS) group (n = 7) and spinal cord block (SCB) group (n = 7). SCS was performed with 90% of the threshold voltage stimulating the T1 -T2 spinal level, while SCB was performed by injecting 2% lidocaine into the epidural space at the T2-3 level...
April 19, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28421392/combination-of-sacral-nerve-and-tibial-nerve-stimulation-for-treatment-of-bladder-overactivity-in-pigs
#12
Xing Li, Limin Liao, Guoqing Chen, Zhaoxia Wang, Han Deng
PURPOSE: Sacral nerve and tibial nerve stimulation have been singly used to treat overactive bladder (OAB). This study evaluated the effects of both combined stimulation on treating bladder overactivity in pigs and explored a novel treatment modality for OAB. METHODS: An implant-driven stimulator of the S3 spinal nerve was implanted in 5 pigs. The contralateral tibial nerve was stimulated by an external stimulator. Multiple cystometrograms were performed to determine the effects of single nerve stimulation and combination sacral nerve stimulation (SNS) and tibial nerve stimulation (TNS) on the micturition reflex by infusing normal saline (NS) or acetic acid (AA)...
April 18, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28419784/four-extremity-neurostimulation-using-two-cervical-octapolar-leads-and-high-frequency-of-10-khz
#13
Shervin Harandi, Leonardo Kapural
OBJECTIVES AND METHODS: A few published reports describe successful clinical use of low-frequency spinal cord stimulation (SCS) in the cervical spine resulting in bilateral upper and lower extremity pain relief. Major side-effect when using this modality of SCS is the uneven intensity of paresthesias which are frequently excessive in upper extremities while attempting to achieve optimal paresthesia coverage in all four extremities. RESULTS AND CONCLUSIONS: Here we describe a successful case of high frequency SCS at 10 kHz where profound control of neuropathic pain of all four extremities was achieved without the complication of paresthesias...
April 18, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/28419410/selective-and-state-dependent-activation-of-tresk-background-potassium-channel-by-cloxyquin
#14
Miklós Lengyel, Alice Dobolyi, Gábor Czirják, Péter Enyedi
BACKGROUND AND PURPOSE: Cloxyquin (5-cloroquinolin-8-ol) has been previously described as an activator of TRESK (K2P 18.1, TWIK-related spinal cord K(+) channel) background potassium channel. We have examined the specificity of the drug by testing several K2P channels. We have investigated the mechanism of cloxyquin-mediated TRESK activation, focusing on the differences between the physiologically relevant regulatory states of the channel. EXPERIMENTAL APPROACH: Potassium currents were measured by two-electrode voltage clamp in Xenopus oocytes and by whole-cell patch clamp in mouse dorsal root ganglion (DRG) neurons...
April 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28411487/the-relationship-of-corticospinal-excitability-with-pain-motor-performance-and-disability-in-subjects-with-chronic-wrist-hand-pain
#15
René Pelletier, Johanne Higgins, Daniel Bourbonnais
There is a growing body of evidence of changes in corticospinal excitability associated with musculoskeletal disorders, however there is a lack of knowledge of how these changes relate to measures of pain, motor performance and disability. An exploratory study was performed utilizing Transcranial Magnetic Stimulation to investigate differences in corticospinal excitability in the Abductor Pollicis Brevis (APB) between 15 pain-free subjects and 15 subjects with chronic wrist/hand pain and to determine how corticospinal excitability was associated with measures of pain (visual analog scale, AUSCAN™), hand motor performance (isometric and key pinch strength, Purdue Pegboard Test), disability (AUSCAN™), and spinal motoneuronal excitability...
April 7, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28411102/zl006-protects-spinal-cord-neurons-against-ischemia-induced-oxidative-stress-through-ampk-pgc-1%C3%AE-sirt3-pathway
#16
Shu-Guang Liu, Yun-Mei Wang, Yan-Jun Zhang, Xi-Jing He, Tao Ma, Wei Song, Yu-Min Zhang
Spinal cord ischemia (SCI) induces a range of cellular and molecular cascades, including activation of glutamate receptors and downstream signaling. Post-synaptic density protein 95 (PSD-95) links neuronal nitric oxide synthase (nNOS) with the N-methyl-d-aspartic acid (NMDA) receptors to form a ternary complex in the CNS. This molecular complex-mediated cytotoxicity has been implicated in brain ischemia, but its role in SCI has not been determined. The goal of the study was to investigate the potential protective effects of ZL006, a small-molecule inhibitor of the PSD-95/nNOS interaction, in an in vitro SCI model induced by oxygen and glucose deprivation (OGD) in cultured spinal cord neurons...
April 12, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28409395/spinal-and-corticospinal-pathways-are-differently-modulated-when-standing-at-the-bottom-and-the-top-of-a-three-step-staircase-in-young-and-older-adults
#17
Johanna Johannsson, Jacques Duchateau, Stéphane Baudry
PURPOSE: This study investigated the modulation of spinal (group Ia afferents) and corticospinal pathways when young (22.7 ± 1.3 years) and older adults (72.2 ± 7.9 years) stood at the bottom and at the top of a three-step staircase equipped with force platforms. METHOD: Changes in submaximal H-reflex amplitude (H 50) and slope of the H-reflex input-output relation (spinal pathway), and in amplitude of motor-evoked potentials (MEP) triggered by transcranial magnetic stimulation (corticospinal pathway) at two intensities (1...
April 13, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28405624/gm-csf-is-not-essential-for-experimental-autoimmune-encephalomyelitis-but-promotes-brain-targeted-disease
#18
Emily R Pierson, Joan M Goverman
Experimental autoimmune encephalomyelitis (EAE) has been used as an animal model of multiple sclerosis to identify pathogenic cytokines that could be therapeutic targets. Granulocyte-macrophage colony-stimulating factor (GM-CSF) is the only cytokine reported to be essential for EAE. We investigated the role of GM-CSF in EAE in C3HeB/FeJ mice that uniquely exhibit extensive brain and spinal cord inflammation. Unexpectedly, GM-CSF-deficient C3HeB/FeJ mice were fully susceptible to EAE because IL-17 activity compensated for the loss of GM-CSF during induction of spinal cord-targeted disease...
April 6, 2017: JCI Insight
https://www.readbyqxmd.com/read/28405184/optical-imaging-of-the-motor-cortex-following-antidromic-activation-of-the-corticospinal-tract-after-spinal-cord-injury
#19
Kyung H Lee, Un J Kim, Se W Park, Yong G Park, Bae H Lee
Spinal cord injury (SCI) disrupts neuronal networks of ascending and descending tracts at the site of injury, leading to a loss of motor function. Restoration and new circuit formation are important components of the recovery process, which involves collateral sprouting of injured and uninjured fibers. The present study was conducted to determine cortical responses to antidromic stimulation of the corticospinal tracts, to compare changes in the reorganization of neural pathways within normal and spinal cord-injured rats, and to elucidate differences in spatiotemporal activity patterns of the natural progression and reorganization of neural pathways in normal and SCI animals using optical imaging...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28405011/plasticity-within-excitatory-and-inhibitory-pathways-of-the-vestibulo-spinal-circuitry-guides-changes-in-motor-performance
#20
Diana E Mitchell, Charles C Della Santina, Kathleen E Cullen
Investigations of behaviors with well-characterized circuitry are required to understand how the brain learns new motor skills and ensures existing behaviors remain appropriately calibrated over time. Accordingly, here we recorded from neurons within different sites of the vestibulo-spinal circuitry of behaving macaque monkeys during temporally precise activation of vestibular afferents. Behaviorally relevant patterns of vestibular nerve activation generated a rapid and substantial decrease in the monosynaptic responses recorded at the first central stage of processing from neurons receiving direct input from vestibular afferents within minutes, as well as a decrease in the compensatory reflex response that lasted up to 8 hours...
April 12, 2017: Scientific Reports
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