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Chronic regional pain

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https://www.readbyqxmd.com/read/28549561/lateral-thalamic-control-of-nociceptive-response-after-whisker-pad-injection-of-varicella-zoster-virus
#1
Phillip Kramer, Crystal Stinson, Mikhail Umorin, Mohong Deng, Mahesh Rao, Larry Bellinger, Michael B Yee, Paul R Kinchington
Pain is a common complication of herpes zoster (HZ) infection which results from reactivation of a latent varicella zoster virus (VZV). A third of HZ patients' progress to a chronic pain state known as post herpetic neuralgia (PHN), and about a quarter of these patients' have orofacial pain. The mechanisms controlling the pain responses are not understood. Studies suggest central pathways involving the thalamus could control pain related to HZ, and studies in our lab suggest vesicular GABA transporter (VGAT) in the lateral thalamus influences orofacial pain...
May 23, 2017: Neuroscience
https://www.readbyqxmd.com/read/28542541/varicella-zoster-virus-glycoprotein-c-increases-chemokine-mediated-leukocyte-migration
#2
Víctor González-Motos, Carina Jürgens, Birgit Ritter, Kai A Kropp, Verónica Durán, Olav Larsen, Anne Binz, Werner J D Ouwendijk, Tihana Lenac Rovis, Stipan Jonjic, Georges M G M Verjans, Beate Sodeik, Thomas Krey, Rudolf Bauerfeind, Thomas F Schulz, Benedikt B Kaufer, Ulrich Kalinke, Amanda E I Proudfoot, Mette M Rosenkilde, Abel Viejo-Borbolla
Varicella zoster virus (VZV) is a highly prevalent human pathogen that establishes latency in neurons of the peripheral nervous system. Primary infection causes varicella whereas reactivation results in zoster, which is often followed by chronic pain in adults. Following infection of epithelial cells in the respiratory tract, VZV spreads within the host by hijacking leukocytes, including T cells, in the tonsils and other regional lymph nodes, and modifying their activity. In spite of its importance in pathogenesis, the mechanism of dissemination remains poorly understood...
May 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28541431/emerging-safety-of-intramedullary-transplantation-of-human-neural-stem-cells-in-chronic-cervical-and-thoracic-spinal-cord-injury
#3
Allan D Levi, David O Okonkwo, Paul Park, Arthur L Jenkins, Shekar N Kurpad, Ann M Parr, Aruna Ganju, Bizhan Aarabi, Dong Kim, Steven Casha, Michael G Fehlings, James S Harrop, Kim D Anderson, Allyson Gage, Jane Hsieh, Stephen Huhn, Armin Curt, Raphael Guzman
BACKGROUND: Human central nervous system stem cells (HuCNS-SC) are multipotent adult stem cells with successful engraftment, migration, and region-appropriate differentiation after spinal cord injury (SCI). OBJECTIVE: To present data on the surgical safety profile and feasibility of multiple intramedullary perilesional injections of HuCNS-SC after SCI. METHODS: Intramedullary free-hand (manual) transplantation of HuCNS-SC cells was performed in subjects with thoracic (n = 12) and cervical (n = 17) complete and sensory incomplete chronic traumatic SCI...
May 24, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28540568/-tibial-pilon-fractures-advoidance-and-therapy-of-complications
#4
REVIEW
Ralph Gaulke, Christian Krettek
Because of the complex fracture morphology and vulnerable soft tissue coverage, fractures of the tibial pilon are difficult to treat. Complications are more common than in bi- or trimalleolar fractures. The surgeon has to know about the special risks of these injuries to avoid complications. Early complications are soft tissue necrosis, persisting fragment dislocations after surgery, loss of reposition and deep wound infection. The surgeon has to be aware of early signs of compartment-syndrome and chronic regional pain syndrome (CRPS)...
May 24, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28540180/hemoglobin-and-mean-platelet-volume-predicts-diffuse-t1-mri-white-matter-volume-decrease-in-sickle-cell-disease-patients
#5
Soyoung Choi, Adam M Bush, Matthew T Borzage, Anand A Joshi, William J Mack, Thomas D Coates, Richard M Leahy, John C Wood
Sickle cell disease (SCD) is a life-threatening genetic condition. Patients suffer from chronic systemic and cerebral vascular disease that leads to early and cumulative neurological damage. Few studies have quantified the effects of this disease on brain morphometry and even fewer efforts have been devoted to older patients despite the progressive nature of the disease. This study quantifies global and regional brain volumes in adolescent and young adult patients with SCD and racially matched controls with the aim of distinguishing between age related changes associated with normal brain maturation and damage from sickle cell disease...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28537569/inguinal-pain-syndrome-the-influence-of-intraoperative-local-administration-of-0-5-bupivacaine-on-postoperative-pain-control-following-lichtenstein-hernioplasty-a-prospective-case-control-study
#6
Bartosz Cybułka
With current technological advancement and availability of synthetic materials used in inguinal hernia repair, a recurrence after first intervention is not a common and important adverse event. On the other hand, however, some patients complain about chronic pain of the operated site after surgeries using a polypropylene mesh. Many patients are constrained to a prolonged use of analgesics and increased frequency of control visits, which may eventually result in loss of trust in the operator. Every surgical intervention is associated with the risk of immediate or delayed complications...
April 30, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/28536365/new-insights-into-the-pathophysiology-and-treatment-of-fibromyalgia
#7
REVIEW
Tobias Schmidt-Wilcke, Martin Diers
Fibromyalgia is characterized by chronic widespread pain and several additional symptoms such as fatigue, cognitive dysfunction, depressive episodes, and anxiety. The underlying pathophysiology of fibromyalgia is still poorly understood, and treatment is often unsatisfactory. Current research provides evidence for altered pain processing in chronic pain patients, and specifically in fibromyalgia patients, possibly based on altered functional connectivity and brain chemistry in brain regions within the pain processing system...
May 13, 2017: Biomedicines
https://www.readbyqxmd.com/read/28536294/the-interfaces-between-vitamin-d-sleep-and-pain
#8
Daniela Leite de Oliveira, Camila Hirotsu, Sergio Tufik, Monica Levy Andersen
The role of vitamin D in osteomineral metabolism is well known. Several studies have suggested its action on different biological mechanisms, such as nociceptive sensitivity and sleep-wake cycle modulation. Sleep is an important biological process regulated by different regions of the central nervous system, mainly the hypothalamus, in combination with several neurotransmitters. Pain, which can be classified as nociceptive, neuropathic and psychological, is regulated by both the central and peripheral nervous systems...
May 23, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28535555/paresthesia-independence-an-assessment-of-technical-factors-related-to-10-khz-paresthesia-free-spinal-cord-stimulation
#9
Giuliano De Carolis, Mery Paroli, Lara Tollapi, Matthew W Doust, Abram H Burgher, Cong Yu, Thomas Yang, Donna M Morgan, Kasra Amirdelfan, Leonardo Kapural, B Todd Sitzman, Richard Bundschu, Ricardo Vallejo, Ramsin M Benyamin, Thomas L Yearwood, Bradford E Gliner, Ashley A Powell, Kerry Bradley
BACKGROUND: Spinal cord stimulation (SCS) has been successfully used to treat chronic intractable pain for over 40 years. Successful clinical application of SCS is presumed to be generally dependent on maximizing paresthesia-pain overlap; critical to achieving this is positioning of the stimulation field at the physiologic midline. Recently, the necessity of paresthesia for achieving effective relief in SCS has been challenged by the introduction of 10 kHz paresthesia-free stimulation...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28535138/paramedian-submandibular-approach-for-removal-of-foreign-bodies-in-the-pterygoid-muscle-in-two-dogs
#10
Elizabeth Gettinger, Daniel Smeak, Angela Marolf
The purpose of this report is to document a unique location of an oropharyngeal foreign body, diagnosed via contrast computed tomography (CT), as well as a novel surgical approach to the pterygoid muscle region. Oropharyngeal foreign objects are an uncommon but potentially serious disease that can lead to chronic abscessation and pain. Two dogs were presented with chronic complaints, including pain and inability to fully open the mouth for a 1 yr and 5 mo duration, respectively. There was no history or evidence of skin sinus or submandibular/cervical swelling on physical examination of either dog...
May 23, 2017: Journal of the American Animal Hospital Association
https://www.readbyqxmd.com/read/28533761/the-frontal-area-with-higher-frequency-response-is-the-principal-feature-of-laser-evoked-potentials-in-rats-with-chronic-inflammatory-pain-a-parallel-factor-analysis-study
#11
Jing Wang, Juan Wang, You Wan, Xiaoli Li
Chronic pain is a pathological developing course of pain. In clinic, an objective indicator is needed for diagnosing and better controlling chronic pain. The abnormal neural responses in chronic pain are reflected by multiple event-related potentials (ERPs) in time, frequency, and location domain, respectively. However, multiple changes in ERPs are not applicable in clinic. So, the principal feature covered the most informative changes extracted from these three domains of ERP during the development of chronic pain is needed...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28533695/the-triallelic-serotonin-transporter-gene-polymorphism-is-associated-with-depressive-symptoms-in-adults-with-chronic-pain
#12
W Michael Hooten, Cynthia O Townsend, Christopher D Sletten
BACKGROUND: The serotonin (5-HT) transporter-linked polymorphic region (5-HTTLPR) moderates the relationship between stressful life events and depression. Given the high prevalence of depression in chronic pain, the primary aim of this preliminary study was to investigate the associations between the 5-HTTLPR and the severity of depressive symptoms in a cohort of adults with chronic pain. METHODS: Adults with chronic pain who were consecutively admitted to an outpatient pain rehabilitation program and met inclusion criteria were recruited for study participation (n=277)...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28533693/dna-methylation-at-the-mu-1-opioid-receptor-gene-oprm1-promoter-predicts-preoperative-acute-and-chronic-postsurgical-pain-after-spine-fusion
#13
Vidya Chidambaran, Xue Zhang, Lisa J Martin, Lili Ding, Matthew T Weirauch, Kristie Geisler, Bobbie L Stubbeman, Senthilkumar Sadhasivam, Hong Ji
INTRODUCTION: The perioperative pain experience shows great interindividual variability and is difficult to predict. The mu-1 opioid receptor gene (OPRM1) is known to play an important role in opioid-pain pathways. Since deoxyribonucleic acid (DNA) methylation is a potent repressor of gene expression, DNA methylation was evaluated at the OPRM1 promoter, as a predictor of preoperative, acute, and chronic postsurgical pain (CPSP). METHODS: A prospective observational cohort study was conducted in 133 adolescents with idiopathic scoliosis undergoing spine fusion under standard protocols...
2017: Pharmacogenomics and Personalized Medicine
https://www.readbyqxmd.com/read/28525633/scan-echo-for-pain-management-implementing-a-regional-telementoring-training-for-primary-care-providers
#14
Sherry Ball, Brigid Wilson, Scott Ober, Ali Mchaourab
Objective.:  The Specialty Care Access Network-Extension for Community Health Outcomes (SCAN-ECHO) is a video teleconferencing-based training program where primary care providers are trained by a specialty care team to provide specialty care. A multidisciplinary team of pain management specialists at the Cleveland Veterans Affairs Medical Center established such a program for pain management; a description and preliminary effectiveness assessment of this training program is presented...
May 19, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28524817/functional-dissociation-of-stimulus-intensity-encoding-and-predictive-coding-of-pain-in-the-insula
#15
Stephan Geuter, Sabrina Boll, Falk Eippert, Christian Büchel
The computational principles by which the brain creates a painful experience from nociception are still unknown. Classic theories suggest that cortical regions either reflect stimulus intensity or additive effects of intensity and expectations, respectively. By contrast, predictive coding theories provide a unified framework explaining how perception is shaped by the integration of beliefs about the world with mismatches resulting from the comparison of these believes against sensory input. Using functional magnetic resonance imaging during a probabilistic heat pain paradigm, we investigated which computations underlie pain perception...
May 19, 2017: ELife
https://www.readbyqxmd.com/read/28523214/complex-regional-pain-syndrome-the-matter-of-white-matter
#16
Jaakko Hotta, Guangyu Zhou, Hanna Harno, Nina Forss, Riitta Hari
INTRODUCTION: Many central pathophysiological aspects of complex regional pain syndrome (CRPS) are still unknown. Although brain-imaging studies are increasingly supporting the contribution of the central nervous system to the generation and maintenance of the CRPS pain, the brain's white-matter alterations are seldom investigated. METHODS: In this study, we used diffusion tensor imaging to explore white-matter changes in twelve CRPS-type-1 female patients suffering from chronic right upper-limb pain compared with twelve healthy control subjects...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28522185/orofacial-complex-regional-pain-syndrome-pathophysiologic-mechanisms-and-functional-mri
#17
Yeon-Hee Lee, Kyung Mi Lee, Hyug-Gi Kim, Soo-Kyung Kang, Q-Schick Auh, Jyung-Pyo Hong, Yang-Hyun Chun
Complex regional pain syndrome (CRPS) is one of the most challenging chronic pain conditions and is characterized by burning pain, allodynia, hyperalgesia, autonomic changes, trophic changes, edema, and functional loss involving mainly the extremities. Until recently, very few reports have been published concerning CRPS involving the orofacial area. We report on a 50-year-old female patient who presented with unbearable pain in all of her teeth and hypersensitivity of the facial skin. She also reported intractable pain in both extremities accompanied by temperature changes and orofacial pain that increased when the other pains were aggravated...
March 14, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28520647/altered-brain-structure-and-function-associated-with-sensory-and-affective-components-of-classic-trigeminal-neuralgia
#18
Yuan Wang, Dong-Yuan Cao, Bethany Remeniuk, Samuel Krimmel, David A Seminowicz, Ming Zhang
Classic trigeminal neuralgia (CTN) is a chronic neuropathic pain state characterized by intense, piercing spasms of the orofacial region, and may be attributable to abnormal pain processing in the central nervous system. Our study investigated neuronal alterations using voxel-based morphometry (VBM), diffuse tensor imaging (DTI), and resting state functional connectivity in 38 CTN patients and 38 matched healthy controls. For VBM analyses, CTN patients displayed gray matter volume (GMV) reductions in the anterior and mid cingulate cortex (ACC and MCC), insula, secondary somatosensory cortex (S2), primary motor cortex (M1), premotor area (PMA), and several regions in the temporal lobe...
May 16, 2017: Pain
https://www.readbyqxmd.com/read/28506878/pain-motor-integration-in-the-primary-motor-cortex-in-parkinson-s-disease
#19
A Suppa, C Leone, F Di Stasio, L Marsili, A Di Santo, A Biasiotta, S La Cesa, A Truini, G Cruccu, A Berardelli
BACKGROUND: In Parkinson's disease (PD), the influence of chronic pain on motor features has never been investigated. We have recently designed a technique that combines nociceptive system activation by laser stimuli and primary motor cortex (M1) activation through transcranial magnetic stimulation (TMS), in a laser-paired associative stimulation design (Laser-PAS). In controls, Laser-PAS induces long-term changes in motor evoked potentials reflecting M1 long-term potentiation-like plasticity, arising from pain-motor integration...
April 30, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28505350/evidence-of-altered-trigeminal-nociception-in-an-animal-model-of-fibromyalgia
#20
Masoud Nazeri, Mohammad-Reza Zarei, Amin-Reza Pourzare, Hamid-Reza Ghahreh-Chahi, Fatemeh Abareghi, Mohammad Shabani
Objective. : Fibromyalgia (FM) is a debilitating chronic condition that significantly affects quality of life. A strong association has been demonstrated between FM and chronic pain in the trigeminal region in clinical studies. This study was performed to evaluate the response to acute and chronic noxious stimuli applied to the facial region. Methods. : Adult male Wistar rats (250-270 g, N = 10 for each group) were used in the current study. A subchronic swim stress model was used as the animal model of FM...
May 13, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
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