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"Central Sensitization"

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https://www.readbyqxmd.com/read/29149149/decreased-regional-grey-matter-volume-in-women-with-chronic-whiplash-associated-disorders-relationships-with-cognitive-deficits-and-disturbed-pain-processing
#1
Iris Coppieters, Robby De Pauw, Karen Caeyenberghs, Lieven Danneels, Jeroen Kregel, Astrid Pattyn, Mira Meeus, Barbara Cagnie
BACKGROUND: Patients with chronic whiplash-associated disorders (CWAD) are characterized by pain of traumatic origin, cognitive deficits, and central sensitization (CS). Previous neuroimaging studies revealed altered grey matter volume (GMV) in mild traumatic brain injury patients and chronic pain conditions also characterized by CS. It can therefore be hypothesized that GMV alterations also play a role in the persistent complaints of CWAD. However, brain alterations remain poorly investigated in these patients...
November 2017: Pain Physician
https://www.readbyqxmd.com/read/29140922/fingolimod-reduces-neuropathic-pain-behaviors-in-a-mouse-model-of-multiple-sclerosis-by-a-sphingosine-1-phosphate-receptor-1-dependent-inhibition-of-central-sensitization-in-the-dorsal-horn
#2
Suzanne Doolen, Tommaso Iannitti, Benjamin C Shaw, Carolyn M Grachen, Renee R Donahue, Bradley K Taylor
Multiple sclerosis (MS) is an autoimmune-inflammatory neurodegenerative disease that is often accompanied by a debilitating neuropathic pain. Disease-modifying agents slow the progression of MS and prevent relapses, yet it remains unclear if they yield analgesia. We explored the analgesic potential of fingolimod (FTY720), an agonist/functional antagonist at the sphingosine-1-phosphate receptor 1 (S1PR1), because it reduces hyperalgesia in models of peripheral inflammatory and neuropathic pain. We used a myelin oligodendrocyte glycoprotein 35-55 (MOG35-55) mouse model of experimental autoimmune encephalomyelitis (EAE), modified to avoid frank paralysis and thus allow for assessment of withdrawal behaviors to somatosensory stimuli...
November 13, 2017: Pain
https://www.readbyqxmd.com/read/29125423/management-of-chronic-neuropathic-pain-with-single-and-compounded-topical-analgesics
#3
Nebojsa Nick Knezevic, Tatiana Tverdohleb, Farid Nikibin, Ivana Knezevic, Kenneth D Candido
The goal of our review was to emphasize important aspects that physicians should take into consideration when prescribing topical analgesics as part of chronic neuropathic pain treatment. We discuss the dermatopharmacokinetics and microstructural components of the skin, differences between topical and transdermal drug delivery, and topical medication effects on peripheral neuropathy and central sensitization. Even though the US FDA approved topical analgesics are 8%-capsaicin and 5%-lidocaine patches for treating postherpetic neuralgia, there are many other studies conducted on the efficacy of topical ketamine cream, clonidine gel, topical gabapentin, topical baclofen and topical phenytoin for peripheral neuropathic pain, either alone or in combination with other formulations...
November 10, 2017: Pain Management
https://www.readbyqxmd.com/read/29121294/low-dose-buprenorphine-infusion-to-prevent-postoperative-hyperalgesia-in-patients-undergoing-major-lung-surgery-and-remifentanil-infusion-a-double-blind-randomized-active-controlled-trial
#4
Marco Mercieri, Stefano Palmisani, Roberto A De Blasi, Antonio D'Andrilli, Alessia Naccarato, Barbara Silvestri, Sara Tigano, Domenico Massullo, Monica Rocco, Roberto Arcioni
Background: Postoperative secondary hyperalgesia arises from central sensitization due to pain pathways facilitation and/or acute opioid exposure. The latter is also known as opioid-induced hyperalgesia (OIH). Remifentanil, a potent μ-opioid agonist, reportedly induces postoperative hyperalgesia and increases postoperative pain scores and opioid consumption. The pathophysiology underlying secondary hyperalgesia involves N-methyl-D-aspartate (NMDA)-mediated pain pathways. In this study, we investigated whether perioperatively infusing low-dose buprenorphine, an opioid with anti-NMDA activity, in patients receiving remifentanil infusion prevents postoperative secondary hyperalgesia...
October 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29105477/-prospects-of-the-application-of-photoacoustic-technique-in-microcirculation-imaging-research-on-the-acupoints-sensitization
#5
Ning Ding, Jing Jiang, Ping-Ping Qin, Jia-Tong Hu, Qiao-Xia Wang, Yi-Yuan Xu, Xiao-Xiao Liu, Zhi-Gang Li
Research on the imaging of acupoint sensitization is inadequate, especially at the microcirculation level. Photoacoustic imaging is one of the main techniques used in microcirculation imaging, and has the characteristics of high contrast, high detection depth and high sensitivity for tissue function. In the present paper the authors briefly introduce photoacoustic imaging and review research advances in photoacoustic imaging of microcirculation from the aspects of structure and function. The photoacoustic technique can three-dimensionally image and quantitatively examine microcirculation structure to the depth of interest tissues with high spatial resolution, and can dynamically measure total hemoglobin concentration and its oxygenation level, blood flow velocity, oxygen metabolism level, vasoconstriction, vasodilation, and hemodynamics of a target vessel in real time...
October 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29095376/circulating-lipids-and-acute-pain-sensitization-an-exploratory-analysis
#6
Angela Starkweather, Thomas Julian, Divya Ramesh, Amy Heineman, Jamie Sturgill, Susan G Dorsey, Debra E Lyon, Dayanjan Shanaka Wijesinghe
BACKGROUND: In individuals with low back pain, higher lipid levels have been documented and were associated with increased risk for chronic low back pain. OBJECTIVES: The purpose of this research was to identify plasma lipids that discriminate participants with acute low back pain with or without pain sensitization as measured by quantitative sensory testing. METHODS: This exploratory study was conducted as part of a larger parent randomized controlled trial...
November 2017: Nursing Research
https://www.readbyqxmd.com/read/29094347/generalized-pain-sensitization-and-endogenous-oxytocin-in-individuals-with-symptoms-of-migraine-a-cross-sectional-study
#7
Dokyoung S You, Rachel Haney, Sergiu Albu, Mary W Meagher
OBJECTIVE: The current study examined pain and neurogenic inflammation responses to topical capsaicin during the interictal period (between headache) and their relationship with plasma oxytocin in individuals with migraine. BACKGROUND: Individuals with migraine can experience generalized (extracephalic) hyperalgesia, which can persist even between headache attacks. Elevated levels of plasma and cerebrospinal fluid oxytocin have been observed during migraine attacks, oxytocin levels being positively associated with the intensity of migraine symptoms...
November 2, 2017: Headache
https://www.readbyqxmd.com/read/29092067/regarding-modulation-of-central-sensitization-following-trigger-point-anesthetization-in-patients-with-chronic-pain-from-whiplash-trauma
#8
Karyn Laursen, Nalini Sehgal, Michelle Poliak-Tunis, Nathan J Rudin, Peggy Kim
No abstract text is available yet for this article.
October 28, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/29080683/interaction-between-astrocytic-colony-stimulating-factor-and-its-receptor-on-microglia-mediates-central-sensitization-and-behavioral-hypersensitivity-in-chronic-post-ischemic-pain-model
#9
Yuying Tang, Lian Liu, Dan Xu, Wensheng Zhang, Yi Zhang, Jieshu Zhou, Wei Huang
Accumulation of microglia occurs in the dorsal horn in the rodent model of chronic post ischemic pain (CPIP), while the mechanism how microglia affects the development of persistent pain largely remains unknown. Here, using a rodent model of CPIP induced by ischemia-reperfusion (IR) injury in the hindpaw, we observed that microglial accumulation occurred in the ipsilateral dorsal horn after ischemia 3h, and in ipsilateral and contralateral dorsal horn in the rats with ischemia 6h. The accumulated microglia released BDNF, increased neuronal excitability in dorsal horn, and produced pain behaviors in the modeled rodents...
October 30, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29079893/characterisation-of-pain-in-people-with-hereditary-neuropathy-with-liability-to-pressure-palsy
#10
Darren Beales, Robyn Fary, Cameron Little, Shruti Nambiar, Hakon Sveinall, Yen Leng Yee, Brigitte Tampin, Tim Mitchell
Hereditary neuropathy with liability to pressure palsy (HNPP) has historically been considered a pain-free condition, though some people with HNPP also complain of pain. This study characterised persistent pain in people with HNPP. Participants provided cross-sectional demographic data, information on the presence of neurological and persistent pain symptoms, and the degree to which these interfered with daily life. The painDETECT and Central Sensitization Inventory questionnaires were used to indicate potential neuropathic, central sensitisation and musculoskeletal (nociceptive) pain mechanisms...
October 27, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29077621/a-systematic-review-of-atypical-antipsychotics-in-chronic-pain-management-olanzapine-demonstrates-potential-in-central-sensitization-fibromyalgia-and-headache-migraine
#11
Xavier F Jimenez, Tharani Sundararajan, Edward C Covington
INTRODUCTION: Many psychopharmacologic agents are used as primary or adjunct agents in pain management. Atypical antipsychotics (AAs) have also been used as adjuncts in pain management regimens in a variety of manners; however, their efficacy in this capacity is unclear. METHODS: A systematic review of all studies examining AA use for pain was conducted. Three literature databases were utilized to search for word combinations of "pain" and a variety of commonly-prescribed AAs (olanzapine, quetiapine, risperidone, aripiprazole, ziprasidone, clozapine, paliperidone, iloperidone, lurasidone)...
October 26, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/29057523/aging-related-changes-in-the-cortical-processing-of-otolith-information-in-humans
#12
Peter Zu Eulenburg, Ria Maxine Ruehl, Pia Runge, Marianne Dieterich
Acoustic short tone bursts (STB) trigger ocular and cervical vestibular evoked myogenic potentials (oVEMPs/cVEMPs) by activating irregular otolith afferents. Simultaneously, STBs introduce an artificial net acceleration signal of otolith origin into the vestibular network. VEMP parameters as diagnostic otolith processing markers have been shown to decline after the age of thirty. To delineate the differential effects of healthy aging on the cortical vestibular subnetwork processing otolith information, we measured cVEMPs and the differential effects of unilateral STB in three age groups (20-40, 40-60, 60+; n=42) using functional neuroimaging...
October 23, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29057068/case-report-percutaneous-electrical-neural-field-stimulation-in-two-cases-of-sympathetically-mediated-pain
#13
Lynn Fraser, Anna Woodbury
Background: Fibromyalgia and complex regional pain syndrome (CRPS) are both chronic pain syndromes with pathophysiologic mechanisms related to autonomic nervous system dysregulation and central sensitization.  Both syndromes are considered difficult to treat with conventional pain therapies. Case presentations: Here we describe a female veteran with fibromyalgia and a male veteran with CRPS, both of whom failed multiple pharmacologic, physical and psychological therapies for pain, but responded to percutaneous electrical neural field stimulation (PENFS) targeted at the auricular branches of the cranial nerves...
2017: F1000Research
https://www.readbyqxmd.com/read/29053129/-medication-overuse-headache
#14
M Yu Maksimova, T Yu Сhochlova, L A Mota
Rebound headache (RH) is a chronic daily headache which occurs when analgesics, triptans, ergotamines are taken frequently (more than 15 days/month for more than 3 months) to relieve headaches. The prevalence of RH is 1 to 4% in the general population. RH commonly occurs in patients with migraine and tension-type headache. The deficit of central sensitization and psychological factors play an important role in initiating and maintaining of RH. Treatment of noofen for 2 months is effective in 75% of patients with RH...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/29045243/use-of-ketamine-in-a-multimodal-analgesia-setting-for-rapid-opioid-tapering-in-a-profoundly-opioid-tolerant-patient-a-case-report
#15
Elise M Strickler, Eric S Schwenk, Mitchell J Cohen, Eugene R Viscusi
Opioids are frequently used for the treatment of chronic pain, and patients taking high doses are at increased risk of complications and adverse opioid-related events. Ketamine is appealing as an opioid adjunct because of its lack of respiratory depression and potential prevention of hyperalgesia and central sensitization. We present a case in which a ketamine infusion was utilized over a 7-day period to provide rapid taper of a daily dose of 400 mg of morphine equivalents to less than one-third of that dose on discharge with unchanged pain levels and no symptoms of opioid withdrawal...
October 17, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/29033640/identification-of-allodynic-migraine-patients-with-the-turkish-version-of-the-allodynia-symptom-checklist-reliability-and-consistency-study
#16
Osman Özgür Yalin, Derya Uludüz, Mehmet Ali Sungur, Hande Sart, Aynur Özge
INTRODUCTION: Cutaneous allodynia is regarded as an expression of central sensitization in migraine. Although the gold standard is quantitative sensory testing, several practical assessment questionnaires have been developed to assess allodynia in migraine. We aimed to establish the first valid Turkish allodynia assessment questionnaire based on a 12-item allodynia symptom checklist and to evaluate the associated factors. METHODS: The first part of the study included the translation and cultural adaptation of a Turkish version of the checklist...
September 2017: Noro Psikiyatri Arsivi
https://www.readbyqxmd.com/read/29032189/laser-evoked-potentials-in-painful-radiculopathy
#17
P Hüllemann, C von der Brelie, G Manthey, J Düsterhöft, A K Helmers, M Synowitz, J Gierthmühlen, R Baron
OBJECTIVE: The aims of this exploratory study were (1) to develop a standardized objective electrophysiological technique with laser-evoked potentials to assess dorsal root damage quantitatively and (2) to correlate these LEP measures with clinical parameters and sensory abnormalities (QST) in the affected dermatome. METHODS: Thirty-eight patients with painful radiculopathy and 20 healthy subjects were investigated with LEP recorded from the affected dermatome and control areas as well as with quantitative sensory testing...
September 28, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28992938/bilateral-carpal-tunnel-syndrome-a-review
#18
REVIEW
Pawel Dec, Andrzej Zyluk
Carpal tunnel syndrome (CTS) is the most common upper extremity compressive neuropathy, with a prevalence of 3%-5% in the general population, and 6% in the group of females over the age of 40. It occurs about five times more common in females, with 2 peaks observed, in the 6th and 8th decades of life. Bilateral manifestation is more common than unilateral (60%), but significantly more often begins or is more strongly expressed in the dominant hand. Possible anatomical abnormalities underlying the development of CTS account for about 5% of cases...
October 2, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28986567/enhancing-excitatory-activity-of-somatosensory-cortex-alleviates-neuropathic-pain-through-regulating-homeostatic-plasticity
#19
Wenhui Xiong, Xingjie Ping, Matthew S Ripsch, Grace Santa Cruz Chavez, Heidi Elise Hannon, Kewen Jiang, Chunhui Bao, Vaishnavi Jadhav, Lifang Chen, Zhi Chai, Cungen Ma, Huangan Wu, Jianqiao Feng, Armin Blesch, Fletcher A White, Xiaoming Jin
Central sensitization and network hyperexcitability of the nociceptive system is a basic mechanism of neuropathic pain. We hypothesize that development of cortical hyperexcitability underlying neuropathic pain may involve homeostatic plasticity in response to lesion-induced somatosensory deprivation and activity loss, and can be controlled by enhancing cortical activity. In a mouse model of neuropathic pain, in vivo two-photon imaging and patch clamp recording showed initial loss and subsequent recovery and enhancement of spontaneous firings of somatosensory cortical pyramidal neurons...
October 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28984096/preventative-effect-of-ketamine-on-post-surgical-hyperalgesia-induced-at-a-body-part-remote-from-the-surgical-site-a-randomized-controlled-trial
#20
Young-Eun Moon, Mi-Hyun Kim, Hyung-Mook Lee, Hyo-Min Yoon, Young-Jae Jeon
BACKGROUND: It is known that pain hypersensitivity can be induced at a body part remote from a surgical site (tertiary hyperalgesia), leading to patient discomfort. Nevertheless, no reported study to date has investigated methods to attenuate such tertiary hyperalgesia. Ketamine is known to modulate hyperalgesia induced by central sensitization. Thus, we investigated whether intraoperative administration of ketamine could decrease post-surgical tertiary hyperalgesia in patients undergoing a laparoscopic hysterectomy...
October 4, 2017: Minerva Anestesiologica
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