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https://www.readbyqxmd.com/read/28817806/specialized-mechanosensory-nociceptors-mediating-rapid-responses-to-hair-pull
#1
Nima Ghitani, Arnab Barik, Marcin Szczot, James H Thompson, Chia Li, Claire E Le Pichon, Michael J Krashes, Alexander T Chesler
The somatosensory system provides animals with the ability to detect, distinguish, and respond to diverse thermal, mechanical, and irritating stimuli. While there has been progress in defining classes of neurons underlying temperature sensation and gentle touch, less is known about the neurons specific for mechanical pain. Here, we use in vivo functional imaging to identify a class of cutaneous sensory neurons that are selectively activated by high-threshold mechanical stimulation (HTMRs). We show that their optogenetic excitation evokes rapid protective and avoidance behaviors...
August 16, 2017: Neuron
https://www.readbyqxmd.com/read/28817717/short-report-trpv1-polymorphism-1911-a-g-alters-capsaicin-induced-sensory-changes-in-healthy-subjects
#2
Julia Forstenpointner, Matti Förster, Denisa May, Friederike Hofschulte, Ingolf Cascorbi, Gunnar Wasner, Janne Gierthmühlen, Ralf Baron
BACKGROUND: C-fibers express transient receptor potential (TRP) channels. These high-voltage gated channels function as integrators of different physical stresses (e.g. heat, protons, ATP). Additionally channel activation can be induced by capsaicin. Topically applied, capsaicin elicits burning pain, heat and mechanical hyperalgesia and serves as a human surrogate model for pain. It was suggested that the TRPV1-variant rs8065080 (1911A>G) plays a pivotal role in patients with neuropathic pain syndromes...
2017: PloS One
https://www.readbyqxmd.com/read/28817412/effect-of-physical-methods-of-lymphatic-drainage-on-postexercise-recovery-of-mixed-martial-arts-athletes
#3
Aleksandra Zebrowska, Robert Trybulski, Robert Roczniok, Wieslaw Marcol
OBJECTIVE: Physical methods are reported to be important for accelerating skeletal muscle regeneration, decreasing muscle soreness, and shortening of the recovery time. The aim of the study was to assess the effect of the physical methods of lymphatic drainage (PMLD) such as manual lymphatic drainage (MLD), the Bodyflow (BF) therapy, and lymphatic drainage by deep oscillation (DO) on postexercise regeneration of the forearm muscles of mixed martial arts (MMA) athletes. DESIGN AND METHODS: Eighty MMA athletes aged 27...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817409/trest-as-a-new-diagnostic-variable-for-chronic-exertional-compartment-syndrome-of-the-forearm-a-prospective-cohort-analysis-of-124-athletes
#4
Sergi Barrera-Ochoa, Eva Correa-Vazquez, Irene Gallardo-Calero, Sleiman Haddad, Andrea Sallent, Francisco Soldado, David Campillo-Recio, Xavier Mir-Bullo
OBJECTIVES: To measure the accuracy of currently used intracompartmental pressure (ICP) diagnostic variables for forearm chronic exertional compartment syndrome (CECS) and a new ICP diagnostic variable, TRest, the recovery time between the maximum ICP and return to resting pressure. DESIGN: Retrospective cohort. Level evidence IV. SETTING: University-affiliated tertiary hospital. PARTICIPANTS: Patients with suspected forearm CECS, 1990 to 2014...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28816281/-application-of-flurbiprofen-axetil-in-pain-management-associated-during-transrectal-ultrasound-guided-prostate-biopsy
#5
K Lan, W B Yang, X W Zhang, W J Bai, Q Li, T Xu
OBJECTIVE: To examine the effects of perioperative intravenous administration of flurbiprofen axetil (FA) on pain associated with transrectal ultrasound-guided prostate biopsy. METHODS: This was a randomized,controlled study. Eighty-one patients who underwent 12 core prostate biopsy were included in the study. The patients were randomly assigned to one of three groups (n=27 in each) by type of procedure during prostate biopsy. Group intrarectal local anesthesia (IRLA) received intrarectal 5% (0...
August 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28814157/the-role-and-mechanism-of-glutamic-nmda-receptor-in-the-mechanical-hyperalgesia-in-diabetic-rats
#6
Jin Wang, Zhaohui Sun, Yuzhao Wang, Huisheng Wang, Yuan Guo
OBJECTIVES: Some studies have shown that painful neuropathy is a common and costly complication of both type 1 and type 2 diabetes mellitus, and glutamate is involved in the process although the mechanisms are not clear. The purpose of the present study was to investigate the effect of N-methyl-D-aspartate (NMDA) receptor on mechanical hyperalgesia in diabetic rats and the possible mechanism. METHODS: Diabetic rat model was established by intraperitoneal injection of streptozotocin (STZ, 1%, 70 mg/kg) once, and evaluated by the change in the fasting blood glucose...
August 17, 2017: Neurological Research
https://www.readbyqxmd.com/read/28812209/effect-of-vitamin-d-supplementation-in-chronic-widespread-pain-a-systematic-review-and-meta-analysis
#7
Wai Chung Yong, Anawin Sanguankeo, Sikarin Upala
Chronic non-specific widespread pain (CWP) including fibromyalgia (FMS) is characterized by widespread pain, reduced pain threshold, and multiple tender points on examination, causing disability and decreased quality of life. Vitamin D has been proposed as an associated factor in CWP. This meta-analysis aimed to explore the benefit of vitamin D supplementation in the management of CWP. A comprehensive search of the CENTRAL, MEDLINE, and Embase databases was performed from inception through January 2017. The inclusion criterion was the randomized clinical trials' evaluating the effects of vitamin D treatment in adult subjects with CWP or FMS...
August 15, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28810992/two-new-effective-tourniquets-for-potential-use-in-the-military-environment-a-serving-soldier-study
#8
Alastair Beaven, Rob Briard, Mark Ballard, Paul Parker
BACKGROUND: Limb tourniquets have been used extensively during modern Middle Eastern conflicts. Despite its undeniable successes, the combat applied tourniquet (C-A-T) has some shortfalls, principally its inability to reliably control lower limb bleeding when applied to the mid-thigh. We tested two tourniquets which may represent an improvement to the combat applied tourniquet; the tactical mechanical tourniquet and the tactical pneumatic tourniquet. METHODS: We recruited 12 healthy service personnel and applied the tactical mechanical tourniquet and tactical pneumatic tourniquet to both lower limbs in a randomly generated sequence...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28805585/understanding-and-treating-pain-syndromes-in-parkinson-s-disease
#9
Marialuisa Gandolfi, Christian Geroin, Angelo Antonini, Nicola Smania, Michele Tinazzi
Pain affects many people with Parkinson's disease (PD) and diminishes their quality of life. Different types of pain have been described, but their related pathophysiological mechanisms remain unclear. The aim of this chapter is to provide movement disorders specialists an update about the pathophysiology of pain and a practical guide for the management of pain syndromes in clinical practice. This chapter reviews current knowledge on the pathophysiological mechanisms of sensory changes and pain in PD, as well as assessment and treatment procedures to manage these symptoms...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28805288/conditioned-pain-modulation-is-affected-by-occlusion-cuff-conditioning-stimulus-intensity-but-not-duration
#10
A Smith, A Pedler
BACKGROUND: Various conditioned pain modulation (CPM) methodologies have been used to investigate diffuse noxious inhibitory control pain mechanisms in healthy and clinical populations. Occlusion cuff parameters have been poorly studied. We aimed to investigate whether occlusion cuff intensity and/or duration influenced CPM magnitudes. We also investigated the role of physical activity levels on CPM magnitude. METHODS: Two studies were performed to investigate the role of intensity and duration of occlusion cuff conditioning stimulus on test stimulus (tibialis anterior pressure pain thresholds)...
August 14, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28800711/getting-better-or-getting-well-the-patient-acceptable-symptom-state-pass-better-predicts-patient-s-satisfaction-than-the-decrease-of-pain-in-knee-osteoarthritis-subjects-treated-with-viscosupplementation
#11
Thierry Conrozier, Matthieu Monet, Anne Lohse, Raghu Raman
Background In the management of knee osteoarthritis (OA), patient-reported-outcomes (PROs) are being developed for relevant assessment of pain. The patient acceptable symptom state (PASS) is a relevant cutoff, which allows classifying patients as being in "an acceptable state" or not. Viscosupplementation is a therapeutic modality widely used in patients with knee OA that many patients are satisfied with despite meta-analyses give conflicting results. Objectives To compare, 6 months after knee viscosupplementation, the percentage of patients who reached the PASS threshold (PASS +) with that obtained from other PROs...
August 1, 2017: Cartilage
https://www.readbyqxmd.com/read/28799972/increased-pain-sensitivity-in-accident-related-chronic-pain-patients-with-comorbid-posttraumatic-stress
#12
Henrik Bjarke Vaegter, Tonny Elmose Andersen, Mathea Harvold, Per Grunwald Andersen, Thomas Graven-Nielsen
OBJECTIVES: Posttraumatic stress disorder (PTSD) is prevalent in chronic pain, and associated with increased pain, hyperalgesia and psychological distress. This study aimed to investigate anti-nociceptive and pro-nociceptive pain mechanisms, pain intensity, and psychological distress (depression, anxiety, pain catastrophizing, and fear of movement) in patients with accident-related chronic spinal pain with (N=44) and without (N=64) comorbid PTSD characteristics. METHODS: Cuff algometry was performed on lower legs to assess pressure pain threshold (cPPT), tolerance (cPTT), temporal summation of pain (TSP: increase in pain scores to ten repeated stimulations), and conditioning pain modulation (CPM: increase in cPPT during cuff pain conditioning on the contralateral leg)...
August 9, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28798976/5-ht-modulation-of-pain-perception-in-humans
#13
Sarah L Martin, Andrea Power, Yvonne Boyle, Ian M Anderson, Monty A Silverdale, Anthony K P Jones
INTRODUCTION: Although there is clear evidence for the serotonergic regulation of descending control of pain in animals, little direct evidence exists in humans. The majority of our knowledge comes from the use of serotonin (5-HT)-modulating antidepressants as analgesics in the clinical management of chronic pain. OBJECTIVES: Here, we have used an acute tryptophan depletion (ATD) to manipulate 5-HT function and examine its effects of ATD on heat pain threshold and tolerance, attentional manipulation of nociceptive processing and mood in human volunteers...
August 10, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28798688/establishment-and-characterization-of-a-novel-rat-model-of-mechanical-low-back-pain-using-behavioral-pharmacologic-and-histologic-methods
#14
Arjun Muralidharan, Thomas S W Park, John T Mackie, Luiz G S Gimenez, Andy Kuo, Janet R Nicholson, Laura Corradini, Maree T Smith
Chronic low back pain (LBP), the leading cause of disability globally, is notoriously difficult to treat. Most rodent models of LBP mimic lumbar radicular pain rather than mechanical LBP. Here, we describe establishment of a new rat model of mechanical LBP that is devoid of a neuropathic component. Groups of adult male Sprague Dawley rats were anesthetized and their lumbar L4/L5 and L5/L6 intervertebral disks (IVDs) were punctured (0.5 mm outer diameter, 2mm-deep) 5 (LPB-5X), or 10 (LBP-10X) times per disk...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28797281/the-efficacy-of-transcutaneous-electrical-nerve-stimulation-on-the-improvement-of-walking-distance-in-patients-with-peripheral-arterial-disease-with-intermittent-claudication-study-protocol-for-a-randomised-controlled-trial-the-tens-pad-study
#15
Florent Besnier, Jean-Michel Sénard, Vincent Grémeaux, Mélanie Riédel, Damien Garrigues, Thibaut Guiraud, Marc Labrunée
BACKGROUND: In patients with peripheral arterial disease (PAD), walking improvements are often limited by early pain onset due to vascular claudication. It would thus appear interesting to develop noninvasive therapeutic strategies, such as transcutaneous electrical nerve stimulation (TENS), to improve the participation of PAD patients in rehabilitation programmes, and thus improve their quality of life. Our team recently tested the efficacy of a single 45-min session of 10-Hz TENS prior to walking...
August 10, 2017: Trials
https://www.readbyqxmd.com/read/28796720/srs-22r-scores-in-nonoperated-adolescent-idiopathic-scoliosis-patients-with-curves-greater-than-forty-degrees
#16
W Timothy Ward, Nicole A Friel, Tanya S Kenkre, Maria M Brooks, Joanne A Londino, James W Roach
STUDY DESIGN: Case control comparative series. OBJECTIVE: Describe surgical range adolescent idiopathic scoliosis (AIS) patients electing to forgo surgery and compare health-related quality-of-life outcomes to a similar cohort of operated AIS patients by the same single surgeon. SUMMARY OF BACKGROUND DATA: No data have been published either documenting SRS-22r scores of nonoperated patients with curves ≥40° or comparing these scores to a demographically similar operated cohort...
August 15, 2017: Spine
https://www.readbyqxmd.com/read/28796115/cerebral-white-matter-structure-is-disrupted-in-gulf-war-veterans-with-chronic-musculoskeletal-pain
#17
Stephanie M VanRiper, Andrew L Alexander, Kelli F Koltyn, Aaron J Stegner, Laura D Ellingson, Daniel J Destiche, Ryan J Dougherty, Jacob B Lindheimer, Dane B Cook
Chronic musculoskeletal pain (CMP) affects ∼25% of the 700,000 Veterans deployed during the Persian Gulf War (1990-91). The cause of their pain is unknown and there are no efficacious treatments. A small body of literature suggests that brain abnormalities exist in Gulf War Veterans (GVs), yet relationships between brain abnormalities and disease symptoms remain largely unexplored. Our purpose was to compare white matter (WM) integrity between GVCMP and matched, healthy Veteran controls (GVCO) and investigate relationships between cerebral WM integrity and symptoms...
August 8, 2017: Pain
https://www.readbyqxmd.com/read/28794847/neuro-otological-and-peripheral-nerve-involvement-in-fabry-disease
#18
Sergio Carmona, Romina Weinschelbaum, Ana Pardal, Cintia Marchesoni, Paz Zuberbuhler, Patricia Acosta, Guillermo Cáceres, Isaac Kisinovsky, Luciana Bayón, Ricardo Reisin
Fabry disease (FD) is an X-linked lysosomal storage disease, with multisystemic glycosphingolipids deposits. Neuro-otological involvement leading to hearing loss and vestibular dysfunctions has been described, but there is limited information about the frequency, site of lesion, or the relationship with peripheral neuropathy. The aim was to evaluate the presence of auditory and vestibular symptoms, and assess neurophysiological involvement of the VIII cranial nerve, correlating these findings with clinical and neurophysiological features of peripheral neuropathy...
July 18, 2017: Audiology Research
https://www.readbyqxmd.com/read/28794197/hyperalgesia-and-sensitization-of-dorsal-horn-neurons-following-activation-of-nk-1-receptors-in-the-rostral-ventromedial-medulla
#19
Sergey G Khasabov, Patrick Malecha, Joseph Noack, Janneta Tabakov, Glenn J Giesler, Donald A Simone
Neurons in the rostral ventromedial medulla (RVM) project to the spinal cord and are involved in descending modulation of pain. Several studies have shown that activation of neurokinin-1 (NK-1) receptors in the RVM produces hyperalgesia, although underlying mechanisms are not clear. In parallel studies, we compared behavioral measures of hyperalgesia to electrophysiological responses of nociceptive dorsal horn neurons produced by activation of NK-1 receptors in the RVM. Injection of the selective NK-1 receptor agonist, Sar9,Met(O2)(11)-Substance P (SSP) into the RVM produced dose-dependent mechanical and heat hyperalgesia that was blocked by co-administration of the selective NK-1 receptor antagonist, L-733,060...
August 9, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28793322/stool-consistency-is-significantly-associated-with-pain-perception
#20
Yukiko Shiro, Young-Chang Arai, Tatsunori Ikemoto, Kazuhiro Hayashi
BACKGROUND: Commensal as well as pathogenic bacteria can influence a variety of gut functions, thereby leading to constipation and diarrhea in severe cases. In fact, several researchers have reported evidence supporting the association between stool consistency or constipation and the Gut microbiome (GM) composition and dysbiosis. GM influences the human health and disease via the gut-brain axis. We thus hypothesized that the pathogenic bacteria increases pain perception to some extent, which means that there could be an association between stool consistency or constipation and pain perception of healthy subjects...
2017: PloS One
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