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Quantitative sensorial

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https://www.readbyqxmd.com/read/28632555/changes-in-cytokines-sensory-tests-and-self-reported-pain-levels-after-manual-treatment-of-low-back-pain
#1
Brian F Degenhardt, Jane C Johnson, Christian Fossum, Chad T Andicochea, Melissa K Stuart
STUDY DESIGN: Unbalanced 3-factor design with repeated measures on 1 factor. OBJECTIVE: To determine the effect of manual treatment (MT) on cytokine and pain sensations in those with and without low back pain (LBP). SUMMARY OF BACKGROUND DATA: Evidence suggests that MT reduces LBP but by unknown mechanisms. Certain cytokines have been elevated in patients with LBP and may be affected by MT. METHODS: Participants aged 20-60 years with chronic LBP or without LBP were recruited and randomly assigned to MT, sham ultrasound treatment, or no treatment groups...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28623897/altered-somatosensory-profile-according-to-quantitative-sensory-testing-in-patients-with-degenerative-lumbar-spine-disorders-scheduled-for-surgery
#2
Yvonne Lindbäck, Hans Tropp, Paul Enthoven, Björn Gerdle, Allan Abbott, Birgitta Öberg
BACKGROUND: Somatosensory profiling in affected and non-affected body regions can strengthen our insight regarding the underlying pain mechanisms, which can be valuable in treatment decision making and to improve outcomes, in patients with degenerative lumbar spine disorders pre-surgery. The aim was to describe somatosensory profiles in patients with degenerative lumbar spine disorders, to identify the proportion with altered somatosensory profile, and to analyze demographic characteristics, self-reported function, pain, and health pre- and 3 months post-surgery...
June 17, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28620228/a-sensory-material-approach-for-reducing-variability-in-additively-manufactured-metal-parts
#3
B E Franco, J Ma, B Loveall, G A Tapia, K Karayagiz, J Liu, A Elwany, R Arroyave, I Karaman
Despite the recent growth in interest for metal additive manufacturing (AM) in the biomedical and aerospace industries, variability in the performance, composition, and microstructure of AM parts remains a major impediment to its widespread adoption. The underlying physical mechanisms, which cause variability, as well as the scale and nature of variability are not well understood, and current methods are ineffective at capturing these details. Here, a Nickel-Titanium alloy is used as a sensory material in order to quantitatively, and rather rapidly, observe compositional and/or microstructural variability in selective laser melting manufactured parts; thereby providing a means to evaluate the role of process parameters on the variability...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620156/the-effect-of-lasik-surgery-on-myopic-anisometropes-sensory-eye-dominance
#4
Lixia Feng, Huimin Lin, Yao Chen, Jiafeng Wang, Yonghua Wang, Rongfeng Liao, Jiawei Zhou, Robert F Hess
Lasik is a common surgery for treating anisometropia. In this study, we asked a specific question: what's the effect of Lasik surgery on anisometropes' sensory eye dominance ? Fifteen myopic anisometropes (mean age: 23 ± 6.9 years old; 6 females) participated in our experiment. We quantitatively measured participants' sensory eye dominance before and after the Lasik surgery using a binocular phase combination paradigm. We found no significant change of sensory eye dominance within 16 weeks (measured between 8 to 96 days, for one or two repetitions) after the surgery (t(14) = -1...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28619697/depression-and-pain-in-asian-americans-and-whites-with-knee-osteoarthritis
#5
Hyochol Ahn, Michael Weaver, Debra Lyon, Eunyoung Choi, Roger B Fillingim
Few studies have examined the underlying psychosocial mechanisms of pain in Asian Americans. Using the biopsychosocial model, we sought to determine whether variations in depression contribute to racial group differences in symptomatic knee osteoarthritis pain between Asian Americans and non-Hispanic whites. The sample consisted of 100 participants, including 50 Asian Americans (28 Korean Americans, 9 Chinese Americans, 7 Japanese Americans, 5 Filipino Americans, and 1 Indian American) and 50 age- and sex-matched non-Hispanic whites with symptomatic knee osteoarthritis pain...
June 12, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28615966/acute-physiological-and-electrical-accentuation-of-vagal-tone-has-no-effect-on-pain-or-gastrointestinal-motility-in-chronic-pancreatitis
#6
Jacob Juel, Christina Brock, Søren S Olesen, Adnan Madzak, Adam D Farmer, Qasim Aziz, Jens B Frøkjær, Asbjørn Mohr Drewes
BACKGROUND: The effective management of pain in chronic pancreatitis (CP) remains a therapeutic challenge. Analgesic drugs, such as opioids, and the underlying pathology can impair gut function. The autonomic nervous system influences hormone secretion and gut motility. In healthy volunteers, electrical (using noninvasive transcutaneous vagal nerve stimulation [t-VNS]) and physiological (using deep slow breathing [DSB]) modulation of parasympathetic tone results in pain attenuation and enhanced gut motility...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28614969/short-hospitalization-after-caesarean-delivery-effects-on-maternal-pain-and-stress-at-discharge
#7
Vincenzo Zanardo, Lara Giliberti, Francesca Volpe, Alphonse Simbi, Pietro Guerrini, Matteo Parotto, Gianluca Straface
PURPOSE: To characterize predischarge maternal pain and stress after Caesarean delivery and short hospitalization. MATERIALS AND METHODS: This is a descriptive study with 60 women in the postoperative period of Caesarean section and 60 control women after vaginal delivery. Pain and stress were measured by McGill Pain Questionnaire (MGPQ, Melzack and Torgerson, 1971) and by the Stress Measure (Psychological Stress Measure (PSM), Lemyre, 1987), respectively at mother-infant dyad discharge, scheduled at 36 hours after delivery...
June 14, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28614384/antennal-transcriptome-analysis-of-the-piercing-moth-oraesia-emarginata-lepidoptera-noctuidae
#8
Bo Feng, Qianshuang Guo, Kaidi Zheng, Yuanxia Qin, Yongjun Du
The piercing fruit moth Oraesia emarginata is an economically significant pest; however, our understanding of its olfactory mechanisms in infestation is limited. The present study conducted antennal transcriptome analysis of olfactory genes using real-time quantitative reverse transcription PCR analysis (RT-qPCR). We identified a total of 104 candidate chemosensory genes from several gene families, including 35 olfactory receptors (ORs), 41 odorant-binding proteins, 20 chemosensory proteins, 6 ionotropic receptors, and 2 sensory neuron membrane proteins...
2017: PloS One
https://www.readbyqxmd.com/read/28614190/non-histaminergic-and-mechanical-itch-sensitization-in-atopic-dermatitis
#9
H H Andersen, J Elberling, H Sølvsten, G Yosipovitch, L Arendt-Nielsen
Chronic or episodic severe itch is recurrent in atopic dermatitis (AD). Non-histaminergic neuronal itch pathways are suggested to dominate in AD itch, contributing to an "itch-scratch-itch cycle" that prolongs and worsens itch, pain, and skin lesions. We hypothesized that non-histaminergic neuronal sensitization contributes to itch in AD. Hence, we compared sensitivity to thermal, mechanical, and chemical pruritic stimuli in AD patients and controls. The study comprised 25 AD patients with chronic itch and 25 healthy controls...
June 9, 2017: Pain
https://www.readbyqxmd.com/read/28614189/a-dose-response-study-of-topical-allyl-isothiocyanate-mustard-oil-as-human-surrogate-model-of-pain-hyperalgesia-and-neurogenic-inflammation
#10
H H Andersen, S Lo Vecchio, P Gazerani, L Arendt-Nielsen
Despite being a ubiquitous animal pain model, the natural TRPA1-agonist allyl-isothiocyanate (AITC, also known as "mustard oil") has only been sparsely investigated as a potential human surrogate model of pain, sensitization, and neurogenic inflammation. Its dose-response as an algogenic, sensitizing irritant remains to be elucidated in human skin. Three concentrations of AITC (10%, 50%, 90%) and vehicle (paraffin) were applied for 5 min to 3x3 cm areas on the volar forearms in 14 healthy volunteers, and evoked pain intensity (visual analog scale 0-100 mm) and pain quality were assessed...
June 9, 2017: Pain
https://www.readbyqxmd.com/read/28614187/translational-pain-assessment-could-natural-animal-models-be-the-missing-link
#11
Mary P Klinck, Jeffrey S Mogil, Maxim Moreau, B Duncan X Lascelles, Paul A Flecknell, Thierry Poitte, Eric Troncy
Failure of analgesic drugs in clinical development is common. Along with the current "reproducibility crisis" in pain research, this has led some to question the use of animal models. Experimental models tend to comprise genetically homogeneous groups of young, male rodents in restricted and unvarying environments, and pain-producing assays that may not closely mimic the natural condition of interest. In addition, typical experimental outcome measures using thresholds or latencies for withdrawal may not adequately reflect clinical pain phenomena pertinent to human patients...
June 9, 2017: Pain
https://www.readbyqxmd.com/read/28613900/solid-state-nmr-provides-evidence-for-small-amplitude-slow-domain-motions-in-a-multi-spanning-transmembrane-%C3%AE-helical-protein
#12
Daryl Good, Charlie Pham, Jacob Jagas, Józef R Lewandowski, Vladimir Ladizhansky
Proteins are dynamic entities and populate ensembles of conformations. Transitions between states within a conformational ensemble occur over a broad spectrum of amplitude and time scales, and are often related to biological function. Whereas solid-state NMR (SSNMR) spectroscopy has recently been used to characterize conformational ensembles of proteins in the microcrystalline states, its applications to membrane proteins remain limited. Here we use SSNMR to study conformational dynamics of a seven-helical transmembrane (TM) protein, Anabaena Sensory Rhodopsin (ASR) reconstituted in lipids...
June 14, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28602692/psychological-characteristics-and-pain-frequency-are-associated-with-experimental-pain-sensitivity-in-pediatric-patients-with-sickle-cell-disease
#13
Nitya Bakshi, Ines Lukombo, Helen Shnol, Inna Belfer, Lakshmanan Krishnamurti
Sickle Cell Disease (SCD) is associated with episodes of severe vasocclusive pain beginning in infancy with a subset of patients with SCD transitioning to chronic pain. Response to experimental pain using Quantitative Sensory Testing (QST) in these patients suggest altered pain processing. The objectives of this study were to characterize sensitivity to multiple modalities of experimental pain stimuli and to interrogate the relationship of psychological covariates, clinical pain burden and pain-related outcomes to experimental pain sensitivity in children with SCD as compared to healthy individuals of similar age and sex...
June 5, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28601632/intraspecific-gestural-laterality-in-chimpanzees-and-gorillas-and-the-impact-of-social-propensities
#14
Jacques Prieur, Simone Pika, Stéphanie Barbu, Catherine Blois-Heulin
A relevant approach to address the mechanisms underlying the emergence of the right-handedness/left-hemisphere language specialization of humans is to investigate both proximal and distal causes of language lateralization through the study of non-human primates' gestural laterality. We carried out the first systematic, quantitative comparison of within-subjects' and between-species' laterality by focusing on the laterality of intraspecific gestures of chimpanzees (Pan troglodytes) and gorillas (Gorilla gorilla) living in six different captive groups...
June 7, 2017: Brain Research
https://www.readbyqxmd.com/read/28596056/development-and-initial-validation-of-a-sensory-threshold-examination-protocol-step-for-phenotyping-canine-pain-syndromes
#15
Sandra Sanchis-Mora, Yu-Mei Chang, Siobhan Abeyesinghe, Amy Fisher, Holger A Volk, Ludovic Pelligand
OBJECTIVE: To study the feasibility and test-retest repeatability of a sensory threshold examination protocol (STEP) and report the quantitative sensory threshold distributions in healthy dogs. STUDY DESIGN: Prospective, observational, cohort study. ANIMALS: Twenty-five healthy client-owned dogs. METHODS: Tactile sensitivity test (TST) (von Frey filaments), mechanical thresholds (MT with 2, 4 and 8 mm probes), heat thresholds (HT) and responsiveness to cold stimulus (CT at 0 °C) were quantitatively assessed for five body areas (BAs; tibias, humeri, neck, thoracolumbar region and abdomen) in a randomized order on three different occasions...
February 24, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28595241/stratifying-patients-with-peripheral-neuropathic-pain-based-on-sensory-profiles-algorithm-and-sample-size-recommendations
#16
Jan Vollert, Christoph Maier, Nadine Attal, David L H Bennett, Didier Bouhassira, Elena K Enax-Krumova, Nanna B Finnerup, Rainer Freynhagen, Janne Gierthmühlen, Maija Haanpää, Per Hansson, Philipp Hüllemann, Troels S Jensen, Walter Magerl, Juan D Ramirez, Andrew S C Rice, Sigrid Schuh-Hofer, Märta Segerdahl, Jordi Serra, Pallai R Shillo, Soeren Sindrup, Solomon Tesfaye, Andreas C Themistocleous, Thomas R Tölle, Rolf-Detlef Treede, Ralf Baron
In a recent cluster analysis, it has been shown that patients with peripheral neuropathic pain can be grouped into 3 sensory phenotypes based on quantitative sensory testing profiles, which are mainly characterized by either sensory loss, intact sensory function and mild thermal hyperalgesia and/or allodynia, or loss of thermal detection and mild mechanical hyperalgesia and/or allodynia. Here, we present an algorithm for allocation of individual patients to these subgroups. The algorithm is nondeterministic-ie, a patient can be sorted to more than one phenotype-and can separate patients with neuropathic pain from healthy subjects (sensitivity: 78%, specificity: 94%)...
June 7, 2017: Pain
https://www.readbyqxmd.com/read/28592857/effects-of-transcranial-direct-current-stimulation-on-temperature-and-pain-perception
#17
Laura Mordillo-Mateos, Michele Dileone, Vanesa Soto-León, Angela Brocalero-Camacho, Yolanda A Pérez-Borrego, Ana Onate-Figuerez, Juan Aguilar, Antonio Oliviero
Transcranial direct current stimulation modifies cortical excitability and in consequence some cerebral functions. In the present study we aimed to elucidate whether tDCS could affect temperature and pain perceptions in healthy subjects testing different stimulation parameters. A total of 20 healthy subjects were studied by means of quantitative sensory testing. Two different experiments were performed. First, we studied the effects of 15 minutes 2 mA anodal transcranial direct current stimulation applied over left M1 and parietal cortex in two separated sessions...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28590258/opioid-induced-hyperalgesia-in-clinical-anesthesia-practice-what-has-remained-from-theoretical-concepts-and-experimental-studies
#18
Lena Weber, David C Yeomans, Alexander Tzabazis
PURPOSE OF REVIEW: This article reviews the phenomenon of opioid-induced hyperalgesia (OIH) and its implications for clinical anesthesia. The goal of this review is to give an update on perioperative prevention and treatment strategies, based on findings in preclinical and clinical research. RECENT FINDINGS: Several systems have been suggested to be involved in the pathophysiology of OIH with a focus on the glutaminergic system. Very recently preclinical data revealed that peripheral μ-opioid receptors (MORs) are key players in the development of OIH and acute opioid tolerance (AOT)...
June 5, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28585431/sensory-quality-evaluation-for-appearance-of-needle-shaped-green-tea-based-on-computer-vision-and-nonlinear-tools
#19
Chun-Wang Dong, Hong-Kai Zhu, Jie-Wen Zhao, Yong-Wen Jiang, Hai-Bo Yuan, Quan-Sheng Chen
Tea is one of the three greatest beverages in the world. In China, green tea has the largest consumption, and needle-shaped green tea, such as Maofeng tea and Sparrow Tongue tea, accounts for more than 40% of green tea (Zhu et al., 2017). The appearance of green tea is one of the important indexes during the evaluation of green tea quality. Especially in market transactions, the price of tea is usually determined by its appearance (Zhou et al., 2012). Human sensory evaluation is usually conducted by experts, and is also easily affected by various factors such as light, experience, psychological and visual factors...
June 2017: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/28584273/antennal-and-abdominal-transcriptomes-reveal-chemosensory-gene-families-in-the-coconut-hispine-beetle-brontispa-longissima
#20
Shu-Ying Bin, Meng-Qiu Qu, Ke-Ming Li, Zheng-Qiang Peng, Zhong-Zhen Wu, Jin-Tian Lin
Antennal and abdominal transcriptomes of males and females of the coconut hispine beetle Brontispa longissima were sequenced to identify and compare the expression patterns of genes involved in odorant reception and detection. Representative proteins from the chemosensory gene families likely essential for insect olfaction were identified. These include 48 odorant receptors (ORs), 19 ionotropic receptors (IRs), 4 sensory neuron membrane proteins (SNMPs), 34 odorant binding proteins (OBPs) and 16 chemosensory proteins (CSPs)...
June 5, 2017: Scientific Reports
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