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https://www.readbyqxmd.com/read/28211587/histaminergic-and-non-histaminergic-elicited-itch-is-attenuated-in-capsaicin-evoked-areas-of-allodynia-and-hyperalgesia-a-healthy-volunteer-study
#1
H H Andersen, J Elberling, N Sharma, L E Hauberg, P Gazerani, L Arendt-Nielsen
BACKGROUND: Chronic pain patients with sensitization may exhibit decreased sensitivity to normally pruritogenic sensory stimuli and moreover occasionally perceive these as painful. This study explored the relationship between itch and pain, by evaluating histaminergic and non-histaminergic itch evoked in capsaicin-induced allodynic and hyperalgesic areas. METHODS: In 28 healthy volunteers, capsaicin (100 μg/0.1 mL) was injected intradermally in the volar forearm to establish secondary dysesthesias...
February 17, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28207508/concussion-mild-traumatic-brain-injury-related-chronic-pain-in-males-and-females-a-diagnostic-modelling-study
#2
Tatyana Mollayeva, J David Cassidy, Colin M Shapiro, Shirin Mollayeva, Angela Colantonio
Pain is an unpleasant, complex, and perceived experience that places a significant burden on patients and clinicians. Its severity may be mediated by emotion, attitude, and environmental influences, and pain may be expressed differently in males and females. Traumatic brain injury (TBI) is frequently associated with chronic pain. This diagnostic modeling study examined sex differences in the construct of chronic pain in patients with delayed recovery from concussion/mild traumatic brain injury (mTBI).Data were collected from standardized questionnaires, neuroimaging records, and comprehensive clinical assessments...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28207494/causes-and-consequences-of-fatigue-in-rheumatoid-arthritis
#3
Patricia Katz
PURPOSE OF REVIEW: To review current information on the causes, treatments, and consequences of fatigue in rheumatoid arthritis. RECENT FINDINGS: Disease activity (inflammation, pain, joint symptoms) is associated with greater fatigue. However, disease activity per se accounts for only a small portion of fatigue, and rheumatoid arthritis medications that reduce disease activity have small effects on fatigue. Instead, factors outside the direct effects of rheumatoid arthritis, such as obesity, physical inactivity, sleep disturbance, and depression, explain the majority of variation in fatigue...
February 15, 2017: Current Opinion in Rheumatology
https://www.readbyqxmd.com/read/28204956/centrally-targeted-pharmacotherapy-for-chronic-abdominal-pain-understanding-and-management
#4
Hans Törnblom, Douglas A Drossman
Chronic abdominal pain has a widespread impact on the individual and the society. Identifying and explaining mechanisms of importance for the pain experience within a biopsychosocial context are central in order to select treatment that has a chance for symptom reduction. With current knowledge of brain-gut interactions, chronic abdominal pain, which mostly appears in functional gastrointestinal disorders, to a large extent involves pain mechanisms residing within the brain. As such, the use of centrally targeted pharmacotherapy as an effective treatment option is obvious in a selected number of patients...
February 16, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28197544/plasticity-in-brainstem-mechanisms-of-pain-modulation-by-nicotinic-acetylcholine-receptors-in-the-rat
#5
Francis J Jareczek, Stephanie R White, Donna L Hammond
Individuals with chronic pain may be driven to smoke more because the analgesic efficacy of nicotine diminishes. To determine whether persistent pain diminishes the actions of a nicotinic acetylcholine receptor (nAChR) agonist in pain modulatory pathways, we examined the effects of epibatidine in the rostral ventromedial medulla (RVM) of rats with and without inflammatory injury induced by intraplantar injection of complete Freund's adjuvant (CFA). In uninjured rats, epibatidine produced a dose-dependent antinociception that was completely blocked by dihydro-β-erythroidine (DHβE; α4β2 antagonist) and partially blocked by methyllycaconitine (MLA; α7 antagonist)...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28196967/coxsackie-myocarditis-and-hepatitis-with-reactivated-epstein-bar-virus-ebv-a-case-report
#6
Varunsiri Atti, Nathan M Anderson, Mathew B Day
BACKGROUND Myocarditis, defined as inflammation of myocardial tissue of the heart, is an uncommon cardiac presentation and is due to a variety of causes. It affects 1% of the US population, 50% of which is caused by coxsackie B virus. Cardiac tissue is the prime target, and destruction of myocardium results in cardiac failure with fluid overload. CASE REPORT Our patient was a 57-year-old woman with fever, headache, neck pain, and generalized malaise. Her white blood cell count was 13×10³ cells/mm³. Interestingly, lumbar puncture ruled out meningitis...
February 15, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28196714/working-memory-load-modulates-the-neural-response-to-other-s-pain-evidence-from-an-erp-study
#7
Fang Cui, Xiangru Zhu, Yuejia Luo, Jiaping Cheng
The present study investigated the time course of processing other's pain under different conditions of working memory (WM) load. Event-related potentials (ERPs) were recorded while the participants held two digits (low WM load) or six digits (high WM load) in WM and viewed pictures that showed others who were in painful or non-painful situations. Robust WM-load × Picture interactions were found for the N2 and LPP components. In the high WM-load condition, painful pictures elicited significantly larger amplitudes than non-painful pictures...
February 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28196631/effects-of-12-weeks-of-chiropractic-care-on-central-integration-of-dual-somatosensory-input-in-chronic-pain-patients-a-preliminary-study
#8
Heidi Haavik, Imran Khan Niazi, Kelly Holt, Bernadette Murphy
OBJECTIVE: The purpose of this preliminary study was to assess whether the dual somatosensory evoked potential (SEP) technique is sensitive enough to measure changes in cortical intrinsic inhibitory interactions in patients with chronic neck or upper extremity pain and, if so, whether changes are associated with changes in pain scores. METHODS: The dual peripheral nerve stimulation SEP ratio technique was used for 6 subjects with a history of chronic neck or upper limb pain...
February 10, 2017: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/28195858/psychophysical-and-psychological-predictors-of-acute-pain-after-breast-surgery-differ-in-patients-with-and-without-pre-existing-chronic-pain
#9
Ruth Ruscheweyh, Anika Viehoff, Joke Tio, Esther M Pogatzki-Zahn
The prediction of acute postoperative pain would be of great clinical advantage but results of studies investigating possible predictors are inconsistent. Here, we studied the role of a wide variety of previously suggested predictors in 74 patients undergoing breast surgery. Preoperatively, patients filled out the Pain Sensitivity Questionnaire (PSQ) and a set of psychological questionnaires (the Beck Depression Inventory (BDI), State-Trait Anxiety Inventory (STAI), and Pain Catastrophizing Scale (PCS)) and participated in an experimental pain testing session, including assessment of conditioned pain modulation (CPM), temporal summation, and responses to heat, pinprick and pressure pain...
February 9, 2017: Pain
https://www.readbyqxmd.com/read/28195170/quantifying-cerebral-contributions-to-pain-beyond-nociception
#10
Choong-Wan Woo, Liane Schmidt, Anjali Krishnan, Marieke Jepma, Mathieu Roy, Martin A Lindquist, Lauren Y Atlas, Tor D Wager
Cerebral processes contribute to pain beyond the level of nociceptive input and mediate psychological and behavioural influences. However, cerebral contributions beyond nociception are not yet well characterized, leading to a predominant focus on nociception when studying pain and developing interventions. Here we use functional magnetic resonance imaging combined with machine learning to develop a multivariate pattern signature-termed the stimulus intensity independent pain signature-1 (SIIPS1)-that predicts pain above and beyond nociceptive input in four training data sets (Studies 1-4, N=137)...
February 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/28191712/ways-of-encoding-somatic-information-and-their-effects-on-retrospective-symptom-reporting
#11
Marta Walentynowicz, Ilse Van Diest, Filip Raes, Omer Van den Bergh
OBJECTIVES: Retrospective symptom reports tend to overestimate actual symptom intensity. This study explored how focusing on sensory-perceptual or on affective-motivational aspects of a somatic experience influenced retrospective symptom reports in high and low habitual symptom reporters (HSR). We hypothesized that a focus on affective-motivational aspects of somatic episodes contributes to retrospective overestimation compared to a focus on sensory-perceptual aspects. DESIGN: Dyspnoea (rebreathing) and pain (cold pain) were induced during two experimental sessions in healthy women: 21 high and 24 low HSR, selected using cut-off scores on a symptom checklist...
February 13, 2017: British Journal of Health Psychology
https://www.readbyqxmd.com/read/28190430/delirium-in-critically-ill-patients
#12
A J C Slooter, R R Van De Leur, I J Zaal
Delirium is common in critically ill patients and associated with increased length of stay in the intensive care unit (ICU) and long-term cognitive impairment. The pathophysiology of delirium has been explained by neuroinflammation, an aberrant stress response, neurotransmitter imbalances, and neuronal network alterations. Delirium develops mostly in vulnerable patients (e.g., elderly and cognitively impaired) in the throes of a critical illness. Delirium is by definition due to an underlying condition and can be identified at ICU admission using prediction models...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28190409/child-perfectionism-and-its-relationship-with-personality-excessive-parental-demands-depressive-symptoms-and-experience-of-positive-emotions
#13
Laura B Oros, Ornella Iuorno, Mónica Serppe
While adaptive perfectionism ensures good overall performance, maladaptive perfectionism is associated with emotional disorders for which psychological treatment is sought. There are many factors that can explain the development of this disorder throughout childhood. The present study analyzed to what extent the child's personality traits and excessive parental demands can predict maladaptive perfectionism, and, in turn, also analyzed how this relates to positive emotions and depressive symptoms in a sample of 404 Argentinian children (M age = 10...
February 13, 2017: Spanish Journal of Psychology
https://www.readbyqxmd.com/read/28188357/analgesic-antiallodynic-and-anticonvulsant-activity-of-novel-hybrid-molecules-derived-from-n-benzyl-2-2-5-dioxopyrrolidin-1-yl-propanamide-and-2-2-5-dioxopyrrolidin-1-yl-butanamide-in-animal-models-of-pain-and-epilepsy
#14
Anna Rapacz, Krzysztof Kamiński, Jolanta Obniska, Paulina Koczurkiewicz, Elżbieta Pękala, Barbara Filipek
The purpose of the present study was to examine the analgesic activity of six novel hybrid molecules, which demonstrated in the previous research anticonvulsant activity in the maximal electroshock seizure (MES) and subcutaneous pentylenetetrazole seizure (scPTZ) tests in mice. The antinociceptive properties were estimated in three models of pain in mice-the hot plate test, the formalin test, and in the oxaliplatin-induced neuropathy. Moreover, extended anticonvulsant studies were carried out and the antiseizure activity was investigated in the 6-Hz test...
February 10, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28187765/does-a-lack-of-physical-activity-explain-the-rheumatoid-arthritis-lipid-profile
#15
Hiba AbouAssi, Margery A Connelly, Lori A Bateman, K Noelle Tune, Janet L Huebner, Virginia B Kraus, Deborah A Winegar, James D Otvos, William E Kraus, Kim M Huffman
BACKGROUND: In rheumatoid arthritis (RA), cardiovascular risk is associated with paradoxical reductions in total cholesterol, low density lipoprotein-cholesterol (LDL-C), and high density lipoprotein-cholesterol (HDL-C). Concentrations of small LDL (LDL-P) and HDL (HDL-P) particles are also reduced with increased inflammation and disease activity in RA patients. Here we sought to identify which measure(s) of inflammation, disease activity and cardiometabolic risk contribute most to the RA-associated lipoprotein profile...
February 10, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28185596/why-do-men-go-to-the-doctor-socio-demographic-and-lifestyle-factors-associated-with-healthcare-utilisation-among-a-cohort-of-australian-men
#16
Marisa Schlichthorst, Lena A Sanci, Jane Pirkis, Matthew J Spittal, Jane S Hocking
BACKGROUND: Men use health services less often than women and frequently delay seeking help even if experiencing serious health problems. This may put men at higher risk for developing serious health problems which, in part, may explain men's higher rates of some serious illnesses and shorter life span relative to women. This paper identifies factors that contribute to health care utilisation in a cohort of Australian men by exploring associations between socio-economic, health and lifestyle factors and the use of general practitioner (GP) services...
October 31, 2016: BMC Public Health
https://www.readbyqxmd.com/read/28183297/the-relationship-between-pain-with-walking-and-self-rated-health-12%C3%A2-months-following-total-knee-arthroplasty-a-longitudinal-study
#17
Maren Falch Lindberg, Tone Rustøen, Christine Miaskowski, Leiv Arne Rosseland, Anners Lerdal
BACKGROUND: A subgroup of patients continue to report pain with walking 12 months after total knee arthroplasty (TKA). The association between walking pain and self-rated health (SRH) after TKA is not known. This prospective longitudinal study aimed to investigate the association between a comprehensive list of preoperative factors, postoperative pain with walking, and SRH 12 months after TKA. METHODS: Patients (N = 156) scheduled for TKA completed questionnaires that evaluated demographic and clinical characteristics, symptoms, psychological factors, and SRH...
February 10, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28181946/case-report-of-midazolam-withdrawal-induced-catatonia-in-a-9-year-old-patient
#18
Cassandra R Duncan-Azadi, Peter N Johnson, Andrew Gormley
Benzodiazepine withdrawal-induced catatonia is a rare phenomenon in the adult population and has never been reported in a pediatric patient. We present a 9-year-old boy who exhibited catatonia symptoms following discontinuation of a midazolam infusion in the pediatric intensive care unit. The pediatric anesthesia acute pain team was consulted. When the patient's altered mental status could not otherwise be explained, benzodiazepine withdrawal-induced catatonia was considered. A dose of 2 mg intravenous lorazepam was given and the patient's symptoms dramatically improved within 5 minutes of administration...
February 8, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28171710/clinical-outcomes-and-survival-surrogacy-studies-of-prostate-specific-antigen-declines-following-enzalutamide-in-men-with-metastatic-castration-resistant-prostate-cancer-previously-treated-with-docetaxel
#19
Andrew J Armstrong, Fred Saad, De Phung, Carl Dmuchowski, Neal D Shore, Karim Fizazi, Mohammad Hirmand, David Forer, Howard I Scher, Johann De Bono
BACKGROUND: In the AFFIRM trial, enzalutamide significantly increased overall survival (OS) for men with metastatic castration-resistant prostate cancer (mCRPC) after chemotherapy versus placebo and significantly decreased prostate-specific antigen (PSA) levels. The goal of this post hoc analysis was to associate levels of PSA decline from baseline after enzalutamide with clinical outcomes in the postchemotherapy mCRPC setting. METHODS: Men in the AFFIRM trial (n = 1199) were grouped by maximal PSA decline in the first 90 days of treatment...
February 7, 2017: Cancer
https://www.readbyqxmd.com/read/28169425/analgesia-induced-by-self-initiated-electrotactile-sensation-is-mediated-by-top-down-modulations
#20
Ke Zhao, Zhengyu Tang, Huiquan Wang, Yifei Guo, Weiwei Peng, Li Hu
It is well known that sensory perception can be attenuated when sensory stimuli are controlled by self-initiated actions. This phenomenon is explained by the consistency between forward models of anticipated action effects and actual sensory feedback. Specifically, the brain state related to the binding between motor processing and sensory perception would have inhibitory function by gating sensory information via top-down control. Since the brain state could casually influence the perception of subsequent stimuli of different sensory modalities, we hypothesize that pain evoked by nociceptive stimuli following the self-initiated tactile stimulation would be attenuated as compared to that following externally determined tactile stimulation...
February 7, 2017: Psychophysiology
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