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https://www.readbyqxmd.com/read/27919772/pain-anxiety-and-its-association-with-pain-congruence-trajectories-during-the-cold-pressor-task
#1
S M Clark, A Cano, L Goubert, J W S Vlaeyen, L H Wurm, A M Corley
: Incongruence of pain severity ratings among people experiencing pain and their observers has been linked to psychological distress. Previous studies have measured pain rating congruence through static self-report, involving a single rating of pain; however, this method does not capture changes in ratings over time. The present study examined the extent to which partners were congruent on multiple ratings of a participants' pain severity during the cold pressor task. Furthermore, two components of pain anxiety-pain catastrophizing and perceived threat-were examined as predictors of pain congruence...
December 2, 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/27909401/implicit-learning-in-transient-global-amnesia-and-the-role-of-stress
#2
Frauke Nees, Martin Griebe, Anne Ebert, Michaela Ruttorf, Benjamin Gerber, Oliver T Wolf, Lothar R Schad, Achim Gass, Kristina Szabo
Transient global amnesia (TGA) is a disorder with reversible anterograde disturbance of explicit memory, frequently preceded by an emotionally or physically stressful event. By using magnetic resonance imaging (MRI) following an episode of TGA, small hippocampal lesions have been observed. Hence it has been postulated that the disorder is caused by the stress-related transient inhibition of memory formation in the hippocampus. In experimental studies, stress has been shown to affect both explicit and implicit learning-the latter defined as learning and memory processes that lack conscious awareness of the information acquired...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27908838/pain-related-rumination-but-not-magnification-or-helplessness-mediates-race-and-sex-differences-in-experimental-pain
#3
Samantha M Meints, Madison Stout, Samuel Abplanalp, Adam T Hirsh
: Compared to White individuals and men, Black individuals and women demonstrate a lower tolerance for experimental pain stimuli. Previous studies suggest that pain catastrophizing is important in this context, but little is known about which components of catastrophizing contribute to these race and sex differences. The purpose of the current study was to examine the individual components of catastrophizing (rumination, magnification, and helplessness) as candidate mediators of race and sex differences in experimental pain tolerance...
November 28, 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/27898457/ethnicity-cortisol-and-experimental-pain-responses-among-persons-with-symptomatic-knee-osteoarthritis
#4
Matthew S Herbert, Burel R Goodin, Hailey W Bulls, Adriana Sotolongo, Megan E Petrov, Jeffrey C Edberg, Laurence A Bradley, Roger B Fillingim
OBJECTIVES: While several factors are known to contribute to ethnic differences in pain, relatively little attention has been devoted to physiological factors. Our first aim was to examine the relationship between cortisol and pain responses during a cold-pressor task (CPT) among African American (AA) and non-Hispanic White (NHW) adults with knee osteoarthritis (OA). Our second aim was to assess the relationship between perceived racial discrimination and cortisol among AA participants...
November 28, 2016: Clinical Journal of Pain
https://www.readbyqxmd.com/read/27895193/organum-vasculosum-of-the-lamina-terminalis-detects-nacl-to-elevate-sympathetic-nerve-activity-and-blood-pressure
#5
Brian J Kinsman, Sarah S Simmonds, Kirsteen N Browning, Sean D Stocker
High-salt diet elevates NaCl concentrations in the cerebrospinal fluid to increase sympathetic nerve activity (SNA) in salt-sensitive hypertension. The organum vasculosum of the lamina terminalis (OVLT) resides along the rostral wall of the third ventricle, lacks a complete blood-brain barrier, and plays a pivotal role in body fluid homeostasis. Therefore, the present study used a multifaceted approach to examine whether OVLT neurons of Sprague-Dawley rats are intrinsically sensitive to changes in extracellular NaCl concentrations and mediate the sympathoexcitatory responses to central NaCl loading...
November 28, 2016: Hypertension
https://www.readbyqxmd.com/read/27892849/the-impact-of-acute-stress-on-cognitive-functioning-a-matter-of-cognitive-demands
#6
Thomas Plieger, Andrea Felten, Elena Diks, Jessica Tepel, Melanie Mies, Martin Reuter
INTRODUCTION: There is a controversy in the literature whether stress and related cortisol responses are beneficial or impairing for cognitive functioning. Conflicting results might be due to individual differences in stress reactivity and cognitive load of the applied tasks. METHODS: N = 48 participants underwent the Socially Evaluated Cold Pressor Test and were confronted with the Frankfurter Aufmerksamkeits-Inventar-2 (FAIR-2) which is a low-load attention task and two subscales of the Intelligenz-Struktur-Test 2000 R (I-S-T 2000R) as a high-load reasoning task before and after the stressor...
November 28, 2016: Cognitive Neuropsychiatry
https://www.readbyqxmd.com/read/27888135/antihypertensive-effects-of-androgens-in-conscious-spontaneously-hypertensive-rats
#7
Mercedes Perusquía, Nieves Herrera, Mercedes Ferrer, John N Stallone
Androgens are vasoactive steroids that induce acute vasodilation in a number of isolated vascular beds from different species, but the effects of these hormones on systemic blood pressure (BP) have been studied little. Although it has been reported that androgens exert systemic hypotensive effects through peripheral vasodilation in normotensive rats, there have not been any reports of systemic hypotensive effects of androgens in animals with hypertension. This study was designed to evaluate the acute effects of testosterone (TES) and its 5-reduced metabolites on systemic BP in hypertensive rats and to test the hypothesis that hypotestosteronemia may be involved in the pathogenesis of hypertension...
November 23, 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27884690/conditioned-pain-modulation-and-pressure-pain-sensitivity-in-the-adult-danish-general-population-the-danfund-study
#8
S Skovbjerg, T Jørgensen, L Arendt-Nielsen, J F Ebstrup, T Carstensen, T Graven-Nielsen
: Increased pressure pain sensitivity and impaired descending pain control have been associated with chronic pain, but knowledge on the variability in the adult general population is lacking. Pressure pain thresholds (PPTs) and descending pain control as assessed by conditioning pain modulation (CPM) were recorded in a randomly selected sample (n=2199, 53% females) of the Danish adult general population aged 18-70 years. PPTs were recorded over the tibialis anterior muscle and the upper trapezius muscle...
November 21, 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/27872976/development-and-validation-of-a-scoring-system-to-predict-surgical-site-infection-after-ventral-hernia-repair-a-michigan-surgical-quality-collaborative-study
#9
Efstathios Karamanos, Pridvi Kandagatla, Jenna Watson, Nathan Schmoekel, Aamir Siddiqui
INTRODUCTION: Surgical site infections (SSIs) are a rare but significant complication following an elective ventral hernia repair. This study aims to develop a risk assessment tool in order to predict the risk of developing SSIs postoperatively. METHODS: All patients undergoing an elective ventral hernia repair were identified using the Michigan Surgical Quality Collaborative (MSQC) database. Patients' demographics, comorbidities and technical aspects of the operations were extracted...
November 21, 2016: World Journal of Surgery
https://www.readbyqxmd.com/read/27867438/total-sleep-deprivation-and-pain-perception-during-cold-noxious-stimuli-in-humans
#10
Robert A Larson, Jason R Carter
BACKGROUND AND AIMS: A substantial portion of the population suffers from chronic pain leading to significant health care costs and lost productivity. Loss of sleep duration and quality are widely reported in patients suffering from a variety of acute or chronic pain conditions. Conversely, sleep loss has been known to elevate pain perception; thus a potential bi-directional relationship exists between sleep deprivation and pain. To date, the majority of studies examining the relationship between experimentally induced pain and sleep loss have focused on the measurement of pain threshold...
October 2016: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/27865949/lost-in-translation-the-potential-psychobiotic-lactobacillus-rhamnosus-jb-1-fails-to-modulate-stress-or-cognitive-performance-in-healthy-male-subjects
#11
John R Kelly, Andrew P Allen, Andriy Temko, William Hutch, Paul J Kennedy, Niloufar Farid, Eileen Murphy, Geraldine Boylan, John Bienenstock, John F Cryan, Gerard Clarke, Timothy G Dinan
BACKGROUND: Preclinical studies have identified certain probiotics as psychobiotics - live microorganisms with a potential mental health benefit. Lactobacillus rhamnosus (JB-1) has been shown to reduce stress-related behaviour, corticosterone release and alter central expression of GABA receptors in an anxious mouse strain. However, it is unclear if this single putative psychobiotic strain has psychotropic activity in humans. Consequently, we aimed to examine if these promising preclinical findings could be translated to healthy human volunteers...
November 16, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27865628/the-genesis-and-presentation-of-anxiety-in-disorders-of-autonomic-overexcitation
#12
Andrew P Owens, David A Low, Valeria Iodice, Hugo D Critchley, Christopher J Mathias
INTRODUCTION: We investigated the genesis and presentation of previously-reported anxiety in disorders of autonomic overexcitation in relation to interoception, body vigilance and trauma to test our hypothesis that patients with the postural tachycardia syndrome (PoTS), vasovagal syncope (VVS) and essential hyperhidrosis (EH) represent atypical anxiety phenotypes in whom affective symptoms are more related to apprehension and vigilance of physiological (interoceptive) feedback than neurotic or trauma-related factors...
October 19, 2016: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/27862179/the-use-of-a-battery-of-pain-models-to-detect-analgesic-properties-of-compounds-a-two-part-four-way-crossover-study
#13
P Okkerse, G van Amerongen, M L de Kam, J Stevens, R P Butt, R Gurrell, A Dahan, J M van Gerven, J L Hay, G J Groeneveld
AIM: The aim was to investigate the ability of a battery of pain models to detect analgesic properties of commonly used analgesics in healthy subjects. METHODS: The battery consisted of tests eliciting electrical, mechanical and thermal (contact heat and cold pressor)-pain and included a UVB model, the thermal grill illusion and a paradigm of conditioned pain modulation. Subjects were administered fentanyl 3 µg/kg, phenytoin 300 mg, (S)-ketamine 10 mg and placebo (part I), or imipramine 100 mg, pregabalin 300 mg, ibuprofen 600 mg and placebo (part II)...
November 9, 2016: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/27849115/blood-pressure-response-to-isometric-handgrip-testing-and-aerobic-capacity-and-associations-with-sprint-performance-in-middle-aged-men-following-high-intensity-interval-training
#14
Ryszard Zarzeczny, Cyprian Tomza, Anna Polak, Agnieszka Nawrat-Szołtysik
BACKGROUND: Of this study were to determine if a 6-week high-intensity interval training (HIIT) protocol with increasing exercise volume affects aerobic capacity and arterial blood pressure (BP) measured during a fatiguing isometric handgrip test (IHT) in middle-aged, normotensive men and to assess whether sprint performance is associated with training-induced changes in BP. METHODS: Fourteen recreationally active men (age 43.0 ± 0.9 years, body mass 74.4 ± 2...
November 16, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27828668/symptoms-of-anxiety-and-depression-are-related-to-cardiovascular-responses-to-active-but-not-passive-coping-tasks
#15
Kornanong Yuenyongchaiwat, Ian S Baker, David Sheffield
Objective: Anxiety and depression have been linked to blunted blood pressure (BP) and heart rate (HR) reactions to mental stress tests; however, most studies have not included indices of underlying hemodynamics nor multiple stress tasks. This study sought to examine the relationships of anxiety and depression with hemodynamic responses to acute active and passive coping tasks. Methods: A total of 104 participants completed the Hospital Anxiety and Depression Scales and mental arithmetic, speech, and cold pressor tasks while BP, HR, total peripheral resistance, and cardiac output (CO) were assessed...
November 7, 2016: Revista Brasileira de Psiquiatria
https://www.readbyqxmd.com/read/27826711/safety-of-enalapril-in-infants-admitted-to-the-neonatal-intensive-care-unit
#16
Lawrence C Ku, Kanecia Zimmerman, Daniel K Benjamin, Reese H Clark, Christoph P Hornik, P Brian Smith
Enalapril is used to treat hypertension and congestive heart failure in infants. However, enalapril is not labeled for neonates, and safety data in infants are sparse. To evaluate the safety of enalapril in young infants, we conducted a retrospective cohort study of infants who were exposed to enalapril in the first 120 days of life and were cared for in 348 neonatal intensive care units from 1997 to 2012. We determined the proportion of exposed infants who developed adverse events, including death, hypotension requiring pressors, hyperkalemia, and elevated serum creatinine...
November 8, 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27802438/bradykinin-contributes-to-sympathetic-and-pressor-responses-evoked-by-activation-of-skeletal-muscle-afferents-p2x-in-heart-failure
#17
Jihong Xing, Jianhua Li
BACKGROUND/AIMS: Published data suggest that purinergic P2X receptors of muscle afferent nerves contribute to the enhanced sympathetic nervous activity (SNA) and blood pressure (BP) responses during static exercise in heart failure (HF). In this study, we examined engagement of bradykinin (BK) in regulating responses of SNA and BP evoked by P2X stimulation in rats with HF. We further examined cellular mechanisms responsible for BK. We hypothesized that BK potentiates P2X currents of muscle dorsal root ganglion (DRG) neurons, and this effect is greater in HF due to upregulation of BK kinin B2 and P2X3 receptor...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27801892/bifidobacterium-longum-1714-as-a-translational-psychobiotic-modulation-of-stress-electrophysiology-and-neurocognition-in-healthy-volunteers
#18
A P Allen, W Hutch, Y E Borre, P J Kennedy, A Temko, G Boylan, E Murphy, J F Cryan, T G Dinan, G Clarke
The emerging concept of psychobiotics-live microorganisms with a potential mental health benefit-represents a novel approach for the management of stress-related conditions. The majority of studies have focused on animal models. Recent preclinical studies have identified the B. longum 1714 strain as a putative psychobiotic with an impact on stress-related behaviors, physiology and cognitive performance. Whether such preclinical effects could be translated to healthy human volunteers remains unknown. We tested whether psychobiotic consumption could affect the stress response, cognition and brain activity patterns...
November 1, 2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27798354/low-frequency-stimulation-of-group-iii-and-iv-hind-limb-afferents-evokes-reflex-pressor-responses-in-decerebrate-rats
#19
Jonathan E Harms, Steven W Copp, Marc P Kaufman
Contraction of freely perfused hind limb muscles in decerebrate rats evokes the exercise pressor reflex, resulting in sympathetic activation and increased blood pressure. This reflex is propagated along mechanically sensitive group III and metabolically sensitive group IV afferent nerve fibers. Recent research by our laboratory has focused on the exaggeration of the exercise pressor reflex in decerebrate rats with simulated peripheral artery disease, which was induced by ligating the femoral artery for 72 h before the start of the experiment...
October 2016: Physiological Reports
https://www.readbyqxmd.com/read/27791019/central-role-for-melanocortin-4-receptors-in-offspring-hypertension-arising-from-maternal-obesity
#20
Anne-Maj S Samuelsson, Amandine Mullier, Nuria Maicas, Nynke R Oosterhuis, Sung Eun Bae, Tatiana V Novoselova, Li F Chan, Joaquim M Pombo, Paul D Taylor, Jaap A Joles, Clive W Coen, Nina Balthasar, Lucilla Poston
Melanocortin-4 receptor (Mc4r)-expressing neurons in the autonomic nervous system, particularly in the paraventricular nucleus of the hypothalamus (PVH), play an essential role in blood pressure (BP) control. Mc4r-deficient (Mc4rKO) mice are severely obese but lack obesity-related hypertension; they also show a reduced pressor response to salt loading. We have previously reported that lean juvenile offspring born to diet-induced obese rats (OffOb) exhibit sympathetic-mediated hypertension, and we proposed a role for postnatally raised leptin in its etiology...
October 25, 2016: Proceedings of the National Academy of Sciences of the United States of America
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