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pain neurobiology

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https://www.readbyqxmd.com/read/29774244/classification-and-characterisation-of-brain-network-changes-in-chronic-back-pain-a-multicenter-study
#1
Hiroaki Mano, Gopal Kotecha, Kenji Leibnitz, Takashi Matsubara, Aya Nakae, Nicholas Shenker, Masahiko Shibata, Valerie Voon, Wako Yoshida, Michael Lee, Toshio Yanagida, Mitsuo Kawato, Maria Joao Rosa, Ben Seymour
Background. Chronic pain is a common, often disabling condition thought to involve a combination of peripheral and central neurobiological factors. However, the extent and nature of changes in the brain is poorly understood. Methods. We investigated brain network architecture using resting-state fMRI data in chronic back pain patients in the UK and Japan (41 patients, 56 controls), as well as open data from USA. We applied machine learning and deep learning (conditional variational autoencoder architecture) methods to explore classification of patients/controls based on network connectivity...
2018: Wellcome Open Research
https://www.readbyqxmd.com/read/29755928/the-effects-of-social-support-on-strenuous-physical-exercise
#2
Arran Davis, Emma Cohen
In humans, socio-environmental cues play an important role in determining adaptive psychophysiological states and behaviours. In sport and exercise, cues to cohesive groups and close, supportive relationships are ubiquitous, possibly because of their effects on neurobiological mechanisms underlying physical performance. Clinical research has shown that the presence of supportive others can lead to reductions in perceptions of pain, while research from sport and exercise science has shown that pain and physical fatigue occupy ranges on a single spectrum of physical discomfort, which works to regulate outputs during strenuous physical exertion...
2018: Adaptive Human Behavior and Physiology
https://www.readbyqxmd.com/read/29725317/psychopathy-to-altruism-neurobiology-of-the-selfish-selfless-spectrum
#3
REVIEW
James W H Sonne, Don M Gash
The age-old philosophical, biological, and social debate over the basic nature of humans as being "universally selfish" or "universally good" continues today highlighting sharply divergent views of natural social order. Here we analyze advances in biology, genetics and neuroscience increasing our understanding of the evolution, features and neurocircuitry of the human brain underlying behavior in the selfish-selfless spectrum. First, we examine evolutionary pressures for selection of altruistic traits in species with protracted periods of dependence on parents and communities for subsistence and acquisition of learned behaviors...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29697476/a-systematic-review-of-the-processes-underlying-the-main-and-the-buffering-effect-of-social-support-on-the-experience-of-pain
#4
Xianwei Che, Robin Cash, Sin Ki Ng, Paul Fitzgerald, Bernadette M Fitzgibbon
OBJECTIVE: This review aimed to explore the processes that underlie the main and the buffering effect of social support on decreased pain experience. METHODS: The systematic review was conducted according to the PRISMA guidelines. Online databases of PubMed and PsycINFO were searched for peer-reviewed articles using keywords (("social support", OR "interpersonal", OR "social presence", OR "spouse", OR "couple", OR "marriage") AND "pain")...
April 24, 2018: Clinical Journal of Pain
https://www.readbyqxmd.com/read/29694918/psychosocial-stress-delays-recovery-of-postoperative-pain-following-incisional-surgery-in-the-rat
#5
Vipin Arora, Thomas J Martin, Carol A Aschenbrenner, Kenichiro Hayashida, Susy A Kim, Renee A Parker, James C Eisenach, Christopher M Peters
Psychosocial factors such as anxiety, depression and catastrophizing, commonly associated with established chronic pain, also may be associated with an increased risk of chronic postsurgical pain (CPSP) when present preoperatively. We used a repeat social defeat (RSD) paradigm to induce psychosocial stress in rodents prior to incisional surgery of the paw. Mixed effects growth curve models were utilized to examine resolution of mechanical hypersensitivity in rats for four weeks following surgery. Eight days following surgery, immunohistochemistry was conducted to examine glial activation as well as evoked neuronal activation in the spinal cord...
April 22, 2018: Neuroscience
https://www.readbyqxmd.com/read/29670003/stress-and-alterations-in-the-pain-matrix-a-biopsychosocial-perspective-on-back-pain-and-its-prevention-and-treatment
#6
Pia-Maria Wippert, Christine Wiebking
The genesis of chronic pain is explained by a biopsychosocial model. It hypothesizes an interdependency between environmental and genetic factors provoking aberrant long-term changes in biological and psychological regulatory systems. Physiological effects of psychological and physical stressors may play a crucial role in these maladaptive processes. Specifically, long-term demands on the stress response system may moderate central pain processing and influence descending serotonergic and noradrenergic signals from the brainstem, regulating nociceptive processing at the spinal level...
April 18, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29649948/women-s-sexual-dysfunction-associated-with-psychiatric-disorders-and-their-treatment
#7
Rosemary Basson, Thea Gilks
Impairment of mental health is the most important risk factor for female sexual dysfunction. Women living with psychiatric illness, despite their frequent sexual difficulties, consider sexuality to be an important aspect of their quality of life. Antidepressant and antipsychotic medication, the neurobiology and symptoms of the illness, past trauma, difficulties in establishing relationships and stigmatization can all contribute to sexual dysfunction. Low sexual desire is strongly linked to depression. Lack of subjective arousal and pleasure are linked to trait anxiety: the sensations of physical sexual arousal may lead to fear rather than to pleasure...
January 2018: Women's Health
https://www.readbyqxmd.com/read/29589782/immediate-preoperative-outcomes-of-pain-neuroscience-education-for-patients-undergoing-total-knee-arthroplasty-a-case-series
#8
Adriaan Louw, Kory Zimney, Jordan Reed, Merrill Landers, Emilio J Puentedura
BACKGROUND: Standard preoperative education for total knee arthroplasty (TKA) has been shown to have no effect on postoperative outcomes. This may be because such education programs fail to educate patients about pain. Pain neuroscience education (PNE) focuses on teaching people more about pain from a neurobiological and neurophysiological perspective. DESIGN AND SETTING: Case Series. AIM: To determine the immediate effects, if any, of providing PNE before TKA surgery on patient self-report measures...
March 28, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29561359/title-comparative-transcriptome-profiling-of-the-human-and-mouse-dorsal-root-ganglia-an-rna-seq-based-resource-for-pain-and-sensory-neuroscience-research
#9
Pradipta Ray, Andrew Torck, Lilyana Quigley, Andi Wangzhou, Matthew Neiman, Chandranshu Rao, Tiffany Lam, Ji-Young Kim, Tae Hoon Kim, Michael Q Zhang, Gregory Dussor, Theodore J Price
Molecular neurobiological insight into human nervous tissues is needed to generate next generation therapeutics for neurological disorders like chronic pain. We obtained human Dorsal Root Ganglia (DRG) samples from organ donors and performed RNA-sequencing (RNA-seq) to study the human DRG (hDRG) transcriptional landscape, systematically comparing it with publicly available data from a variety of human and orthologous mouse tissues, including mouse DRG (mDRG). We characterized the hDRG transcriptional profile in terms of tissue-restricted gene co-expression patterns and putative transcriptional regulators, and formulated an information-theoretic framework to quantify DRG enrichment...
March 20, 2018: Pain
https://www.readbyqxmd.com/read/29525437/pathophysiology-of-endometriosis-associated-pain-a-review-of-pelvic-and-central-nervous-system-mechanisms
#10
REVIEW
Lydia Coxon, Andrew W Horne, Katy Vincent
Although pain is one of the main symptoms women with endometriosis present with, there is poor correlation between symptom severity and disease burden and the underlying biological mechanisms by which pain arises are still only poorly understood. We briefly review the neurobiology of pain before considering mechanisms that may be specifically relevant in the context of endometriosis. The role of pelvic factors such as new nerve fibre growth, peritoneal fluid and inflammation is explored with a particular focus on studies where these factors have been associated with pain symptoms rather than just being compared between women with endometriosis and disease-free controls...
February 15, 2018: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29523342/migraine
#11
REVIEW
David W Dodick
Migraine is a chronic paroxysmal neurological disorder characterised by multiphase attacks of head pain and a myriad of neurological symptoms. The underlying genetic and biological underpinnings and neural networks involved are coming sharply into focus. This progress in the fundamental understanding of migraine has led to novel, mechanism-based and disease-specific therapeutics. In this Seminar, the clinical features and neurobiology of migraine are reviewed, evidence to support available treatment options is provided, and emerging drug, device, and biological therapies are discussed...
March 31, 2018: Lancet
https://www.readbyqxmd.com/read/29497363/parathyroid-hormone-related-peptide-elicits-peripheral-trpv1-dependent-mechanical-hypersensitivity
#12
Andrew J Shepherd, Aaron D Mickle, Suraj Kadunganattil, Hongzhen Hu, Durga P Mohapatra
Bone metastasis in breast, prostate and lung cancers often leads to chronic pain, which is poorly managed by existing analgesics. The neurobiological mechanisms that underlie chronic pain associated with bone-metastasized cancers are not well understood, but sensitization of peripheral nociceptors by tumor microenvironment factors has been demonstrated to be important. Parathyroid hormone-related peptide (PTHrP) is highly expressed in bone-metastasized breast and prostate cancers, and is critical to growth and proliferation of these tumors in the bone tumor microenvironment...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29476771/subliminal-latent-processing-of-pain-and-its-evolution-to-conscious-awareness
#13
REVIEW
David Borsook, Andrew M Youssef, Nadia Barakat, Christine B Sieberg, Igor Elman
By unconscious or covert processing of pain we refer to nascent interactions that affect the eventual deliverance of pain awareness. Thus, internal processes (viz., repeated nociceptive events, inflammatory kindling, reorganization of brain networks, genetic) or external processes (viz., environment, socioeconomic levels, modulation of epigenetic status) contribute to enhancing or inhibiting the presentation of pain awareness. Here we put forward the notion that for many patients, ongoing sub-conscious changes in brain function are significant players in the eventual manifestation of chronic pain...
May 2018: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29464530/difference-in-regional-neural-fluctuations-and-functional-connectivity-in-crohn-s-disease-a-resting-state-functional-mri-study
#14
Chunhui Bao, Peng Liu, Huirong Liu, Xiaoming Jin, Yin Shi, Luyi Wu, Xiaoqing Zeng, Jianye Zhang, Di Wang, Vince D Calhoun, Jie Tian, Huangan Wu
Patients with Crohn's disease (CD) are shown to have abnormal changes in brain structures. This study aimed to further investigate whether these patients have abnormal brain activities and network connectivity. Sixty patients with CD and 40 healthy controls (HCs) underwent resting-state functional magnetic resonance imaging (fMRI) scans. Amplitude of low-frequency fluctuation (ALFF) and seed-based functional connectivity (FC) were used to assess differences in spontaneous regional brain activity and functional connectivity...
February 20, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29463441/perineal-ultrasound-a-review-in-the-context-of-ejaculatory-dysfunction
#15
REVIEW
Connor M Forbes, Ryan Flannigan, Darius A Paduch
BACKGROUND: Ejaculation consists of the emission of semen from seminal vesicles and prostate, followed by expulsion. Ejaculatory dysfunction may take several forms including premature ejaculation, delayed or anejaculation, retrograde ejaculation, and painful ejaculation. Ejaculation is what we can see whereas orgasm is what we feel. The presence of ejaculate does not indicate the ability to experience orgasm. Hence, for the purpose of this work we consider orgasm and ejaculation as 2 separate neurobiological phenomena...
February 17, 2018: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/29460355/do-hostile-school-environments-promote-social-deviance-by-shaping-neural-responses-to-social-exclusion
#16
Roberta A Schriber, Christina R Rogers, Emilio Ferrer, Rand D Conger, Richard W Robins, Paul D Hastings, Amanda E Guyer
The present study examined adolescents' neural responses to social exclusion as a mediator of past exposure to a hostile school environment (HSE) and later social deviance, and whether family connectedness buffered these associations. Participants (166 Mexican-origin adolescents, 54.4% female) reported on their HSE exposure and family connectedness across Grades 9-11. Six months later, neural responses to social exclusion were measured. Finally, social deviance was self-reported in Grades 9 and 12. The HSE-social deviance link was mediated by greater reactivity to social deviance in subgenual anterior cingulate cortex, a region from the social pain network also implicated in social susceptibility...
March 2018: Journal of Research on Adolescence: the Official Journal of the Society for Research on Adolescence
https://www.readbyqxmd.com/read/29444090/identification-of-fam173b-as-a-protein-methyltransferase-promoting-chronic-pain
#17
Hanneke L D M Willemen, Annemieke Kavelaars, Judith Prado, Mirjam Maas, Sabine Versteeg, Lara J J Nellissen, Jeshua Tromp, Rafael Gonzalez Cano, Wenjun Zhou, Magnus E Jakobsson, Jędrzej Małecki, George Posthuma, Abdella M Habib, Cobi J Heijnen, Pål Ø Falnes, Niels Eijkelkamp
Chronic pain is a debilitating problem, and insights in the neurobiology of chronic pain are needed for the development of novel pain therapies. A genome-wide association study implicated the 5p15.2 region in chronic widespread pain. This region includes the coding region for FAM173B, a functionally uncharacterized protein. We demonstrate here that FAM173B is a mitochondrial lysine methyltransferase that promotes chronic pain. Knockdown and sensory neuron overexpression strategies showed that FAM173B is involved in persistent inflammatory and neuropathic pain via a pathway dependent on its methyltransferase activity...
February 2018: PLoS Biology
https://www.readbyqxmd.com/read/29439291/neurobiological-features-of-fibromyalgia-are-also-present-among-rheumatoid-arthritis-patients
#18
Neil Basu, Chelsea M Kaplan, Eric Ichesco, Tony Larkin, Richard E Harris, Alison Murray, Gordon Waiter, Daniel J Clauw
OBJECTIVES: Many rheumatoid arthritis (RA) patients report pain despite excellent control of inflammation with immunotherapies. Variable degrees of co-existing fibromyalgia (FM) may explain this disparity. FM has been characterised by aberrant brain functional connectivity, especially between the Default Mode Network (DMN) and insula. We hypothesised that RA patients reporting the highest 2011 ACR FM survey criteria scores- a continuous measure of FM degree also known as fibromyalgianess (FMness)- would demonstrate functional connectivity abnormalities similar to FM...
February 13, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29425327/sleep-disturbances-in-chronic-pain-neurobiology-assessment-and-treatment-in-physical-therapist-practice
#19
Jo Nijs, Olivier Mairesse, Daniel Neu, Laurence Leysen, Lieven Danneels, Barbara Cagnie, Mira Meeus, Maarten Moens, Kelly Ickmans, Dorien Goubert
Among people with chronic pain, insomnia is highly prevalent, closely related to the mechanism of central sensitization, characterized by low-grade neuroinflammation, and commonly associated with stress or anxiety; in addition, it often does not respond effectively to drug treatments. This review article applies the current understanding of insomnia to clinical practice, including assessment and conservative treatment of insomnia in people with chronic pain. Cognitive-behavioral therapy for insomnia can be efficacious for improvements in sleep initiation, sleep maintenance, perceived sleep quality, and pain interference with daily functioning in people with chronic pain...
May 1, 2018: Physical Therapy
https://www.readbyqxmd.com/read/29408808/pain-control-through-selective-chemo-axotomy-of-centrally-projecting-trpv1-sensory-neurons
#20
Matthew R Sapio, John K Neubert, Danielle M LaPaglia, Dragan Maric, Jason M Keller, Stephen J Raithel, Eric L Rohrs, Ethan M Anderson, John A Butman, Robert M Caudle, Dorothy C Brown, John D Heiss, Andrew J Mannes, Michael J Iadarola
Agonists of the vanilloid receptor transient vanilloid potential 1 (TRPV1) are emerging as highly efficacious nonopioid analgesics in preclinical studies. These drugs selectively lesion TRPV1+ primary sensory afferents, which are responsible for the transmission of many noxious stimulus modalities. Resiniferatoxin (RTX) is a very potent and selective TRPV1 agonist and is a promising candidate for treating many types of pain. Recent work establishing intrathecal application of RTX for the treatment of pain resulting from advanced cancer has demonstrated profound analgesia in client-owned dogs with osteosarcoma...
April 2, 2018: Journal of Clinical Investigation
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