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Chronic pain AND brain changes

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https://www.readbyqxmd.com/read/28633971/manganese-enhanced-magnetic-resonance-imaging-depicts-brain-activity-in-models-of-acute-and-chronic-pain-a-new-window-to-study-experimental-spontaneous-pain
#1
I M Devonshire, J J Burston, L Xu, A Lillywhite, M J Prior, D J G Watson, C M Greenspon, S J Iwabuchi, D P Auer, V Chapman
Application of functional imaging techniques to animal models is vital to understand pain mechanisms, but is often confounded by the need to limit movement artefacts with anaesthesia, and a focus on evoked responses rather than clinically relevant spontaneous pain and related hyperalgesia. The aim of the present study was to investigate the potential of manganese-enhanced magnetic resonance imaging (MEMRI) to measure neural responses during on-going pain that underpins hyperalgesia in pre-clinical models of nociception...
June 17, 2017: NeuroImage
https://www.readbyqxmd.com/read/28628911/a-carasil-patient-from-americas-with-novel-mutation-and-atypical-features-case-presentation-and-literature-review
#2
Muhammad Ibrahimi, Hiroaki Nozaki, Angelica Lee, Osamu Onodera, Raymond Reichwein, Matthew Wicklund, Mohammad El-Ghanem
OBJECTIVE: Reporting a novel mutation in the HTRA1 gene in a CARASIL patient from Americas. METHODS: Clinical presentation and neuroimaging were consistent with CARASIL. HTRA1 DNA sequencing was performed using advanced ("next generation") sequencing technology. The results revealed a homozygous missense mutation as c.616G>A (p.Gly206Arg) in the HTRA1 gene. RESULTS: A 24-year-old man with a history of chronic back pain presented with recurrent ischemic strokes...
June 21, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28609560/resolving-the-contributions-of-anaesthesia-surgery-and-nerve-injury-on-brain-derived-neurotrophic-factor-expression-in-the-medial-prefrontal-cortex-of-male-rats-in-the-cci-model-of-neuropathic-pain
#3
James W M Kang, Kevin A Keay, David Mor
The medial prefrontal cortex (mPFC) is critical for selecting and shaping complex behavioral responses. In rodent models of neuropathic pain there is evidence for both structural and functional changes in the mPFC. Brain derived neurotrophic factor (BDNF) plays a critical role in the normal functioning of the mPFC. It has been suggested that the disruption of complex behaviors and mood seen in some neuropathic pain patients is mediated in part by alterations of BDNF in this cortical region. In Sprague-Dawley rats, mPFC levels of BDNF and TrkB mRNA and protein, were quantified and compared to controls (n = 24) 6 days after either: (a) halothane (1...
June 13, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28608248/the-analgesic-effect-of-trans-resveratrol-is-regulated-by-calcium-channels-in-the-hippocampus-of-mice
#4
Weijie Wang, Yingcong Yu, Jing Li, Lin Wang, Zhi Li, Chong Zhang, Linlin Zhen, Lianshu Ding, Gang Wang, Xiaoyang Sun, Ying Xu
Resveratrol has been widely studied in terms of it's potential to slow the progression of many diseases. But little is known about the mechanism of action in neuropathic pain. Neuropathic pain is the main type of chronic pain associated with tissue injury. Calcium channels and calcium/caffeine-sensitive pools are associated with analgesic pathway involving neuropathic pain. Our previous study suggested that the antinociceptive effect of resveratrol was involved in Ca(2+)/calmodulin-dependent signaling in the spinal cord of mice...
June 12, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28590514/altered-white-matter-microarchitecture-in-the-cingulum-bundle-in-women-with-primary-dysmenorrhea-a-tract-based-analysis-study
#5
Jixin Liu, Hongjuan Liu, Junya Mu, Qing Xu, Tao Chen, Wanghuan Dun, Jing Yang, Jie Tian, Li Hu, Ming Zhang
Primary dysmenorrhea (PD), as characterized by painful menstrual cramps without organic causes, is associated with central sensitization and brain function changes. Previous studies showed the integrated role of the default mode network (DMN) in the pain connectome and its key contribution on how an individual perceives and copes with pain disorders. Here, we aimed to investigate whether the cingulum bundle connecting hub regions of the DMN was disrupted in young women with PD. Diffusion tensor imaging was obtained in 41 PD patients and 41 matched healthy controls (HC) during their periovulatory phase...
June 7, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28579187/functional-mri-bold-response-in-sickle-mice-with-hyperalgesia
#6
Ying Wang, Xiao Wang, Wei Chen, Kalpna Gupta, Xiao-Hong Zhu
Patients with sickle cell anemia (SCA) have abnormal hemoglobin (sickle hemoglobin S) leading to the crystallization of hemoglobin chains in red blood cells (RBCs), which assume sickle shape and display reduced flexibility. Sickle RBCs (sRBCs) adhere to vessel walls and block blood flow, thus preventing oxygen delivery to the tissues leading to vaso-occlusive crises (VOC), acute pain and organ damage. SCA patients often have chronic pain that can be attributed to inflammation, vasculopathy, neuropathy, ischemia-reperfusion injury and organ damage...
June 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28557681/hypnosis-in-cancer-care
#7
Joshua Wortzel, David Spiegel
Cancer affects a growing proportion of the population as survival improves. The illness and its treatment brings a substantial burden of symptoms, including pain, anxiety, insomnia, and grief. Here, the uses of hypnosis in the treatment of these cancer-related problems will be reviewed. The utility of measuring hypnotizability in the clinical setting will be discussed. The current neurobiology of hypnotizability and hypnosis will be reviewed. Methods and results of using hypnosis for pain control in acute and chronic settings will be presented...
July 2017: American Journal of Clinical Hypnosis
https://www.readbyqxmd.com/read/28540180/hemoglobin-and-mean-platelet-volume-predicts-diffuse-t1-mri-white-matter-volume-decrease-in-sickle-cell-disease-patients
#8
Soyoung Choi, Adam M Bush, Matthew T Borzage, Anand A Joshi, William J Mack, Thomas D Coates, Richard M Leahy, John C Wood
Sickle cell disease (SCD) is a life-threatening genetic condition. Patients suffer from chronic systemic and cerebral vascular disease that leads to early and cumulative neurological damage. Few studies have quantified the effects of this disease on brain morphometry and even fewer efforts have been devoted to older patients despite the progressive nature of the disease. This study quantifies global and regional brain volumes in adolescent and young adult patients with SCD and racially matched controls with the aim of distinguishing between age related changes associated with normal brain maturation and damage from sickle cell disease...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28533761/the-frontal-area-with-higher-frequency-response-is-the-principal-feature-of-laser-evoked-potentials-in-rats-with-chronic-inflammatory-pain-a-parallel-factor-analysis-study
#9
Jing Wang, Juan Wang, You Wan, Xiaoli Li
Chronic pain is a pathological developing course of pain. In clinic, an objective indicator is needed for diagnosing and better controlling chronic pain. The abnormal neural responses in chronic pain are reflected by multiple event-related potentials (ERPs) in time, frequency, and location domain, respectively. However, multiple changes in ERPs are not applicable in clinic. So, the principal feature covered the most informative changes extracted from these three domains of ERP during the development of chronic pain is needed...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28523214/complex-regional-pain-syndrome-the-matter-of-white-matter
#10
Jaakko Hotta, Guangyu Zhou, Hanna Harno, Nina Forss, Riitta Hari
INTRODUCTION: Many central pathophysiological aspects of complex regional pain syndrome (CRPS) are still unknown. Although brain-imaging studies are increasingly supporting the contribution of the central nervous system to the generation and maintenance of the CRPS pain, the brain's white-matter alterations are seldom investigated. METHODS: In this study, we used diffusion tensor imaging to explore white-matter changes in twelve CRPS-type-1 female patients suffering from chronic right upper-limb pain compared with twelve healthy control subjects...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28520647/altered-brain-structure-and-function-associated-with-sensory-and-affective-components-of-classic-trigeminal-neuralgia
#11
Yuan Wang, Dong-Yuan Cao, Bethany Remeniuk, Samuel Krimmel, David A Seminowicz, Ming Zhang
Classic trigeminal neuralgia (CTN) is a chronic neuropathic pain state characterized by intense, piercing spasms of the orofacial region, and may be attributable to abnormal pain processing in the central nervous system. Our study investigated neuronal alterations using voxel-based morphometry (VBM), diffuse tensor imaging (DTI), and resting-state functional connectivity in 38 patients with CTN and 38 matched healthy controls. For voxel-based morphometry analyses, patients with CTN displayed gray matter volume (GMV) reductions in the anterior-cingulate cortex (ACC) and mid-cingulate cortex, insula, secondary somatosensory cortex (S2), primary motor cortex (M1), premotor area, and several regions in the temporal lobe...
May 16, 2017: Pain
https://www.readbyqxmd.com/read/28503402/physical-exercise-for-treatment-of-mood-disorders-a-critical-review
#12
C M Hearing, W C Chang, K L Szuhany, T Deckersbach, A A Nierenberg, L G Sylvia
PURPOSE OF THE REVIEW: The purpose of this review is to critically assess the evidence for exercise as an adjunct intervention for major depressive disorder and bipolar disorder, chronic conditions characterized by frequent comorbid conditions as well as interepisodic symptoms with poor quality of life and impaired functioning. Individuals with these mood disorders are at higher risk of cardiovascular disease and premature death in part because of increased rates of obesity, inactivity, and diabetes mellitus compared to the general population...
December 2016: Current Behavioral Neuroscience Reports
https://www.readbyqxmd.com/read/28501595/corticolimbic-circuitry-in-the-modulation-of-chronic-pain-and-substance-abuse
#13
REVIEW
Anna M W Taylor
The transition from acute to chronic pain is accompanied by increased engagement of emotional and motivational circuits. Adaptations within this corticolimbic circuitry contribute to the cellular and behavioral maladaptations associated with chronic pain. Central regions within the corticolimbic brain include the mesolimbic dopamine system, the amygdala, and the medial prefrontal cortex. The evidence reviewed herein supports the notion that chronic pain induces significant changes within these corticolimbic regions that contribute to the chronicity and intractability of pain...
May 10, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28487079/d-aspartic-acid-ameliorates-painful-and-neuropsychiatric-changes-and-reduces-%C3%AE-amyloid-a%C3%AE-1-42-peptide-in-a-long-lasting-model-of-neuropathic-pain
#14
Antimo D'Aniello, Livio Luongo, Rosaria Romano, Monica Iannotta, Ida Marabese, Serena Boccella, Carmela Belardo, Vito de Novellis, Claudio Arra, Antonio Barbieri, Biagio D'Aniello, Anna Scandurra, Laura Migliozzi, George Fisher, Francesca Guida, Sabatino Maione
Depressive symptoms and other neuropsychiatric dysfunctions are common in neurodegenerative disorders, including chronic pain and dementia. A correlation between the β-amyloid protein accumulation and the development of depression has been suggested, however the underlying mechanisms are unknown. d-Aspartate (d-Asp) is a free d-amino acid found in the mammalian brain and involved in neurological and psychiatric processes, such as cognition and affective disorders. In this study we have investigated the effects of a repeated treatment with d-Asp in a long-lasting (12 months) model of neuropathic pain, the spared nerve injury (SNI), in mice...
May 6, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28478818/the-multi-factorial-origins-of-chronic-traumatic-encephalopathy-cte-symptomology-in-post-career-athletes-the-athlete-post-career-adjustment-ap-ca-model
#15
Michael Gaetz
CTE has two prominent components: the pathophysiology that is detected in the brain postmortem and the symptomology that is present in the interval between retirement and end of life. CTE symptomology has been noted to include memory difficulties, aggression, depression, explosivity, and executive dysfunction at early stages progressing to problems with attention, mood swings, visuospatial difficulties, confusion, progressive dementia, and suicidality (e.g. McKee et al. (2012), Omalu et al. (2010a-c), McKee et al...
May 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28469500/lung-adenocarcinoma-presenting-as-worsening-of-chronic-neck-pain-a-cautionary-tale
#16
Neeka N Akhavan, Tony S Brar, Edlira Maska
INTRODUCTION: Neck pain is a common musculoskeletal problem that up to 70% of the world population will experience at some point in their lives. Intramedullary spinal cord metastasis is an exceedingly rare complication of malignancy that affects less than 1% of all patients with cancer. CASE REPORT: We report a case of a 61-year-old man who presented to primary care clinic with 1-month history of worsening neck pain with associated neurologic deficits. Despite initial conservative management, the patient continued to have progressive worsening of sensory and motor deficits...
2017: Clinical Medicine Insights. Case Reports
https://www.readbyqxmd.com/read/28453469/use-of-analgesics-opioids-and-nonsteroidal-anti-inflammatory-drugs-and-dementia-related-neuropathology-in-a-community-based-autopsy-cohort
#17
Sascha Dublin, Rod L Walker, Shelly L Gray, Rebecca A Hubbard, Melissa L Anderson, Onchee Yu, Thomas J Montine, Paul K Crane, Josh A Sonnen, Eric B Larson
BACKGROUND: Opioids may influence the development of Alzheimer's disease (AD). Some studies have observed AD pathology in the brains of opioid abusers. No study has examined the association between prescription opioid use and dementia-related neuropathologic changes. OBJECTIVE: To examine the relationship between prescription opioid or NSAID use and dementia-related neuropathologic changes. METHODS: Within a community-based autopsy cohort (N = 420), we ascertained opioid and nonsteroidal anti-inflammatory drug (NSAID) use over a 10-year period from automated pharmacy data and calculated total standardized daily doses (TSDDs)...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28451808/neuropathic-pain-and-spinal-cord-injury-phenotypes-and-pharmacological-management
#18
REVIEW
Eva Widerström-Noga
Chronic neuropathic pain is a complicated condition after a spinal cord injury (SCI) that often has a lifelong and significant negative impact on life after the injury; therefore, improved pain management is considered a significant and unmet need. Neuropathic pain mechanisms are heterogeneous and the difficulty in determining their individual contribution to specific pain types may contribute to poor treatment outcomes in this population. Thus, identifying human neuropathic pain phenotypes based on pain symptoms, somatosensory changes, or cognitive and psychosocial factors that reflect specific spinal cord or brain mechanisms of neuropathic pain is an important goal...
June 2017: Drugs
https://www.readbyqxmd.com/read/28447501/imaging-acute-and-chronic-pain-in-the-human-brainstem-and-spinal-cord
#19
Luke A Henderson, Kevin A Keay
While acute pain serves as a protective mechanism designed to warn an individual of potential or actual damaging stimuli, chronic pain provides no benefit and is now considered a disease in its own right. Since the advent of human brain imaging techniques, many investigations that have explored the central representation of acute and chronic pain have focused on changes in higher order brain regions. In contrast, far fewer have explored brainstem and spinal cord function, mainly due to significant technical difficulties...
April 1, 2017: Neuroscientist: a Review Journal Bringing Neurobiology, Neurology and Psychiatry
https://www.readbyqxmd.com/read/28444833/chronic-stress-induced-mechanical-hyperalgesia-is-controlled-by-capsaicin-sensitive-neurones-in-the-mouse
#20
B Scheich, P Vincze, É Szőke, É Borbély, Á Hunyady, J Szolcsányi, Á Dénes, Zs Környei, B Gaszner, Zs Helyes
BACKGROUND: Clinical studies demonstrated peripheral nociceptor deficit in stress-related chronic pain states, such as fibromyalgia. The interactions of stress and nociceptive systems have special relevance in chronic pain, but the underlying mechanisms including the role of specific nociceptor populations remain unknown. We investigated the role of capsaicin-sensitive neurones in chronic stress-related nociceptive changes. METHOD: Capsaicin-sensitive neurones were desensitized by the capsaicin analogue resiniferatoxin (RTX) in CD1 mice...
April 25, 2017: European Journal of Pain: EJP
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