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Pain AND brain changes

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https://www.readbyqxmd.com/read/29230542/secondary-intracranial-hypertension-pseudotumor-cerebri-presenting-as-post-traumatic-headache-in-mild-traumatic-brain-injury-a-case-series
#1
Tonia Sabo, Charlene Supnet, Sushmita Purkayastha
BACKGROUND: Cerebral edema peaks 36-72 h after moderate traumatic brain injury but thought to be uncommon after mild traumatic brain injury. Post-traumatic headache can develop 48-72 h post-injury, perhaps reflecting the developing cerebral edema. Pseudotumor cerebri can result from various causes, including cerebral edema, and is characterized by increased intracranial pressure, headache, visual, and other common symptoms. Our objective was to report a phenotypically identifiable post-traumatic headache subtype...
December 11, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29229209/randomized-double-blind-placebo-controlled-dose-escalation-study-investigation-of-the-safety-pharmacokinetics-and-antihyperalgesic-activity-of-l-4-chlorokynurenine-in-healthy-volunteers
#2
Mark Wallace, Alexander White, Kathy A Grako, Randal Lane, Allen Jo Cato, H Ralph Snodgrass
BACKGROUND AND AIMS: Neuropathic pain is a significant medical problem needing more effective treatments with fewer side effects. Overactive glutamatergic transmission via N-methyl-d-aspartate receptors (NMDARs) are known to play a role in central sensitization and neuropathic pain. Although ketamine, a NMDAR channel-blocking antagonist, is often used for neuropathic pain, its side-effect profile and abusive potential has prompted the search for a safer effective oral analgesic. A novel oral prodrug, AV-101 (l-4 chlorokynurenine), which, in the brain, is converted into one of the most potent and selective GlyB site antagonists of the NMDAR, has been demonstrated to be active in animal models of neuropathic pain...
October 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29227505/neurobiology-of-sexual-assault-and-osteopathic-considerations-for-trauma-informed-care-and-practice
#3
Kristen M Cuevas, Jane Balbo, Krista Duval, Elizabeth A Beverly
Sexual assault is a traumatic event with potentially devastating lifelong effects on physical and emotional health. Sexual assault is associated with gastrointestinal, neurologic, and reproductive symptoms, as well as obesity, diabetes, and chronic pain. With 1 in 3 women and 1 in 6 men experiencing some form of unwanted sexual violence in their lifetime, sexual assault is a significant public health problem that necessitates attention in the medical community. This review discusses relevant literature on the neurobiologic changes that occur as a consequence of sexual assault, such as how the brain responds during a traumatic experience and the impact of trauma on memory...
December 11, 2017: Journal of the American Osteopathic Association
https://www.readbyqxmd.com/read/29226044/neuroanatomy-and-neuropsychology-of-pain
#4
REVIEW
Shehzad Khalid, R Shane Tubbs
We have reviewed here the neuroanatomical and neuropsychological literature of the human brain and have proposed the various pain mechanisms that we currently know of. Essentially when tissue is damaged, peripheral nociceptors are activated continuously and prostanoids are hence produced. Nonsteroidal anti-inflammatory drugs (NSAIDs) and medications aim to target these prostanoids to treat the inflammatory component of pain. Normal pain tends to have a protective response. It is important for the nervous system to learn and recognize this painful stimulus earlier and quicker with repeated exposure to avoid tissue damage...
October 6, 2017: Curēus
https://www.readbyqxmd.com/read/29213232/stress-induced-chronic-visceral-pain-of-gastrointestinal-origin
#5
REVIEW
Beverley Greenwood-Van Meerveld, Anthony C Johnson
Visceral pain is generally poorly localized and characterized by hypersensitivity to a stimulus such as organ distension. In concert with chronic visceral pain, there is a high comorbidity with stress-related psychiatric disorders including anxiety and depression. The mechanisms linking visceral pain with these overlapping comorbidities remain to be elucidated. Evidence suggests that long term stress facilitates pain perception and sensitizes pain pathways, leading to a feed-forward cycle promoting chronic visceral pain disorders such as irritable bowel syndrome (IBS)...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/29212562/a-randomised-controlled-trial-of-the-monoaminergic-stabiliser-osu6162-in-treatment-of-myalgic-encephalomyelitis-chronic-fatigue-syndrome
#6
Marie Karin Lena Nilsson, Olof Zachrisson, Carl-Gerhard Gottfries, Michael Matousek, Birgitta Peilot, Sara Forsmark, Robert Christiaan Schuit, Maria Lizzie Carlsson, Angelica Kloberg, Arvid Carlsson
OBJECTIVE: The monoaminergic stabiliser (-)-OSU6162 has in previous studies shown promising effects on mental fatigue after stroke and traumatic brain injury. This study investigated the safety and effectiveness of (-)-OSU6162 in patients with myalgic encephalomyelitis/chronic fatigue syndrome. METHODS: A total of 62 patients were randomly assigned to placebo or (-)-OSU6162. Primary outcomes were assessment on the mental fatigue scale (MFS) and the clinical global impression of change (CGI-C) scale...
December 7, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/29212484/clinical-features-of-visual-disturbances-secondary-to-isolated-sphenoid-sinus-inflammatory-diseases
#7
Lanlan Chen, Libin Jiang, Bentao Yang, Prem S Subramanian
BACKGROUND: Visual disturbances associated with isolated sphenoid sinus inflammatory diseases (ISSIDs) are easily misdiagnosed due to the nonspecific symptoms and undetectable anatomical location. The main objective of this retrospective case series is to investigate the clinical features of visual disturbances secondary to ISSIDs. METHODS: Clinical data of 23 patients with unilateral or bilateral visual disturbances secondary to ISSIDs from 2004 to 2014 with new symptoms were collected...
December 6, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29212177/differences-in-brain-gray-matter-volume-in-patients-with-crohn-s-disease-with-and-without-abdominal-pain
#8
Chunhui Bao, Peng Liu, Yin Shi, Luyi Wu, Xiaoming Jin, Xiaoqing Zeng, Jianye Zhang, Di Wang, Huirong Liu, Huangan Wu
Increasing evidence indicates that abnormal pain processing is present in the central nervous system of patients with Crohn's disease (CD). The purposes of this study were to assess changes in gray matter (GM) volumes in CD patients in remission and to correlate structural changes in the brain with abdominal pain. We used a 3.0 T magnetic resonance scanner to examine the GM structures in 21 CD patients with abdominal pain, 26 CD patients without abdominal pain, and 30 healthy control subjects (HCs). Voxel-based morphometric analyses were used to assess the brain GM volumes...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29210950/a-prospective-study-of-pain-from-magnetic-resonance-imaging-with-cochlear-implant-magnets-in-situ
#9
Seth E Pross, Bryan K Ward, Jeffrey D Sharon, Heather M Weinreich, Nafi Aygun, Howard W Francis
OBJECTIVE: To describe changes in pain associated with magnetic resonance imaging (MRI) with cochlear implant magnets in place. STUDY DESIGN: Prospective, single-arm study. SETTING: Tertiary referral center. SUBJECTS: Adults with cochlear implants requiring MRI. INTERVENTION: Tight head wrapping over internal device during MRI. MAIN OUTCOME MEASURES: Change in pain score using an 11-point visual analogue scale, duration/completion of MRI, body mass index (BMI), quality of pain, status of the skin, functioning of implant, displacement/polarity change of magnet, willingness to repeat MRI without magnet removal...
November 28, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29209883/disseminated-juvenile-xanthogranuloma-occurring-after-treatment-of-langerhans-cell-histiocytosis-a-case-report
#10
Tae-Kyu Lee, Tae-Young Jung, Hee-Jo Baek, Seul-Kee Kim, Kyung-Hwa Lee, Sook Jung Yun
CASE PRESENTATION: An 11-year-old boy presented with a complaint of a painful temporal mass. Brain magnetic resonance imaging (MRI) showed a 3-cm-sized, homogeneously enhancing mass in the greater wing of the left sphenoid bone, which was diagnosed as Langerhans cell histiocytosis (LCH). Chemotherapy with vincristine and prednisolone was performed for 1 year. After 1 year and 11 months off treatment, he developed symptoms such as polydipsia and polyuria. Brain MRI showed thickening of the pituitary stalk with enhancement, suggestive of LCH involvement, and no recurrence in the sphenoid bone...
December 5, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29203153/focused-ultrasound-subthalamotomy-in-patients-with-asymmetric-parkinson-s-disease-a-pilot-study
#11
Raul Martínez-Fernández, Rafael Rodríguez-Rojas, Marta Del Álamo, Frida Hernández-Fernández, Jose A Pineda-Pardo, Michele Dileone, Fernando Alonso-Frech, Guglielmo Foffani, Ignacio Obeso, Carmen Gasca-Salas, Esther de Luis-Pastor, Lydia Vela, José A Obeso
BACKGROUND: Ablative neurosurgery has been used to treat Parkinson's disease for many decades. MRI-guided focused ultrasound allows focal lesions to be made in deep brain structures without skull incision. We investigated the safety and preliminary efficacy of unilateral subthalamotomy by focused ultrasound in Parkinson's disease. METHODS: This prospective, open-label pilot study was done at CINAC (Centro Integral de Neurociencias), University Hospital HM Puerta del Sur in Madrid, Spain...
December 1, 2017: Lancet Neurology
https://www.readbyqxmd.com/read/29200428/low-empathy-like-behaviour-in-male-mice-associates-with-impaired-sociability-emotional-memory-physiological-stress-reactivity-and-variations-in-neurobiological-regulations
#12
Giovanni Laviola, Francesca Zoratto, Danilo Ingiosi, Valentina Carito, Damien Huzard, Marco Fiore, Simone Macrì
Deficits in empathy have been proposed to constitute a hallmark of several psychiatric disturbances like conduct disorder, antisocial and narcissistic personality disorders. Limited sensitivity to punishment, shallow or deficient affect and reduced physiological reactivity to environmental stressors have been often reported to co-occur with limited empathy and contribute to the onset of antisocial phenotypes. Empathy in its simplest form (i.e. emotional contagion) is addressed in preclinical models through the evaluation of the social transmission of emotional states: mice exposed to a painful stimulus display a higher response if in the presence of a familiar individual experiencing a higher degree of discomfort, than in isolation...
2017: PloS One
https://www.readbyqxmd.com/read/29199761/difference-in-regional-brain-volume-between-fibromyalgia-patients-and-long-term-meditators
#13
Nicolás Fayed, Gracián García-Martí, Roberto Sanz-Requena, Luis Marti-Bonmatí, Javier Garcia-Campayo
BACKGROUND: The practice of meditation has been shown to improve pain-related quality of life and also to alter brain activity. To assess brain volumetry in fibromyalgia (FM) patients, healthy meditators and healthy non-meditator control groups, and to elucidate the possible association between brain changes in meditators and years of meditation practice. METHODS: Twelve patients diagnosed with FM, eleven long-term Zen meditators and ten healthy control subjects closely matched for sex and age were recruited...
November 2017: Actas Españolas de Psiquiatría
https://www.readbyqxmd.com/read/29199028/sex-dependent-influences-of-morphine-and-its-metabolites-on-pain-sensitivity-in-the-rat
#14
H H Doyle, A Z Murphy
Preclinical studies report that the effective dose for morphine is approximately 2-fold higher in females than males. Following systemic administration, morphine is metabolized via Phase II glucuronidation in the liver and brain into two active metabolites: morphine-3-glucuronide (M3G) and morphine-6-glucuronide (M6G), each possessing distinct pharmacological profiles. M6G binds to μ opioid receptors and acts as a potent analgesic. In contrast, M3G binds to toll-like receptor 4 (TLR4), initiating a neuroinflammatory response that directly opposes the analgesic effects of morphine and M6G...
November 30, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29190741/preoperative-transcranial-direct-current-stimulation-exploration-of-a-novel-strategy-to-enhance-neuroplasticity-before-surgery-to-control-postoperative-pain-a-randomized-sham-controlled-study
#15
Hugo Ribeiro, Ricardo Bertol Sesterhenn, Andressa de Souza, Ana Claudia de Souza, Monique Alves, Jessica Catarina Machado, Nathalia Bofill Burger, Iraci Lucena da Silva Torres, Luciana Cadore Stefani, Felipe Fregni, Wolnei Caumo
BACKGROUND: An imbalance in the excitatory/inhibitory systems in the pain networks may explain the persistent chronic pain after hallux valgus surgery. Thus, to contra-regulate this dysfunction, the use of transcranial direct current stimulation (tDCS) becomes attractive. OBJECTIVE: We tested the hypothesis that two preoperative active(a)-tDCS sessions compared with sham(s)-tDCS could improve the postoperative pain [as indexed by Visual Analogue Scale (VAS) at rest and during walking (primary outcomes)]...
2017: PloS One
https://www.readbyqxmd.com/read/29184740/can-friedberg-s-triad-solve-persistent-anesthesia-problems-over-medication-pain-management-postoperative-nausea-and-vomiting
#16
Barry L Friedberg
Friedberg's Triad is (1) measure the brain; (2) preempt the pain; (3) emetic drugs abstain. Persistent anesthesia problems include over- and under-medication, postoperative pain management, and postoperative nausea and vomiting. Inspired by Vinnik's diazepam-ketamine paradigm, Friedberg's propofol ketamine paradigm was first published in 1993. The 1997 addition of the bispectral (BIS) index brain monitor made the propofol ketamine paradigm numerically reproducible. The 1998 addition of the frontalis electromyogram (EMG) as a secondary trend to the BIS transformed the time-delayed BIS monitor into a real-time, extremely useful device...
October 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/29175957/brainstem-pain-control-circuitry-connectivity-in-chronic-neuropathic-pain
#17
E P Mills, F Di Pietro, Z Alshelh, C C Peck, G M Murray, E R Vickers, L A Henderson
Preclinical investigations have suggested that altered functioning of brainstem pain modulation circuits may be crucial for the maintenance of some chronic pain conditions. Whilst some human psychophysical studies show that patients with chronic pain display altered pain modulation efficacy, it remains unknown if brainstem pain modulation circuits are altered in individuals with chronic pain. The aim of the present investigation was to determine whether, in humans, chronic pain following nerve injury is associated with altered on-going functioning of the brainstem descending modulation systems...
November 23, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29175055/cortical-morphometric-changes-after-spinal-cord-injury
#18
Raffaele Nardone, Yvonne Höller, Luca Sebastianelli, Viviana Versace, Leopold Saltuari, Francesco Brigo, Piergiorgio Lochner, Eugen Trinka
Neuroimaging studies suggest that spinal cord injury (SCI) may lead to significant anatomical alterations in the human sensorimotor system. In particular, voxel-based morphometry (VBM) of cortical volume has revealed a significant gray and white matter atrophy bilaterally in the primary sensory cortex (S1). By contrast, some structural studies failed to detect changes in gray matter volume (GMV) in the primary motor cortex (M1) following SCI, whereas others have reported a substantial decrease of GMV also in M1...
November 23, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/29173508/what-s-in-a-word-how-instructions-suggestions-and-social-information-change-pain-and-emotion
#19
REVIEW
Leonie Koban, Marieke Jepma, Stephan Geuter, Tor D Wager
Instructions, suggestions, and other types of social information can have powerful effects on pain and emotion. Prominent examples include observational learning, social influence, placebo, and hypnosis. These different phenomena and their underlying brain mechanisms have been studied in partially separate literatures, which we discuss, compare, and integrate in this review. Converging findings from these literatures suggest that (1) instructions and social information affect brain systems associated with the generation of pain and emotion, and with reinforcement learning, and that (2) these changes are mediated by alterations in prefrontal systems responsible for top-down control and the generation of affective meaning...
October 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29163243/functional-alterations-of-postcentral-gyrus-modulated-by-angry-facial-expressions-during-intraoral-tactile-stimuli-in-patients-with-burning-mouth-syndrome-a-functional-magnetic-resonance-imaging-study
#20
Atsuo Yoshino, Yasumasa Okamoto, Mitsuru Doi, Go Okada, Masahiro Takamura, Naho Ichikawa, Shigeto Yamawaki
Previous findings suggest that negative emotions could influence abnormal sensory perception in burning mouth syndrome (BMS). However, few studies have investigated the underlying neural mechanisms associated with BMS. We examined activation of brain regions in response to intraoral tactile stimuli when modulated by angry facial expressions. We performed functional magnetic resonance imaging on a group of 27 BMS patients and 21 age-matched healthy controls. Tactile stimuli were presented during different emotional contexts, which were induced via the continuous presentation of angry or neutral pictures of human faces...
2017: Frontiers in Psychiatry
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