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Pain and migraine

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https://www.readbyqxmd.com/read/27924350/-use-of-intracutaneous-or-subcutaneous-botulinum-toxin-for-postherpetic-neuralgia
#1
L Halb, B J Amann, H Bornemann-Cimenti
BACKGROUND: Botulinum neurotoxin (BoNT), a toxin of the anaerobic spore-forming bacterium Clostridium botulinum is used as a drug for alleviating muscle spasticity. Other indications include the cosmetic application in facial muscles, hyperhidrosis and neurogenic bladder disorders. It has been approved since 2010 as the first prophylactic treatment for chronic migraine. The analgesic effect of BoNT was observed early on and is currently the subject of intensive research. Painful postherpetic neuralgia is a common complication of an infection with herpes zoster virus...
December 6, 2016: Der Nervenarzt
https://www.readbyqxmd.com/read/27919795/current-and-novel-insights-into-the-neurophysiology-of-migraine-and-its-implications-for-therapeutics
#2
REVIEW
Simon Akerman, Marcela Romero-Reyes, Philip R Holland
Migraine headache and its associated symptoms have plagued humans for two millennia. It is manifest throughout the world, and affects more than 1/6 of the global population. It is the most common brain disorder, and is characterized by moderate to severe unilateral headache that is accompanied by vomiting, nausea, photophobia, phonophobia, and other hypersensitive symptoms of the senses. While there is still a clear lack of understanding of its neurophysiology, it is beginning to be understood, and it seems to suggest migraine is a disorder of brain sensory processing, characterized by a generalized neuronal hyperexcitability...
December 2, 2016: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27919023/does-pain-sensitivity-change-by-migraine-phase-a-blinded-longitudinal-study
#3
Martin Uglem, Petter Moe Omland, Kristian Bernhard Nilsen, Erling Tronvik, Lars Jacob Stovner, Knut Hagen, Mattias Linde, Trond Sand
OBJECTIVE: Studies suggest that pain thresholds may be altered before and during migraine headaches, but it is still debated if a central or peripheral dysfunction is responsible for the onset of pain in migraine. The present blinded longitudinal study explores alterations in thermal pain thresholds and suprathreshold heat pain scores before, during, and after headache. METHODS: We measured pain thresholds to cold and heat, and pain scores to 30 seconds of suprathreshold heat four times in 49 migraineurs and once in 31 controls...
November 15, 2016: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/27919018/trigeminal-nervous-system-sensitization-by-infraorbital-nerve-injury-enhances-responses-in-a-migraine-model
#4
Midori Toyama, Chiho Kudo, Chikako Mukai, Mika Inoue, Aiko Oyamaguchi, Hiroshi Hanamoto, Mitsutaka Sugimura, Hitoshi Niwa
BACKGROUND: Although the peripheral and central sensitizations of trigeminal nervous system may be one of the important factors of migraine, the precise mechanism is not fully understood. In this study, we examined the influence of the sensitization of the second division of the trigeminal nerve (V2) by chronic constriction injury (CCI) of the infraorbital nerve (ION) on migraine headache, using the capsaicin-induced migraine model. METHODS: Male Sprague-Dawley rats were assigned to four groups: (a) sham surgery and topical-dural vehicle application (Sham + Vehicle) group, (b) CCI-ION and topical-dural vehicle application (CCI-ION + Vehicle) group, (c) sham surgery and topical-dural capsaicin application (Sham + Capsaicin) group, (d) CCI-ION and topical-dural capsaicin application (CCI-ION + Capsaicin) group...
November 9, 2016: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/27919017/effects-of-kynurenic-acid-analogue-1-kyna-a1-in-nitroglycerin-induced-hyperalgesia-targets-and-anti-migraine-mechanisms
#5
Rosaria Greco, Chiara Demartini, Anna Maria Zanaboni, Elisa Redavide, Selena Pampalone, Joseph Toldi, Ferenc Fülöp, Fabio Blandini, Giuseppe Nappi, Giorgio Sandrini, László Vécsei, Cristina Tassorelli
BACKGROUND: Trigeminal sensitization represents a major mechanism underlying migraine attacks and their recurrence. Nitroglycerin (NTG) administration provokes spontaneous migraine-like headaches and in rat, an increased sensitivity to the formalin test. Kynurenic acid (KYNA), an endogenous regulator of glutamate activity and its analogues attenuate NTG-induced neuronal activation in the nucleus trigeminalis caudalis (NTC). The anti-hyperalgesic effect of KYNA analogue 1 (KYNA-A1) was investigated on animal models specific for migraine pain...
November 14, 2016: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/27917413/efficacy-of-s-lacosamide-in-preclinical-models-of-cephalic-pain
#6
Aubin Moutal, Nathan Eyde, Edwin Telemi, Ki Duk Park, Jennifer Y Xie, David W Dodick, Frank Porreca, Rajesh Khanna
Migraine is one of the world's most common neurological disorders. Current acute migraine treatments have sub-optimal efficacy and new therapeutic options are needed. Approaches targeting calcitonin gene related peptide (CGRP) signaling are clinically effective but small molecule antagonists have not been advanced due to toxicity. In this study, we explored the axonal growth/specification collapsin response mediator protein 2 (CRMP2) as a novel "druggable" target for inhibiting CGRP release and for potential relevance for treatment of migraine pain...
June 2016: Pain Reports (Baltimore, Md.)
https://www.readbyqxmd.com/read/27910899/glial-pannexin1-contributes-to-tactile-hypersensitivity-in-a-mouse-model-of-orofacial-pain
#7
Regina Hanstein, Menachem Hanani, Eliana Scemes, David C Spray
Drug studies in animal models have implicated pannexin1 (Panx1) in various types of pain, including trigeminal hypersensitivity, neuropathic pain and migraine. However, the tested drugs have limited specificity and efficacy so that direct evidence for Panx1 contribution to pain has been lacking. We here show that tactile hypersensitivity is markedly attenuated by deletion of Panx1 in a mouse model of chronic orofacial pain; in this model, trigeminal ganglion Panx1 expression and function are markedly enhanced...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910097/chronic-migraine-an-update-on-physiology-imaging-and-the-mechanism-of-action-of-two-available-pharmacologic-therapies
#8
Sheena K Aurora, Mitchell F Brin
Several lines of research support the hypothesis that migraine is a spectrum of illness, with clinical symptoms that vary along a continuum from episodic migraine to chronic migraine. Physiologic changes may result in episodic migraine evolving into chronic migraine over months to years in susceptible individuals. With chronification, headache frequency increases, becoming more disabling and less responsive to therapy. Neurophysiologic and functional imaging research has reported that chronic migraine may be associated with severity-specific metabolic, functional, and structural abnormalities in the brainstem...
December 2, 2016: Headache
https://www.readbyqxmd.com/read/27910088/the-efficacy-of-greater-occipital-nerve-blockade-in-chronic-migraine-a-placebo-controlled-study
#9
H L Gul, A O Ozon, O Karadas, G Koc, L E Inan
OBJECTIVE: GON blockade with local anesthetics is an effective treatment for a group of headaches, such as cervicogenic headache, cluster headache, occipital neuralgia, migraine. Our aim was to evaluate the efficacy of greater occipital nerve (GON) blockade in patients with chronic migraine (CM) by using a control group. MATERIALS AND METHODS: We included 44 CM patients and randomly divide the patients into two groups, as group A (bupivacaine) and group B (placebo) to our study...
December 2, 2016: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/27910087/menstrual-migraine-and-treatment-options-review
#10
REVIEW
Kasra Maasumi, Stewart J Tepper, Jennifer S Kriegler
OBJECTIVE: A review of treatment options for menstrual migraine. BACKGROUND: Migraine affects ∼30 million people in the US. A subset of female migraineurs have migraines that are mainly associated with menstruation. Menstrual migraine (MM) is divided into pure MM and menstrually related migraine. Pure MM attacks occur only with menstruation and have a prevalence of 1%. Menstrually related migraine has a prevalence of 6-7%, and occurs both during menstruation as well as during the rest of the cycle...
December 2, 2016: Headache
https://www.readbyqxmd.com/read/27902848/topiramate-in-migraine-prevention-a-2016-perspective
#11
Stephen D Silberstein
BACKGROUND: In evidence-based guidelines published in 2000, topiramate was a third-tier migraine preventive with no scientific evidence of efficacy; recommendation for its use reflected consensus opinion and clinical experience. Its neurostabilizing activity, coupled with its favorable weight profile, made topiramate an attractive alternative to other migraine preventives that caused weight gain. When guidelines for migraine prevention in episodic migraine were published in 2012, topiramate was included as a first-line option based on double-blind, randomized controlled trials involving nearly 3000 patients...
November 30, 2016: Headache
https://www.readbyqxmd.com/read/27899434/development-of-cgrp-dependent-pain-and-headache-related-behaviours-in-a-rat-model-of-concussion-implications-for-mechanisms-of-post-traumatic-headache
#12
Dara Bree, Dan Levy
BACKGROUND AND OBJECTIVE: Posttraumatic headache (PTH) is one of the most common, debilitating and difficult symptoms to manage after a mild traumatic brain injury, or concussion. However, the mechanisms underlying PTH remain elusive, in part due to the lack of a clinically relevant animal model. Here, we characterized for the first time, headache and pain-related behaviours in a rat model of concussion evoked by a mild closed head injury (mCHI) - the major type of military and civilian related trauma associated with PTH - and tested responses to current and novel headache therapies...
November 29, 2016: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/27898338/effect-of-pgd2-on-middle-meningeal-artery-and-mrna-expression-profile-of-l-pgd2-synthase-and-dp-receptors-in-trigeminovascular-system-and-other-pain-processing-structures-in-rat-brain
#13
Aysegül Sekeroglu, Julie Mie Jacobsen, Inger Jansen-Olesen, Saurabh Gupta, Majid Sheykhzade, Jes Olesen, Deepak K Bhatt
BACKGROUND: Prostaglandins (PGs), particularly prostaglandin D2 (PGD2), E2 (PGE2), and I2 (PGI2), are considered to play a role in migraine pain. In humans, infusion of PGD2 causes lesser headache as compared to infusion of PGE2 and PGI2. Follow-up studies in rats have shown that infusion of PGE2 and PGI2 dilate the middle meningeal artery (MMA), and mRNA for PGE2 and PGI2 receptors is present in rat trigeminovascular system (TVS) and in the brain structures associated with pain. In the present study, we have characterized the dilatory effect of PGD2 on rat MMA and studied the relative mRNA expression of PGD2 receptors and lipocalin-type of PGD2 synthase (L-PGDS)...
September 19, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27889366/intranasal-lidocaine-in-acute-treatment-of-migraine-a-randomized-controlled-trial
#14
Nazire Avcu, Nurettin Özgür Doğan, Murat Pekdemir, Elif Yaka, Serkan Yılmaz, Cansu Alyeşil, Latif Erdem Akalın
STUDY OBJECTIVE: The study aims to evaluate the efficacy and safety of intranasal lidocaine administration for migraine treatment. METHODS: This single-center, double-blind, randomized, controlled trial was conducted in a tertiary care emergency department. Included patients met the migraine criteria of the International Headache Society. Patients were randomized to intranasal lidocaine or saline solution; all participants received 10 mg of intravenous metoclopramide...
November 23, 2016: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/27886414/chronic-ghrelin-treatment-reduced-photophobia-and-anxiety-like-behaviors-in-ntg-induced-migraine-role-of-pituitary-adenylate-cyclase-activating-polypeptide
#15
Fereshteh Farajdokht, Shirin Babri, Pouran Karimi, Mohammad Reza Alipour, Ramin Bughchechi, Gisou Mohaddes
Chronic migraine is a debilitating disorder that has a significant impact on patients and society. Nearly all migraineurs frequently reported light sensitivity during a headache attack. Pituitary adenylate cyclase-activating polypeptide (PACAP) plays an important role in the activation of trigeminal system and migraine pain. To identify the effect of chronic ghrelin treatment on endogenous PACAP and associated symptoms of migraine, an experimental chronic migraine model was induced by intermittent intraperitoneal (i...
November 25, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27885640/differences-in-topographical-pressure-pain-sensitivity-maps-of-the-scalp-between-patients-with-migraine-and-healthy-controls
#16
Johanna Barón, Marina Ruiz, María Palacios-Ceña, Pascal Madeleine, Ángel L Guerrero, Lars Arendt-Nielsen, César Fernández-de-Las-Peñas
OBJECTIVE: To investigate differences in topographical pressure pain sensitivity maps of the scalp between patients with migraine and healthy controls considering the chronicity (episodic/chronic) and side (strictly unilateral/bilateral) of the symptoms. BACKGROUND: It seems that the trigeminal area is sensitized in migraine. No study has investigated topographical pressure sensitivity maps of the scalp in patients with migraine. METHODS: Pressure pain thresholds (PPTs) were assessed from 21 points distributed over the scalp in 86 patients with episodic migraine, 76 with chronic migraine, and 42 healthy age and matched healthy controls in a blinded design...
November 25, 2016: Headache
https://www.readbyqxmd.com/read/27884688/severe-pain-in-veterans-the-impact-of-age-and-sex-and-comparisons-to-the-general-population
#17
Richard L Nahin
: This study provides national prevalence estimates of US military Veterans with severe pain, and compares Veterans to nonveterans of similar age and sex. Data used are from the 2010-2014 National Health Interview Survey (NHIS) on 67,696 adults who completed the Adult Functioning and Disability (AFD) Supplement. Participants with severe pain were identified using a validated pain severity coding system imbedded in the NHIS AFD. It was estimated that 65.5% of US military Veterans reported pain in the previous 3 months, with 9...
November 21, 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/27883293/psychological-mislabeling-of-chronic-pain-lessons-from-migraine-in-the-20th-century
#18
Howard B Pikoff
Starting with Freud, psychoanalytically oriented practitioners described a complex of unconscious conflicts, desires and personality traits they believed to be the primary cause of a wide range of medical disorders. This was the psychogenic model. With the advance of basic research and pharmacotherapy, the psychogenic model was gradually replaced by a biopsychobehavioral model. This model treats chronic pain as a biologically based disorder that can be influenced by psychological factors and lifestyle. The present paper argues that many patients with chronic pain may not be significantly impacted by psychological factors, and that for those who are, cognitive-behavioral therapy is the treatment of choice...
November 24, 2016: Pain Management
https://www.readbyqxmd.com/read/27878523/intravenous-ketamine-for-subacute-treatment-of-refractory-chronic-migraine-a-case-series
#19
Clinton Lauritsen, Santiago Mazuera, Richard B Lipton, Sait Ashina
BACKGROUND: Refractory migraine is a challenging condition with great impact on health related quality of life. Intravenous (IV) ketamine has been previously used to treat various refractory pain conditions. We present a series of patients with refractory migraine treated with intravenous ketamine in the hospital setting. METHODS: Based on retrospective chart review, we identified six patients with refractory migraine admitted from 2010 through 2014 for treatment with intravenous ketamine...
December 2016: Journal of Headache and Pain
https://www.readbyqxmd.com/read/27873376/extended-long-term-effects-of-cervical-vagal-nerve-stimulation-on-headache-intensity-frequency-and-affective-cognitive-headache-perception-in-drug-resistant-complex-partial-seizure-patients
#20
Bogdan Pintea, Kevin Hampel, Jan Boström, Rainer Surges, Hartmut Vatter, Ilana S Lendvai, Thomas M Kinfe
OBJECTIVES: Invasive vagal nerve stimulation (iVNS) is an established treatment option for drug-resistant focal seizures and has been assumed to diminish frequent co-incidental daily headache/migraine. However, long-term effects on cognitive/affective head pain perception, headache intensity/frequency are lacking. We therefore investigated potential iVNS-induced effects in patients with drug-resistant focal seizure and daily headache/migraine. MATERIALS AND METHODS: A clinical database was used to select 325 patients with drug-resistant epilepsy treated by either iVNS plus best medical treatment (BMT) or BMT alone, compared to a healthy control group (HC)...
November 22, 2016: Neuromodulation: Journal of the International Neuromodulation Society
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