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Bashir A, Lipton RB, Ashina S, Ashina M. Migraine and structural changes in the brain: a systematic review and meta-analysis. Neurology 2013; 81:1260-8. [PMID: 23986301 DOI: 10.1212/wnl.0b013e3182a6cb32] [Citation(s) in RCA: 209] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE To evaluate the association between migraine without aura (MO) and migraine with aura (MA) and 3 types of structural brain abnormalities detected by MRI: white matter abnormalities (WMAs), infarct-like lesions (ILLs), and volumetric changes in gray and white matter (GM, WM) regions. METHODS PubMed as well as the reference lists of identified studies and reviews were used to identify potentially eligible studies through January 2013. Candidate studies were reviewed and eligible studies were abstracted. Pooled odds ratios (OR) and 95% confidence intervals (CI) were calculated for WMAs and ILLs. RESULTS Six population-based and 13 clinic-based studies were identified. The studies suggested that structural brain changes, including WMAs, silent ILLs, and volumetric changes in GM and WM regions, were more common in migraineurs than in control groups. The results were strongest for MA. The meta-analysis of WMAs showed an association for MA (OR 1.68; 95% CI 1.07-2.65; p = 0.03) but not for MO (OR 1.34; 95% CI 0.96-1.87; p = 0.08). The association of ILLs was greater for MA (OR 1.44; 95% CI 1.02-2.03; p = 0.04) than for MO, but no association was found for MA (p = 0.52) and MO (p = 0.08) compared to controls. CONCLUSION These data suggest that migraine may be a risk factor for structural changes in the brain. Additional longitudinal studies are needed to determine the differential influence of migraine without and with aura, to better characterize the effects of attack frequency, and to assess longitudinal changes in brain structure and function.
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Affiliation(s)
- Asma Bashir
- From the Danish Headache Center and Department of Neurology (A.B., M.A.), Glostrup Hospital, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, Copenhagen, Denmark; Montefiore Headache Center (R.B.L.), Department of Neurology, Albert Einstein College of Medicine, Bronx; and Headache Program (S.A.), Department of Pain Medicine and Palliative Care, Department of Neurology, Albert Einstein College of Medicine, Beth Israel Medical Center, New York, NY
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Seneviratne U, Chong W, Billimoria P. Brain white matter hyperintensities in migraine: Clinical and radiological correlates. Clin Neurol Neurosurg 2013. [DOI: 10.1016/j.clineuro.2012.10.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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53
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Kaniecki RG, Taylor FR, Landy SH. Abstracts and Citations. Headache 2013. [DOI: 10.1111/head.12147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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54
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Le Pira F, Reggio E, Quattrocchi G, Sanfilippo C, Maci T, Cavallaro T, Zappia M. Executive dysfunctions in migraine with and without aura: what is the role of white matter lesions? Headache 2013; 54:125-30. [PMID: 23808818 DOI: 10.1111/head.12158] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVE/BACKGROUND Executive dysfunctions and white matter lesions on magnetic resonance imaging have been reported in migraine. The aim of this study was to determine whether any correlation between these 2 variables exists. MATERIALS AND METHODS Forty-four subjects affected by migraine with or without aura were compared with 16 healthy subjects. A battery of neuropsychological tests assessing executive functions was administered to all subjects. Number and total volume of white matter lesions were assessed in the whole brain and in the frontal lobe. RESULTS The performances of both groups of migraineurs, with and without aura, were significantly worse when compared with controls on Boston Scanning Test. Moreover, we found lower performances compared with controls respectively on Frontal Assessment Battery in patients with migraine with aura and on Controlled Oral Word Association Test in patients with migraine without aura. Nineteen patients (43.2%) and one control subject (6.2%) had white matter lesions. We did not find any significant correlation between white matter lesions load and neuropsychological performances. CONCLUSIONS On the basis of our results, white matter lesions load on magnetic resonance imaging do not seem to contribute to neuropsychological performances deficit in migraineurs.
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Affiliation(s)
- Francesco Le Pira
- Department of GF Ingrassia, Section of Neurosciences, University of Catania, Catania, Italy
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Kruit MC, Thijs RD, Ferrari MD, Launer LJ, van Buchem MA, van Dijk JG. Syncope and orthostatic intolerance increase risk of brain lesions in migraineurs and controls. Neurology 2013; 80:1958-65. [PMID: 23616159 DOI: 10.1212/wnl.0b013e318293e1c7] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES We and others showed that migraineurs are at increased risk of subclinical and clinical ischemic brain lesions. Migraineurs also have a higher prevalence of frequent syncope and orthostatic intolerance, symptoms that are associated with transient reductions in cerebral blood flow. In this study, we assessed whether these autonomic symptoms may contribute to the increased risk of brain lesions in migraine. METHODS Migraineurs (n = 291) and controls (n = 140) from the population-based, cross-sectional CAMERA (Cerebral Abnormalities in Migraine, an Epidemiologic Risk Analysis) cohort (aged 30-60 years, and free of other neurologic symptoms) underwent 1) brain MRI scan, and 2) structured telephone interview including questions on frequent syncope (≥5/lifetime) and orthostatic intolerance. RESULTS Frequent syncope (odds ratio [OR] = 2.7; 95% confidence interval: 1.3-5.5) and orthostatic intolerance (OR = 2.0 [1.1-3.6]) were independent risk factors for high load of deep white matter lesions. Effects were strongest in women and similar in migraineurs and controls. Migraine diagnosis did not mediate or moderate these associations. Individuals with orthostatic intolerance had higher prevalence of high periventricular white matter lesion load (OR = 1.9 [1.1-3.5]). Syncope and orthostatic intolerance were not related to subclinical infarcts or infratentorial lesions. CONCLUSIONS Frequent syncope, orthostatic intolerance, and migraine independently increase the risk of white matter lesions, particularly in females.
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Affiliation(s)
- Mark C Kruit
- Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands.
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56
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Alhazzani A, Goddeau RP. Migraine and Stroke: A Continuum of Association in Adults. Headache 2013; 53:1023-7. [DOI: 10.1111/head.12115] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/08/2013] [Indexed: 11/27/2022]
Affiliation(s)
- Adel Alhazzani
- Department of Medicine; King Khalid University; Aseer Central Hospital; Abha; Saudi Arabia
| | - Richard P. Goddeau
- Department of Neurology; University of Massachusetts Medical School; Worcester; MA; USA
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Eidlitz-Markus T, Zeharia A, Haimi-Cohen Y, Konen O. MRI white matter lesions in pediatric migraine. Cephalalgia 2013; 33:906-13. [PMID: 23575818 DOI: 10.1177/0333102413480955] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Studies have reported an association between migraine and white matter hyperintensities on T2-weighted brain magnetic resonance imaging (MRI) in adults. The aim of the present study was to evaluate white matter MRI brain findings in pediatric patients with migraine. METHODS The medical files and imaging scans of all 194 patients who underwent brain MRI at the headache clinic of a tertiary medical center in 2008-2011 were reviewed. RESULTS Mean age was 10.9 ± 3.5 years. Migraine was diagnosed in 131 patients and other disorders in 63. In the migraine group, findings on physical and laboratory examinations were within normal range. White matter lesions were identified on MRI scan in 14 children with migraine (10.6%) and none of the children with other disorders ( P = 0.006). In 13/14 patients, the lesions were focal with a variable distribution; in the remaining patient, confluent periventricular hyperintensities were documented. CONCLUSIONS In a headache clinic of a tertiary pediatric medical center, white matter lesions are found in about 10% of pediatric patients with migraine.
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Affiliation(s)
- Tal Eidlitz-Markus
- Pediatric Headache Clinic, Ambulatory Day Care Hospitalization Unit, Schneider Children's Medical Center of Israel, Israel.
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58
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Gelfand AA, Gelfand JM, Goadsby PJ. Migraine and multiple sclerosis: Epidemiology and approach to treatment. Mult Scler Relat Disord 2013; 2:73-9. [DOI: 10.1016/j.msard.2012.10.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Revised: 10/12/2012] [Accepted: 10/18/2012] [Indexed: 11/25/2022]
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Kaniecki RG, Taylor FR, Landy SH. Abstracts and Citations. Headache 2013; 53:686-8. [DOI: 10.1111/head.12079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rist PM, Kurth T. Migraine and cognitive decline: a topical review. Headache 2013; 53:589-98. [PMID: 23405909 DOI: 10.1111/head.12046] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2012] [Indexed: 12/20/2022]
Abstract
Migraine has been linked with an increased risk of stroke and an increased prevalence of clinically silent brain lesions and white-matter hyperintensities. As it is known that stroke and structural brain lesions are associated with an increased risk of cognitive decline, it has been hypothesized that migraine may be a progressive brain disorder and associated with an increased risk of cognitive impairment. Given the prevalence of migraine in the population, especially among women, and the aging of the population, an association between migraine and cognitive impairment would have substantial public health implications. In this review, we will summarize the existing evidence evaluating the association between migraine and cognitive function. Additionally, we will discuss methodological issues in migraine and cognitive function assessment and elaborate on study design strategies to address this important question.
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Affiliation(s)
- Pamela M Rist
- Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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Tana C, Tafuri E, Tana M, Martelletti P, Negro A, Affaitati G, Fabrizio A, Costantini R, Mezzetti A, Giamberardino MA. New insights into the cardiovascular risk of migraine and the role of white matter hyperintensities: is gold all that glitters? J Headache Pain 2013; 14:9. [PMID: 23565964 PMCID: PMC3620371 DOI: 10.1186/1129-2377-14-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 01/23/2013] [Indexed: 01/16/2023] Open
Abstract
The role of migraine as an independent risk factor for cardiovascular events has been debated for several years, while it is more established for ischemic stroke. Recently, new studies have examined the likelihood of migraine to determine cardiovascular events, supporting the hypothesis of a predominant role in patients with migraine with aura, the risk including both sexes. In the literature, multiple pathophysiological mechanisms are described to explain this association, and are here discussed. Furthermore, the emerging evidence that a higher headache frequency and long-term migraine may worsen the cardio-metabolic profile in migraineurs (e.g. with a higher Framingham risk score and risk of developing atherosclerosis, insulin resistance and metabolic syndrome) makes it increasingly necessary to reduce the number and severity of attacks, not only to alleviate the painful symptoms, but also to improve the prognosis in these patients.
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Affiliation(s)
- Claudio Tana
- Department of Medicine, "G, D'Annunzio" University of Chieti, and Center of Excellence on Aging, "G, D'Annunzio" University Foundation, Chieti, Italy
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Aradi M, Schwarcz A, Perlaki G, Orsi G, Kovács N, Trauninger A, Kamson DO, Erdélyi-Bótor S, Nagy F, Nagy SA, Dóczi T, Komoly S, Pfund Z. Quantitative MRI Studies of Chronic Brain White Matter Hyperintensities in Migraine Patients. Headache 2012; 53:752-63. [DOI: 10.1111/head.12013] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2012] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - Norbert Kovács
- Department of Neurology; University of Pécs; Pécs; Hungary
| | | | | | | | - Ferenc Nagy
- Department of Neurology; Kaposi Mór County Hospital; Kaposvár; Hungary
| | | | | | - Sámuel Komoly
- Department of Neurology; University of Pécs; Pécs; Hungary
| | - Zoltán Pfund
- Department of Neurology; University of Pécs; Pécs; Hungary
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Palm-Meinders IH, Koppen H, Terwindt GM, Launer LJ, Konishi J, Moonen JME, Bakkers JTN, Hofman PAM, van Lew B, Middelkoop HAM, van Buchem MA, Ferrari MD, Kruit MC. Structural brain changes in migraine. JAMA 2012; 308:1889-97. [PMID: 23150008 PMCID: PMC3633206 DOI: 10.1001/jama.2012.14276] [Citation(s) in RCA: 156] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
CONTEXT A previous cross-sectional study showed an association of migraine with a higher prevalence of magnetic resonance imaging (MRI)-measured ischemic lesions in the brain. OBJECTIVE To determine whether women or men with migraine (with and without aura) have a higher incidence of brain lesions 9 years after initial MRI, whether migraine frequency was associated with progression of brain lesions, and whether progression of brain lesions was associated with cognitive decline. DESIGN, SETTING, AND PARTICIPANTS In a follow-up of the 2000 Cerebral Abnormalities in Migraine, an Epidemiological Risk Analysis cohort, a prospective population-based observational study of Dutch participants with migraine and an age- and sex-matched control group, 203 of the 295 baseline participants in the migraine group and 83 of 140 in the control group underwent MRI scan in 2009 to identify progression of MRI-measured brain lesions. Comparisons were adjusted for age, sex, hypertension, diabetes, and educational level. The participants in the migraine group were a mean 57 years (range, 43-72 years), and 71% were women. Those in the control group were a mean 55 years (range, 44-71 years), and 69% were women. MAIN OUTCOME MEASURES Progression of MRI-measured cerebral deep white matter hyperintensities, infratentorial hyperintensities, and posterior circulation territory infarctlike lesions. Change in cognition was also measured. RESULTS Of the 145 women in the migraine group, 112 (77%) vs 33 of 55 women (60%) in the control group had progression of deep white matter hyperintensities (adjusted odds ratio [OR], 2.1; 95%CI, 1.0-4.1; P = .04). There were no significant associations of migraine with progression of infratentorial hyperintensities: 21 participants (15%) in the migraine group and 1 of 57 participants (2%) in the control group showed progression (adjusted OR, 7.7; 95% CI, 1.0-59.5; P = .05) or new posterior circulation territory infarctlike lesions: 10 of 203 participants (5%) in the migraine group but none of 83 in the control group (P = .07). There was no association of number or frequency of migraine headaches with progression of lesions. There was no significant association of high vs nonhigh deep white matter hyperintensity load with change in cognitive scores (-3.7 in the migraine group vs 1.4 in the control group; 95% CI, -4.4 to 0.2; adjusted P = .07). CONCLUSIONS In a community-based cohort followed up after 9 years, women with migraine had a higher incidence of deep white matter hyperintensities but did not have significantly higher progression of other MRI-measured brain changes. There was no association of migraine with progression of any MRI-measured brain lesions in men.
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Lakhan SE, Avramut M, Tepper SJ. Structural and functional neuroimaging in migraine: insights from 3 decades of research. Headache 2012; 53:46-66. [PMID: 23094683 DOI: 10.1111/j.1526-4610.2012.02274.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Modern imaging methods provide unprecedented insights into brain structure, perfusion, metabolism, and neurochemistry, both during and between migraine attacks. Neuroimaging investigations conducted in recent decades bring us closer to uncovering migraine as a multifaceted, primarily central nervous system disorder. Three main categories of structural and functional brain changes are described in this review, corresponding to the migrainous aura, ictal headache, and interictal states. These changes greatly advance our understanding of multiple pathophysiologic underpinnings of migraine, from central "migraine generating" loci, to cortical spreading depression, intimate mechanisms underlying activation of neuronal pain pathways in vulnerable patients, central sensitization, and chronification. Structural imaging begins to explain the complex connections between migraine and cerebral vascular events, white matter lesions, grey matter density alterations, iron deposition, and microstructural brain damage. Selected structural and functional alterations of brain structures, as identified with imaging methods, may represent the foundation of new diagnostic strategies and serve as markers of therapeutic efficacy.
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Affiliation(s)
- Shaheen E Lakhan
- From the Center for Headache and Pain, Neurological Institute, Cleveland Clinic, Cleveland, OH, USA (S.E. Lakhan and S.J. Tepper); Biosciences Department, Global Neuroscience Initiative Foundation, Beverly Hills, CA, USA (S.E. Lakhan and M. Avramut)
| | - Mihaela Avramut
- From the Center for Headache and Pain, Neurological Institute, Cleveland Clinic, Cleveland, OH, USA (S.E. Lakhan and S.J. Tepper); Biosciences Department, Global Neuroscience Initiative Foundation, Beverly Hills, CA, USA (S.E. Lakhan and M. Avramut)
| | - Stewart J Tepper
- From the Center for Headache and Pain, Neurological Institute, Cleveland Clinic, Cleveland, OH, USA (S.E. Lakhan and S.J. Tepper); Biosciences Department, Global Neuroscience Initiative Foundation, Beverly Hills, CA, USA (S.E. Lakhan and M. Avramut)
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Serafini G, Pompili M, Innamorati M, Negro A, Fiorillo M, Lamis DA, Erbuto D, Marsibilio F, Romano A, Amore M, D’Alonzo L, Bozzao A, Girardi P, Martelletti P. White matter hyperintensities and self-reported depression in a sample of patients with chronic headache. J Headache Pain 2012; 13:661-7. [PMID: 23080079 PMCID: PMC3484258 DOI: 10.1007/s10194-012-0493-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Accepted: 10/10/2012] [Indexed: 12/26/2022] Open
Abstract
White matter hyperintensities (WMH) have been associated with mood disorders in psychiatric patients. In the present study, we aimed to assess whether WMHs are associated with depressive symptoms and different sensitivity of the behavioral inhibition (BIS), and activation (BAS) systems in patients with chronic headache. Participants were 85 adult outpatients (16 men and 69 women) with a diagnosis of chronic headache. All of the patients underwent brain magnetic resonance imaging (MRI) and were administered the BIS/BAS scales and the Center for Epidemiologic Studies Depression Scale. Above 40 % of patients had periventricular WMHs (PWMHs) and almost 98 % had deep WMHs (DWMHs). Patients with PWMHs reported fewer depressive symptoms than patients without PWMHs. Patients with more severe DWMHs (compared with patients with mild or without DWMH lesions) were older and reported lower scores on the drive dimension of the BIS/BAS scales. In multivariate analyses, patients with PWMHs were 1.06 times more likely to report fewer depressive symptoms than patients without PWMHs. WMH lesions in patients with chronic headache were associated with less depression severity.
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Affiliation(s)
- Gianluca Serafini
- Department of Neurosciences, Mental Health and Sensory Organs, Suicide Prevention Center, Sant’Andrea Hospital, Sapienza University of Rome, 1035-1039, Via di Grottarossa, 00189 Rome, Italy
| | - Maurizio Pompili
- Department of Neurosciences, Mental Health and Sensory Organs, Suicide Prevention Center, Sant’Andrea Hospital, Sapienza University of Rome, 1035-1039, Via di Grottarossa, 00189 Rome, Italy
| | - Marco Innamorati
- Department of Neurosciences, Mental Health and Sensory Organs, Suicide Prevention Center, Sant’Andrea Hospital, Sapienza University of Rome, 1035-1039, Via di Grottarossa, 00189 Rome, Italy
| | - Andrea Negro
- Department of Clinical and Molecular Medicine, Sapienza University of Rome and Regional Referral Headache Centre, Sant’Andrea Hospital, Rome, Italy
- Department of Radiology, Stroke and Neurovascular Regulation Lab, Harvard Medical School, Massachusetts General Hospital, Boston, MA USA
| | - Martina Fiorillo
- Department of Clinical and Molecular Medicine, Sapienza University of Rome and Regional Referral Headache Centre, Sant’Andrea Hospital, Rome, Italy
| | - Dorian A. Lamis
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA USA
| | - Denise Erbuto
- Department of Neurosciences, Mental Health and Sensory Organs, Suicide Prevention Center, Sant’Andrea Hospital, Sapienza University of Rome, 1035-1039, Via di Grottarossa, 00189 Rome, Italy
| | - Francesco Marsibilio
- Department of Clinical and Molecular Medicine, Sapienza University of Rome and Regional Referral Headache Centre, Sant’Andrea Hospital, Rome, Italy
| | - Andrea Romano
- Division of Neuroradiology, Department of Neuroscience, Sant’Andrea Hospital, Sapienza University of Rome, Rome, Italy
| | - Mario Amore
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Section of Psychiatry, University of Genova, Genova, Italy
| | - Lidia D’Alonzo
- Department of Clinical and Molecular Medicine, Sapienza University of Rome and Regional Referral Headache Centre, Sant’Andrea Hospital, Rome, Italy
| | - Alessandro Bozzao
- Division of Neuroradiology, Department of Neuroscience, Sant’Andrea Hospital, Sapienza University of Rome, Rome, Italy
| | - Paolo Girardi
- Department of Neurosciences, Mental Health and Sensory Organs, Suicide Prevention Center, Sant’Andrea Hospital, Sapienza University of Rome, 1035-1039, Via di Grottarossa, 00189 Rome, Italy
| | - Paolo Martelletti
- Department of Clinical and Molecular Medicine, Sapienza University of Rome and Regional Referral Headache Centre, Sant’Andrea Hospital, Rome, Italy
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Sinclair AJ, Matharu M. Migraine, cerebrovascular disease and the metabolic syndrome. Ann Indian Acad Neurol 2012; 15:S72-7. [PMID: 23024568 PMCID: PMC3444221 DOI: 10.4103/0972-2327.100015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Accepted: 02/09/2012] [Indexed: 11/08/2022] Open
Abstract
Evidence is emerging that migraine is not solely a headache disorder. Observations that ischemic stroke could occur in the setting of a migraine attack, and that migraine headaches could be precipitated by cerebral ischemia, initially highlighted a possibly association between migraine and cerebrovascular disease. More recently, large population-based studies that have demonstrated that migraineurs are at increased risk of stroke outside the setting of a migraine attack have prompted the concept that migraine and cerebrovascular disease are comorbid conditions. Explanations for this association are numerous and widely debated, particularly as the comorbid association does not appear to be confined to the cerebral circulation as cardiovascular and peripheral vascular disease also appear to be comorbid with migraine. A growing body of evidence has also suggested that migraineurs are more likely to be obese, hypertensive, hyperlipidemic and have impaired insulin sensitivity, all features of the metabolic syndrome. The comorbid association between migraine and cerebrovascular disease may consequently be explained by migraineurs having the metabolic syndrome and consequently being at increased risk of cerebrovascular disease. This review will summarise the salient evidence suggesting a comorbid association between migraine, cerebrovascular disease and the metabolic syndrome.
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Affiliation(s)
- Alexandra J Sinclair
- Neurotrauma and Neurodegeneration, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
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Perko D, Pretnar-Oblak J, Žvan B, Zaletel M. Are impaired endothelial function in the posterior cerebral circulation and intact endothelial function in the anterior cerebral and systemic circulation associated with migraine: A post hoc study. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.permed.2012.02.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Richter F, Bauer R, Ebersberger A, Lehmenkühler A, Schaible HG. Enhanced neuronal excitability in adult rat brainstem causes widespread repetitive brainstem depolarizations with cardiovascular consequences. J Cereb Blood Flow Metab 2012; 32:1535-45. [PMID: 22453631 PMCID: PMC3421090 DOI: 10.1038/jcbfm.2012.40] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The brainstem of the adult rat is relatively resistant to spreading depolarization (SD) but after enhancement of excitability SD can be evoked by local application of KCl. In the present experiments, we observed that the enhanced excitability even triggers prolonged periods of repetitive depolarizations (RDs), which elicit significant cardiovascular changes. In contrast to KCl-evoked SDs with amplitudes of ∼24 mV and spreading velocity of 4 mm/min, spontaneous RDs had amplitudes of 7 to 12 mV, propagated up to 30 times faster than KCl-evoked SDs, and depolarized larger brainstem areas including the contralateral side. Similarly as SD, RDs depended on glutamatergic neurotransmission and were blocked by MK-801 or by the calcium channel blocker agatoxin. They depended on sodium channels and were blocked by tetrodotoxin. Functionally, the invasion of RDs into the spinal trigeminal and other nuclei evoked bursts of action potentials, indicating that specific neuronal systems are affected. In fact, during episodes of RDs the blood pressure and the local blood flow at the surface of the brainstem and the cortex increased substantially. Brainstem RDs did not propagate into the cerebral cortex. We propose to consider brainstem RPs as a pathophysiological mechanism whose significance for brainstem disease states should be further explored.
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Affiliation(s)
- Frank Richter
- Institute of Physiology I/Neurophysiology, Jena University Hospital, Friedrich Schiller University Jena, Jena, Germany.
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69
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Kamson DO, Illés Z, Aradi M, Orsi G, Perlaki G, Leél-Őssy E, Erdélyi-Botor S, Pótó L, Trauninger A, Pfund Z. Volumetric comparisons of supratentorial white matter hyperintensities on FLAIR MRI in patients with migraine and multiple sclerosis. J Clin Neurosci 2012; 19:696-701. [DOI: 10.1016/j.jocn.2011.07.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 06/12/2011] [Accepted: 07/16/2011] [Indexed: 11/15/2022]
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Mariotti P, Nociti V, Stefanini MC, Cianfoni A, Veltri S, Ferrantini G, Batocchi AP. Chronic Migraine-Like Headache Caused by a Demyelinating Lesion in the Brain Stem. PAIN MEDICINE 2012; 13:610-2. [DOI: 10.1111/j.1526-4637.2012.01344.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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71
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Kurth T, Chabriat H, Bousser MG. Migraine and stroke: a complex association with clinical implications. Lancet Neurol 2012; 11:92-100. [PMID: 22172624 DOI: 10.1016/s1474-4422(11)70266-6] [Citation(s) in RCA: 171] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Migraine and stroke are two common and heterogeneous neurovascular disorders with complex relations. Data show no firm association between stroke and migraine without aura--by far the most common type of migraine--but a doubling of the risk of ischaemic stroke in people who have migraine with aura. Migraine with aura is characterised by a low brain threshold for cortical spreading depression, the biological substrate of the aura, which can be triggered by many factors, including specific diseases that can by themselves increase the risk of ischaemic stroke. Whether the increased risk of ischaemic stroke applies to migraine with aura as a primary headache disorder or is partly due to migraine with aura secondary to other disorders remains to be elucidated.
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Affiliation(s)
- Tobias Kurth
- Inserm Unit 708-Neuroepidemiology, University of Bordeaux, Bordeaux, France
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Arkink EB, Bleeker EJW, Schmitz N, Schoonman GG, Wu O, Ferrari MD, van Buchem MA, van Osch MJP, Kruit MC. Cerebral perfusion changes in migraineurs: a voxelwise comparison of interictal dynamic susceptibility contrast MRI measurements. Cephalalgia 2012; 32:279-88. [PMID: 22290556 DOI: 10.1177/0333102411435985] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
INTRODUCTION The increased risk of cerebro- and cardiovascular disease in migraineurs may be the consequence of a systemic condition affecting whole body vasculature. At cerebrovascular level, this may be reflected by interictal global or regional cerebral perfusion abnormalities. Whether focal perfusion changes occur during interictal migraine has not been convincingly demonstrated. METHODS We measured brain perfusion with dynamic susceptibility contrast magnetic resonance imaging (DSC-MRI) in 29 interictal female migraineurs (12 migraine with aura (MA), 17 migraine without aura (MO)), and 16 female controls. Perfusion maps were compared between these groups with a voxelwise (p < 0.001, uncorrected, minimum cluster size 20 voxels) and a region-of-interest approach. RESULTS In whole brain voxelwise analyses interictal hyperperfusion was observed in the left medial frontal gyrus in migraineurs and in the inferior and middle temporal gyrus in MO patients, in comparison with controls. Hypoperfusion was seen in the postcentral gyrus and in the inferior temporal gyrus in MA patients and in the inferior frontal gyrus in MO patients. Additional focal sites of hyperperfusion were noted in subgroups based on attack frequency and disease history. Region-of-interest analyses of the pons, hypothalamus, occipital lobe, and cerebellum did not show interictal perfusion differences between migraineurs and controls. CONCLUSIONS We conclude that interictal migraine is characterized by discrete areas of hyper- and hypoperfusion unspecific for migraine pathophysiology and not explaining the increased vulnerability of particular brain regions for cerebrovascular damage.
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Affiliation(s)
- Enrico B Arkink
- Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands.
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Udar kryptogenny – drożny otwór owalny – migrena z aurą: przypadkowa triada czy związek przyczynowo-skutkowy? Część II. Neurol Neurochir Pol 2012; 46:169-75. [DOI: 10.5114/ninp.2012.28260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Gunde E, Blagdon R, Hajek T. White matter hyperintensities: from medical comorbidities to bipolar disorders and back. Ann Med 2011; 43:571-80. [PMID: 21749303 PMCID: PMC4831903 DOI: 10.3109/07853890.2011.595733] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
White matter hyperintensities (WMHs) are among the most replicated neuroimaging findings in studies of patients with bipolar disorders (BD). Despite the high rates of WMHs, their role and etiology in BD are not well understood. WMHs occur in multiple other conditions frequently co-morbid with BD. From the available studies it seems that WMHs are not a primary risk factor/endophenotype for BD. More likely, these lesions indicate the presence of medical co-morbidities with specific links to BD. Furthermore, the etiology of the WMHs in BD may represent different processes depending on age. In certain forms of BD, such as pediatric BD, WMHs may represent co-morbidity with developmental disorders. High frequency of migraine in BD and high prevalence of WMHs in migraine may suggest that a substantial proportion of WMHs in early adulthood to midlife BD subjects may be related to co-morbidity with migraine. Among elderly subjects with BD, or those with late-onset BD, WMHs are likely related to the presence of cardiovascular/metabolic disorders. With further research WMHs may enhance our knowledge about various pathological pathways involved in BD, help in decreasing the etiological heterogeneity of BD, and become useful as markers of severity or subtype of BD.
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Affiliation(s)
- Eva Gunde
- Department of Psychiatry, Dalhousie University , Halifax , Canada
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Perko D, Pretnar-Oblak J, Sabovič M, Zvan B, Zaletel M. Cerebrovascular reactivity to l-arginine in the anterior and posterior cerebral circulation in migraine patients. Acta Neurol Scand 2011; 124:269-74. [PMID: 21198449 DOI: 10.1111/j.1600-0404.2010.01468.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE - Cerebral infarction preferentially affects the posterior cerebral artery distribution in migraine patients. The results obtained from the few known studies that have compared the anterior and posterior cerebral endothelial function are contradictory. To the best of our knowledge, cerebrovascular reactivity to L-arginine (CVR), measured by transcranial Doppler sonography (TCD), has not been previously used to determine the posterior cerebral endothelial function in migraine patients with (MwA) and without aura (MwoA). MATERIALS AND METHODS - Forty migraine patients without comorbidities (20 MwA, 20 MwoA) and 20 healthy subjects were included. By employing strict inclusion criteria, we avoided the possible vascular risk factors. Mean arterial velocity in the middle cerebral artery (MCA) and the posterior cerebral artery (PCA) was measured by TCD before and after infusion of L-arginine, and CVR to L-arginine was then calculated. RESULTS - All migraine patients had lower CVR to L-arginine in PCA (P = 0.002) and similar in MCA (P = 0.29) compared to healthy subjects. This difference was also present in MwA and MwoA compared to healthy subjects (P = 0.003). CONCLUSIONS - Lower CVR to L-arginine in PCA in migraine patients could associate migraine and cerebral infarcts that are more common in the posterior cerebral artery distribution.
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Affiliation(s)
- D Perko
- Department of Neurology Department of Internal Medicine, University Medical Center Ljubljana, Zaloška cesta, Slovenia.
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Bjørk M, Stovner LJ, Hagen K, Sand T. What initiates a migraine attack? Conclusions from four longitudinal studies of quantitative EEG and steady-state visual-evoked potentials in migraineurs. Acta Neurol Scand 2011:56-63. [PMID: 21711258 DOI: 10.1111/j.1600-0404.2011.01545.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Quantitative electroencephalograpic (QEEG) frequency spectra and steady-state visual-evoked potentials (SSVEP) are indicators of corticothalamic excitability (e.g., arousal). Increased interictal excitability is suggested to be an important element in the migraine pathophysiology. In this paper, we summarize our results from four studies of QEEG and SSVEP recordings in migraineurs interictally and in the days before an attack with the intention to shed light on attack-initiating mechanisms. MATERIAL AND METHODS Thirty-two healthy controls, 33 migraineurs without and eight with aura each had three EEGs with photic stimulation on different days. Using the patient headache diaries, we classified the recordings as interictal, preictal, ictal, or post-ictal retrospectively. Interictal recordings were compared pairwise with attack-related EEGs from the same patient as well as with control EEGs. We also correlated clinical variables with the QEEG and SSVEP data. RESULTS Between attacks, we found increased relative theta activity and attenuated medium-frequency photic responses in migraineurs without aura compared with those in controls. Within 36 h before the attack, slow and asymmetric EEG activity developed. Increased trigger sensitivity and photophobia correlated with higher theta power and depressed photic responses. Attack duration, migraine history duration, and pain intensity were associated with EEG slowing. CONCLUSIONS A general tendency toward EEG slowing and depression of photic responses characterized the migraine group. This pattern was also related to increased severity of symptoms. A change in cortical activity occurred within 36 h before attacks. Our results indicate that thalamocortical hypoexcitability is associated with attack initiation and sensory hypersensitivity in migraine.
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Affiliation(s)
- M Bjørk
- Department of Neuroscience, Norwegian University of Science and Technology, Olav Kyrresgate 9, Trondheim, Norway.
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Zhang X, Levy D, Kainz V, Noseda R, Jakubowski M, Burstein R. Activation of central trigeminovascular neurons by cortical spreading depression. Ann Neurol 2011; 69:855-65. [PMID: 21416489 PMCID: PMC3174689 DOI: 10.1002/ana.22329] [Citation(s) in RCA: 280] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2010] [Revised: 10/13/2010] [Accepted: 11/08/2010] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Cortical spreading depression (CSD) has long been implicated in migraine attacks that begin with visual aura. Having shown that a wave of CSD can trigger long-lasting activation of meningeal nociceptors--the first-order neurons of the trigeminovascular pathway thought to underlie migraine headache--we now report that CSD can activate central trigeminovascular neurons in the spinal trigeminal nucleus (C1-2). METHODS Stimulation of the cortex with pinprick or KCl granule was used to induce CSD in anesthetized rats. Neuronal activity was monitored in C1-2 using single-unit recording. RESULTS In 25 trigeminovascular neurons activated by CSD, mean firing rate (spikes/s) increased from 3.6 ± 1.2 before CSD (baseline) to 6.1 ± 1.8 after CSD (p < 0.0001) for a period >13 minutes. Neuronal activity returned to baseline level after 30.0 ± 3.1 minutes in 14 units, and remained elevated for 66.0 ± 8.3 (22-108) minutes through the entire recording period in the other 11 units. Neuronal activation began within 0.9 ± 0.4 (0-2.5) minutes after CSD in 7 neurons located in laminae I-II, or after a latency of 25.1 ± 4.0 (7-75) minutes in 9 neurons located in laminae I-II, and 9 neurons located in laminae III-V. In 27 trigeminovascular neurons not activated by CSD, mean firing rate was 2.0 ± 0.7 at baseline and 1.8 ± 0.7 after CSD. INTERPRETATION We propose that CSD constitutes a nociceptive stimulus capable of activating peripheral and central trigeminovascular neurons that underlie the headache of migraine with aura.
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Affiliation(s)
- XiChun Zhang
- Department of Anesthesia and Critical Care, Beth Israel Deaconess Medical Center
| | - Dan Levy
- Department of Anesthesia and Critical Care, Beth Israel Deaconess Medical Center
| | - Vanessa Kainz
- Department of Anesthesia and Critical Care, Beth Israel Deaconess Medical Center
| | - Rodrigo Noseda
- Department of Anesthesia and Critical Care, Beth Israel Deaconess Medical Center
| | - Moshe Jakubowski
- Department of Anesthesia and Critical Care, Beth Israel Deaconess Medical Center
| | - Rami Burstein
- Department of Anesthesia and Critical Care, Beth Israel Deaconess Medical Center
- Program in Neuroscience, Harvard Medical School,, Boston, MA 02215, USA
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Risk factors of migraine-related brain white matter hyperintensities: an investigation of 186 patients. J Headache Pain 2011; 12:97-103. [PMID: 21331756 PMCID: PMC3056006 DOI: 10.1007/s10194-011-0299-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Accepted: 11/23/2010] [Indexed: 11/03/2022] Open
Abstract
Brain white matter hyperintensities are more prevalent in migraine patients than in the general population, but the pathogenesis and the risk factors of these hyperintensities are not fully elucidated. The authors analyzed the routine clinical data of 186 migraine patients who were referred to the Outpatient Headache Department of the Department of Neurology, Medical School, University of Pécs, Hungary between 2007 and 2009: 58 patients with white matter hyperintensities and 128 patients without white matter hyperintensities on 3 T MRI. Significant associations between the presence of white matter hyperintensities and longer disease duration (14.4 vs. 19.9 years, p = 0.004), higher headache frequency (4.1 vs. 5.5 attacks/month, p = 0.017), hyperhomocysteinemia (incidence of hyperintensity is 9/9 = 100%, p = 0.009) and thyroid gland dysfunction (incidence of hyperintensity is 8/14 = 57.1%, p = 0.038) were found. These data support the theory that both the disease duration and the attack frequency have a key role in the formation of migraine-related brain white matter hyperintensities, but the effects of comorbid diseases may also contribute to the development of the hyperintensities.
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Perko D, Pretnar-Oblak J, Sabovic M, Zvan B, Zaletel M. Endothelium-dependent vasodilatation in migraine patients. Cephalalgia 2011; 31:654-60. [PMID: 21296807 DOI: 10.1177/0333102410390396] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Endothelial dysfunction could be involved in the pathophysiology of migraine. The results obtained from a few studies on endothelial dysfunction in migraine are controversial. We investigated brachial flow-mediated dilatation (FMD), which reflects systemic endothelial dysfunction, in migraine patients without comorbidities. By employing strict inclusion criteria we avoided the possible changes to FMD from confounding factors. METHODS Forty migraine patients without comorbidities (20 with and 20 without aura) and 20 healthy subjects were included. FMD of brachial arteries and carotid intima-media thickness were measured by using standard procedures. RESULTS We did not find any difference in FMD between migraine patients and healthy subjects (p = .96). Also, no differences were found among healthy subjects, migraine patients with aura and without aura (p = .99). CONCLUSION Our study showed that systemic endothelial function is not impaired in migraine patients without comorbidities, neither in those with or without aura. Considering these findings, the investigation of cerebral endothelial function would be useful in a further investigation of the role of endothelial (dys)function in migraine pathophysiology.
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Affiliation(s)
- Denis Perko
- University Medical Center Ljubljana, Department of Neurology, Ljubljana, Slovenia.
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82
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Bigal ME. Migraine and cardiovascular disease. ARQUIVOS DE NEURO-PSIQUIATRIA 2011; 69:122-9. [DOI: 10.1590/s0004-282x2011000100023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2010] [Accepted: 08/09/2010] [Indexed: 11/22/2022]
Abstract
Migraine, especially migraine with aura is an established risk factor for ischemic lesions of the brain. Recent evidence has also linked migraine with and without aura to a broader range of ischemic vascular disorders including angina, myocardial infarction, coronary revascularization, claudication and cardiovascular mortality. The topic is therefore of considerable interest. Accordingly, herein we review the association between migraine and cardiovascular disease. We start by briefly presenting diagnostic criteria for migraine and revising its pathophysiology. We follow by summarizing the evidence on the topic. We then briefly present the results of a recent meta-analysis. We close by highlighting results of a large epidemiological study conducted after the publication of the meta-analysis.
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Affiliation(s)
- Marcelo E. Bigal
- Office of the Chief Medical Officer, USA; Albert Einstein College of Medicine, USA
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Kruit MC, van Buchem MA, Launer LJ, Terwindt GM, Ferrari MD. Migraine is associated with an increased risk of deep white matter lesions, subclinical posterior circulation infarcts and brain iron accumulation: the population-based MRI CAMERA study. Cephalalgia 2011; 30:129-36. [PMID: 19515125 DOI: 10.1111/j.1468-2982.2009.01904.x] [Citation(s) in RCA: 253] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Previous studies have suggested that migraine is a risk factor for brain lesions, but methodological issues hampered drawing definite conclusions. Therefore, we initiated the magnetic resonance imaging (MRI) ‘CAMERA’ (Cerebral Abnormalities in Migraine, an Epidemiological Risk Analysis) study. We summarize our previously published results. A total of 295 migraineurs and 140 controls were randomly selected from a previously diagnosed population-based sample (n = 6039), who underwent an interview, physical examination and a brain MRI scan. Migraineurs, notably those with aura, had higher prevalence of subclinical infarcts in the posterior circulation [odds ratio (OR) 13.7; 95% confidence interval (CI) 1.7, 112]. Female migraineurs were at independent increased risk of white matter lesions (WMLs; OR 2.1; 95% CI 1.0, 4.1), and migraineurs had a higher prevalence of brainstem hyperintense lesions (4.4% vs. 0.7%, P = 0.04). We observed a higher lifetime prevalence of (frequent) syncope and orthostatic insufficiency in migraineurs; future research needs to clarify whether autonomic nervous system dysfunction could explain (part of) the increased risk of WMLs in female migraineurs. Finally, in migraineurs aged < 50 years, compared with controls, we found evidence of increased iron concentrations in putamen (P = 0.02), globus pallidus (P = 0.03) and red nucleus (P = 0.03). Higher risks in those with higher attack frequency or longer disease duration were found consistent with a causal relationship between migraine and lesions. This summary of our population-based data illustrates that migraine is associated with a significantly increased risk of brain lesions. Longitudinal studies are needed to assess whether these lesions are progressive and have relevant (long-term) functional correlates.
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Affiliation(s)
- M C Kruit
- Department of Radiology, Leiden University Medical Centre, Leiden, the Netherlands
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Kurth T, Mohamed S, Maillard P, Zhu YC, Chabriat H, Mazoyer B, Bousser MG, Dufouil C, Tzourio C. Headache, migraine, and structural brain lesions and function: population based Epidemiology of Vascular Ageing-MRI study. BMJ 2011; 342:c7357. [PMID: 21245119 PMCID: PMC3022913 DOI: 10.1136/bmj.c7357] [Citation(s) in RCA: 161] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
OBJECTIVE To evaluate the association of overall and specific headaches with volume of white matter hyperintensities, brain infarcts, and cognition. DESIGN Population based, cross sectional study. SETTING Epidemiology of Vascular Ageing study, Nantes, France. PARTICIPANTS 780 participants (mean age 69, 58.5% women) with detailed headache assessment. MAIN OUTCOME MEASURES Brain scans were evaluated for volume of white matter hyperintensities (by fully automated imaging processing) and for classification of infarcts (by visual reading with a standardised assessment grid). Cognitive function was assessed by a battery of tests including the mini-mental state examination. RESULTS 163 (20.9%) participants reported a history of severe headache and 116 had migraine, of whom 17 (14.7%) reported aura symptoms. An association was found between any history of severe headache and increasing volume of white matter hyperintensities. The adjusted odds ratio of being in the highest third for total volume of white matter hyperintensities was 2.0 (95% confidence interval 1.3 to 3.1, P for trend 0.002) for participants with any history of severe headache when compared with participants without severe headache being in the lowest third. The association pattern was similar for all headache types. Migraine with aura was the only headache type strongly associated with volume of deep white matter hyperintensities (highest third odds ratio 12.4, 1.6 to 99.4, P for trend 0.005) and with brain infarcts (3.4, 1.2 to 9.3). The location of infarcts was predominantly outside the cerebellum and brain stem. Evidence was lacking for cognitive impairment for any headache type with or without brain lesions. CONCLUSIONS In this population based study, any history of severe headache was associated with an increased volume of white matter hyperintensities. Migraine with aura was the only headache type associated with brain infarcts. Evidence that headache of any type by itself or in combination with brain lesions was associated with cognitive impairment was lacking.
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Affiliation(s)
- Tobias Kurth
- INSERM Unit 708--Neuroepidemiology, Paris, France.
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85
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Diener HC, Kurth T. Migraine and Stroke. Stroke 2011. [DOI: 10.1016/b978-1-4160-5478-8.10036-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Vargas MI, Nguyen D, Sztajzel R, Coeytaux A, Becker M, Delavelle J. [Migraine associated with reversible and irreversible vascular lesions]. JOURNAL DE RADIOLOGIE 2010; 91:1320-1322. [PMID: 21242921 DOI: 10.1016/s0221-0363(10)70203-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Holroyd KA, Cottrell CK, O'Donnell FJ, Cordingley GE, Drew JB, Carlson BW, Himawan L. Effect of preventive (beta blocker) treatment, behavioural migraine management, or their combination on outcomes of optimised acute treatment in frequent migraine: randomised controlled trial. BMJ 2010; 341:c4871. [PMID: 20880898 PMCID: PMC2947621 DOI: 10.1136/bmj.c4871] [Citation(s) in RCA: 132] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To determine if the addition of preventive drug treatment (β blocker), brief behavioural migraine management, or their combination improves the outcome of optimised acute treatment in the management of frequent migraine. DESIGN Randomised placebo controlled trial over 16 months from July 2001 to November 2005. SETTING Two outpatient sites in Ohio, USA. PARTICIPANTS 232 adults (mean age 38 years; 79% female) with diagnosis of migraine with or without aura according to International Headache Society classification of headache disorders criteria, who recorded at least three migraines with disability per 30 days (mean 5.5 migraines/30 days), during an optimised run-in of acute treatment. INTERVENTIONS Addition of one of four preventive treatments to optimised acute treatment: β blocker (n=53), matched placebo (n=55), behavioural migraine management plus placebo (n=55), or behavioural migraine management plus β blocker (n=69). MAIN OUTCOME MEASURE The primary outcome was change in migraines/30 days; secondary outcomes included change in migraine days/30 days and change in migraine specific quality of life scores. RESULTS Mixed model analysis showed statistically significant (P≤0.05) differences in outcomes among the four added treatments for both the primary outcome (migraines/30 days) and the two secondary outcomes (change in migraine days/30 days and change in migraine specific quality of life scores). The addition of combined β blocker and behavioural migraine management (-3.3 migraines/30 days, 95% confidence interval -3.2 to -3.5), but not the addition of β blocker alone (-2.1 migraines/30 days, -1.9 to -2.2) or behavioural migraine management alone (-2.2 migraines migraines/30 days, -2.0 to -2.4), improved outcomes compared with optimised acute treatment alone (-2.1 migraines/30 days, -1.9 to -2.2). For a clinically significant (≥50% reduction) in migraines/30 days, the number needed to treat for optimised acute treatment plus combined β blocker and behavioural migraine management was 3.1 compared with optimised acute treatment alone, 2.6 compared with optimised acute treatment plus β blocker, and 3.1 compared with optimised acute treatment plus behavioural migraine management. Results were consistent for the two secondary outcomes, and at both month 10 (the primary endpoint) and month 16. CONCLUSION The addition of combined β blocker plus behavioural migraine management, but not the addition of β blocker alone or behavioural migraine management alone, improved outcomes of optimised acute treatment. Combined β blocker treatment and behavioural migraine management may improve outcomes in the treatment of frequent migraine. TRIAL REGISTRATION Clinical trials NCT00910689.
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Sas K, Párdutz A, Toldi J, Vécsei L. Dementia, stroke and migraine--some common pathological mechanisms. J Neurol Sci 2010; 299:55-65. [PMID: 20828765 DOI: 10.1016/j.jns.2010.08.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Revised: 03/26/2010] [Accepted: 08/02/2010] [Indexed: 01/26/2023]
Abstract
Dementia, stroke and migraine are very common neurological disorders affecting a large percentage of the population, and leading to a high degree of disability. Often, adequate therapy is not available. Although the symptoms, the progression and the outcome differ in these disorders, to some extent they may share some common pathophysiological mechanisms. The genetic background, an energy deficit, and excitotoxicity, vascular and thrombotic properties can influence all three disorders, resulting in a neuronal dysfunction, increased cellular vulnerability, neurodegeneration and ultimately cell death. All these cellular events occur in dementias and stroke, moreover recent studies suggest that, besides a dysfunction, neuronal damage may be an issue in migraine too. One of the most central events in the multiple mechanisms involved in the pathogenesis of these disorders is a metabolic disturbance of certain brain cells. As mitochondria provide the cells with energy, realization of the importance of these organelles in the aetiopathogenesis of several disorders has emerged in recent years. This review surveys the most important features of the pathogenesis of dementia, stroke and migraine from the aspect of mitochondrial malfunction highlighting some of the considerable connections between these neurological disorders.
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Affiliation(s)
- Katalin Sas
- Department of Neurology, University of Szeged, H-6725 Szeged, Semmelweis u. 6., Hungary
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De Reuck J, Paemeleire K, Van Maele G. Stroke in patients with migraine. Neurol Neurochir Pol 2010; 44:118-22. [PMID: 20496281 DOI: 10.1016/s0028-3843(14)60002-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND PURPOSE Migraine with aura (MA) is considered as a risk factor for ischaemic stroke. The present observational retrospective study compares migraine patients admitted for a documented stroke with those presenting focal neurological symptoms and headache without a demonstrable lesion and in which the final diagnosis was a migraine attack with aura. MATERIAL AND METHODS The study included 14 migraine patients with a stroke and 37 without a stroke. The clinical characteristics, the vascular risk factors and the results of the technical examinations were compared. RESULTS Stroke occurred in migraine patients with aura as well as without aura. Classical vascular risk factors were rather rare. Patent foramen ovale (PFO) with or without atrial septum aneurysm appeared to be the main risk factor for stroke in patients with a history of migraine. Infarcts were mainly located in the supratentorial territory of the posterior cerebral circulation. Also some lobar haematomas were observed, but their aetiology remained uncertain. The strokes were generally mildly severe with good outcome. Hyperintense signals in the cerebral white matter and cerebellum, on T2-weighted magnetic resonance imaging, were more frequent in the migraine patients with stroke. CONCLUSIONS The presence of PFO, rather than of MA, appeared to be the main risk factor for stroke patients with migraine. No direct relation between migraine and stroke could be demonstrated.
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Liem MK, Oberstein SAJL, van der Grond J, Ferrari MD, Haan J. CADASIL and migraine: A narrative review. Cephalalgia 2010; 30:1284-9. [DOI: 10.1177/0333102410370870] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is caused by mutations in the NOTCH3 gene and is clinically characterized by recurrent stroke, cognitive decline, psychiatric disturbances and migraine. The prevalence of migraine in CADASIL is slightly higher than in the general population, and the proportion of migraine with aura is much higher. The pathophysiological mechanism that leads to increased aura prevalence in CADASIL is unknown. Possible mechanisms of the excess of migraine with aura are an increased susceptibility to cortical spreading depression (CSD) or a different expression of CSD. It is also possible that the brainstem migraine area is involved in CADASIL. Last, it is possible that the NOTCH3 mutation acts as a migraine aura susceptibility gene by itself. In this narrative review we summarize the literature about migraine in CADASIL, with a special focus on what CADASIL might teach us about the pathophysiology of migraine.
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Affiliation(s)
| | | | | | | | - Joost Haan
- Leiden University Medical Center, Netherlands
- Rijnland Hospital, Netherlands
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92
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Hauge AW, Hougaard A, Olesen J. On the methodology of drug trials in migraine with aura. Cephalalgia 2010; 30:1041-8. [PMID: 20713554 DOI: 10.1177/0333102409359091] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Specific problems occur in clinical treatment trials for migraine with aura that differ from those encountered in treatment trials for migraine without aura. DISCUSSION Based on our experience with four such trials, we point to a number of possible solutions and outline areas for future inquiry. We make recommendations about subject selection; the choice, definition and assessment of outcome measures; optimal treatments in relation to aura and headache; and we provide samples of study report forms used to record occurrence of aura and headache in this population.
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Affiliation(s)
- Anne Werner Hauge
- Danish Headache Center, Department of Neurology, University of Copenhagen, Faculty of Health Sciences, Glostrup Hospital, Glostrup, Denmark.
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93
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Abstract
Migraine attacks with auras are sometimes associated with underlying hereditary or acquired cerebrovascular disorders. A unifying pathophysiological explanation linking migraine to these conditions has been difficult to identify. On the basis of genetic and epidemiological evidence, we suggest that changes in blood vessels, hypoperfusion disorders, and microembolisation can cause neurovascular dysfunction and evoke cortical spreading depression, an event that is widely thought to underlie aura symptoms. In fact, recent experimental data have indicated that focal, mild, and transient ischaemia can trigger cortical spreading depression without an enduring tissue signature. Although migraine with aura has many causes (eg, neuronal network excitability), it seems that migraine and stroke might both be triggered by hypoperfusion and could therefore exist on a continuum of vascular complications in a subset of patients who have these hereditary or acquired comorbid vascular conditions.
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94
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Bigal ME, Kurth T, Santanello N, Buse D, Golden W, Robbins M, Lipton RB. Migraine and cardiovascular disease: a population-based study. Neurology 2010; 74:628-35. [PMID: 20147658 PMCID: PMC3462501 DOI: 10.1212/wnl.0b013e3181d0cc8b] [Citation(s) in RCA: 235] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES Although the relationship between migraine and cardiovascular disease (CVD) has been studied, several questions remain unanswered. Herein we contrast the rate of diagnosed CVD as well as of risk factors for CVD in individuals with migraine with and without aura (MA and MO) and in controls. METHODS In this case-control study, migraineurs (n = 6,102) and controls (n = 5,243) were representative of the adult US population. Headache diagnosis was formally assigned using a validated mailed questionnaire which also obtained details on treatment, comorbidities, and other variables. CVD events were obtained based on self-reported medical diagnosis. Risk factors for CVD and modified Framingham scores were computed. RESULTS In unadjusted analyses, migraine overall and MA were associated with myocardial infarction, stroke, and claudication, and MO was associated with myocardial infarction and claudication. Migraineurs were more likely than controls to have a medical diagnosis of diabetes (12.6% vs 9.4%, odds ratio [OR] 1.4, 95% confidence interval [CI] 1.2-1.6), hypertension (33.1% vs 27.5%, OR 1.4, 95% CI 1.3-1.6), and high cholesterol (32.7% vs 25.6%, OR 1.4, 95% CI 1.3-1.5). Risk was highest in MA, but remained elevated in MO. Framingham scores were significantly higher in MO and MA than in controls. After adjustments (gender, age, disability, treatment, CVD risk factors), migraine remained significantly associated with myocardial infarction (OR 2.2, 95% CI 1.7-2.8), stroke (OR 1.5, 95% CI 1.2-2.1), and claudication (OR 2.69, 95% CI 1.98-3.23). CONCLUSION Both migraine with and without aura are associated with cardiovascular disease (CVD) and with risk factors for CVD. However, since our sample size is large, the clinical relevance of the differences is yet to be established.
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Affiliation(s)
- M E Bigal
- 1 Merck Dr., PO Box 100, Whitehouse Station, NJ 08889-0100, USA.
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95
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Prandota J. The importance of toxoplasma gondii infection in diseases presenting with headaches. Headaches and aseptic meningitis may be manifestations of the Jarisch-Herxheimer reaction. Int J Neurosci 2010; 119:2144-82. [PMID: 19916846 DOI: 10.3109/00207450903149217] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Worldwide, approximately 2 billion people are chronically infected with T. gondii with largely unknown consequences. This review presents clinical symptoms, differential diagnosis, triggering factors, treatment, and pathomechanisms responsible for idiopathic intracranial hypertension, pseudotumor cerebri, and aseptic meningitis. Literature cited in this work illustrates that immune state and other biologic mediator imbalances due to various endogenous and exogenous triggering factors may markedly affect latent central nervous system T. gondii infection/inflammation intensity, and cause reactivation of cerebral toxoplasmosis (CT). Irregularities in pro- and anti-inflammatory processes may markedly disturb the host and/or T. gondii defense mechanisms important for immune control of the parasite thereby manifesting as a wide range of neurologic symptoms and signs observed in some patients with migraine, epilepsy, celiac disease, Henoch-Schönlein purpura, and other brain disorders. This is consistent with reactivation of CT in mice after treatment with dexamethasone associated with depression of type T(H)1 immune response, and development of CT after administration of etanercept or other bioproducts. It seems that various types of headaches, epilepsy, aseptic meningitis, systemic adverse reactions to drugs or other substances represent the Jarisch-Herxheimer reaction due to apoptosis of T. gondii tachyzoites. Also development of some brain tumors, such as ependymoma and glioma may be associated with a chronic course of CT. Thus, all these patients should be tested for T. gondii infection.
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Affiliation(s)
- Joseph Prandota
- Department of Social Pediatrics, Faculty of Public Health, University Medical School, Wroclaw, Poland.
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96
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Pearlman SH, Dodick DW. Therapeutic guidelines for headache. HANDBOOK OF CLINICAL NEUROLOGY 2010; 97:183-194. [PMID: 20816420 DOI: 10.1016/s0072-9752(10)97014-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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97
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Abstract
Subtle clinical cerebellar alterations have been found in migraine. Moreover, abnormalities in visual and motor cortex excitability consistent with a lack of inhibitory efficiency have been described in migraine, and it is known that cerebellum exerts an inhibitory control on cerebral cortex. Here, we investigated if impairment of cerebellar activity on motor cortex, i.e. reduced inhibitory control, can be found in migraine. Ten migraineurs with aura and seven healthy controls underwent a transcranial magnetic stimulation (TMS) protocol to investigate the cerebellar inhibitory drive on motor cortex: a conditioning pulse on right cerebellar cortex was delivered 5, 7, 10, 15 ms before a test stimulus (TS) on contralateral motor cortex. The cerebellar conditioning stimulus inhibits the size of the motor-evoked potential (MEP) produced by the TS alone by approximately 30-50%. Amplitude of MEP to TS alone showed no significant difference between patients and controls. Cerebellar conditioning TMS showed a significant deficit of cerebellar inhibition in migraine patients as compared to controls at all interstimulus intervals (5-15 ms) tested. Cerebellar inhibition is reduced in migraineurs. This could account, at least in part, for the reduced inhibitory efficiency previously showed in cerebral cortex of these patients.
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98
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Jurno ME, Chevtchouk L, Nunes AA, de Rezende DF, Jevoux CDC, de Souza JA, Moreira Filho PF. Ankle-brachial index, a screening for peripheral obstructive arterial disease, and migraine - a controlled study. Headache 2009; 50:626-30. [PMID: 19804400 DOI: 10.1111/j.1526-4610.2009.01536.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Epidemiological studies support the association between migraine, especially migraine with aura, and vascular disorders. The ankle-brachial index (ABI) is largely used as a surrogate of peripheral obstructive arterial disorders (POAD). Accordingly, in this study we contrasted the ABI in individuals with migraine and in controls. METHODS We investigated 50 migraineurs and 38 controls and obtained the ABI (ratio between the systolic arterial pressure obtained in the legs and in the arms) using digital sphygmomanometry. As per validation studies, we used the cut-off of 0.9 as the normal limit for the ABI. We adjusted for gender, use of contraceptive hormones, tabagism, and other cardiovascular risk factors. RESULTS We found abnormal values of ABI, suggestive of mild or moderate POAD, in 31 individuals (35.2%). Mean value was 0.96 (standard deviation = 0.10). None of our patients had ABI < 0.4, which would suggest severe POAD. Mean ABI for migraineurs was 0.94 (0.11), and for controls it was 0.99 (0.09). Difference was significant (t = 2.21 and P = .022). After adjustments, ABI remained significantly associated with migraine status (P = .024). Adjustments were reasonably effective (chi(2) of Hosmer-Lemeshow = 1.06, P = .590). CONCLUSION Our findings suggest that decreased values of ABI are more common in migraineurs than in controls. Although causality was not assessed by us, the relationship is of importance per se. Doctors should measure the ABI in individuals with migraine as an easy way to screen for cardiovascular risk.
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99
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Aurora SK, Barrodale PM, Vermaas AR, Rudra CB. Topiramate modulates excitability of the occipital cortex when measured by transcranial magnetic stimulation. Cephalalgia 2009; 30:648-54. [DOI: 10.1111/j.1468-2982.2009.01998.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Summary The aim of this study was to measure differences in occipital cortex excitability in migraineurs before and after administration of topiramate. We have previously demonstrated occipital cortex hyperexcitability in migraine using an objective technique of magnetic suppression of perceptual accuracy (MSPA). We hypothesized that a neuromodulator such as topiramate would demonstrate differences in MSPA in migraine compared with baseline. Ten migraine patients were recruited. To assess inhibitory function MSPA was measured using the following protocol. Timed transcranial magnetic stimulation were delivered at interstimulus intervals (ISI) varying from 40 to 190 ms (eight stimulations at each ISI) at 60% stimulus intensity. Subjects were asked to report letters projected at a fixed luminance on the screen. Visual suppression was calculated based on the number of errors the subjects made using automated analysis. This procedure was repeated at a minimum of two different dosages of topiramate when it was titrated for optimal migraine control. The interim dose was that at which an improvement in headache frequency was first observed, and the optimal dose was that at which the patient had a ≥ 50% reduction in headache frequency, or had reached a 100-mg dose. The mean [standard error (s.e.)] level of letters reported correct at baseline at 100-ms ISI was 91.6 (3.4) compared with 48.5 (6.0) ( P = 0.001) at an optimal dose of topiramate. Dose ranged from 50 to 100 mg; the average dose was 75 mg. The interim dose for most patients was 50 mg; the mean (s.e.) percentage of letters reported correct at interim was 75.9 (6.2) compared with baseline ( P = 0.01). Mean number of headaches at baseline was 27 per month, compared with eight headaches per month at interim dose and four headaches per month at optimal dose. There was no significant correlation between mean change in frequency of headache and mean change in inhibition from baseline to optimal dose (0.04, P = 0.89). Topiramate modulates occipital cortex excitability in chronic migraine possibly via mechanisms of cortical inhibition. Since there was not a strong correlation between the degree of inhibition and reduction of migraine frequency, it would appear that topiramate did have an independent effect on cortical excitability that was not dependent on reduction in migraine frequency.
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Affiliation(s)
- SK Aurora
- Swedish Headache Center, Seattle, WA, USA
| | | | - AR Vermaas
- Swedish Headache Center, Seattle, WA, USA
| | - CB Rudra
- Swedish Headache Center, Seattle, WA, USA
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100
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Bjørk MH, Stovner LJ, Engstrøm M, Stjern M, Hagen K, Sand T. Interictal quantitative EEG in migraine: a blinded controlled study. J Headache Pain 2009; 10:331-9. [PMID: 19705061 PMCID: PMC3452093 DOI: 10.1007/s10194-009-0140-4] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2009] [Accepted: 07/06/2009] [Indexed: 01/01/2023] Open
Abstract
Abnormal electroencephalography (EEG) in migraineurs has been reported in several studies. However, few have evaluated EEG findings in migraineurs during a time period when neither the last attack nor the next attack may interact with the results. We, therefore, compared interictal EEG in migraineurs and headache-free subjects with a design controlled for interference by pre-ictal changes. Pre-ictal EEG findings in the painful cranial side during the next attack after registration were also investigated. Correlations between clinical variables and EEG are reported as well. Interictal EEGs from 33 migraineurs (6 with and 27 without aura) and 31 controls were compared. Absolute power, asymmetry and relative power were studied for delta, theta and alpha frequency bands in parieto-occipital, temporal and fronto-central areas. EEG variables were correlated to attack frequency, headache duration, attack duration, pain intensity, photo- and phonophobia. Compared with controls, migraineurs had increased relative theta power in all cortical regions and increased delta activity in the painful fronto-central region. Absolute power and asymmetry were similar among groups. In age-adjusted analyses, headache intensity correlated with increased delta activity. In this blinded controlled study, we found globally increased relative theta activity in migraineurs. A slight interictal brain dysfunction is probably present between attacks.
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Affiliation(s)
- Marte Helene Bjørk
- Department of Neuroscience, Norwegian University of Science and Technology (NTNU), MTFS, 7489, Trondheim, Norway.
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