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Rodríguez‐Castro E, Lagorio AN, Bejarano‐García A, Aguiar P, Cortés J, Leira R. Prolonged Migraine Stuttering Aura: Structural, Functional, and Video Neuroimaging Study of an Atypical Migraine Aura. A Case Report. Headache 2020; 60:776-780. [DOI: 10.1111/head.13780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/13/2020] [Accepted: 02/03/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Emilio Rodríguez‐Castro
- Department of Neurology Complejo Hospitalario Universitario de Santiago de Compostela Santiago de Compostela Spain
| | - Ariela N. Lagorio
- Department of Neurology Complejo Hospitalario Universitario de Santiago de Compostela Santiago de Compostela Spain
| | - Alejandro Bejarano‐García
- Department of Nuclear Medicine Complejo Hospitalario Universitario de Santiago de Compostela Santiago de Compostela Spain
| | - Pablo Aguiar
- Department of Nuclear Medicine Complejo Hospitalario Universitario de Santiago de Compostela Santiago de Compostela Spain
- Molecular Imaging Group IDIS Facultad de Medicina Universidad de Santiago de Compostela Santiago de Compostela Spain
| | - Julia Cortés
- Department of Nuclear Medicine Complejo Hospitalario Universitario de Santiago de Compostela Santiago de Compostela Spain
| | - Rogelio Leira
- Department of Neurology Complejo Hospitalario Universitario de Santiago de Compostela Santiago de Compostela Spain
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Chen Z, Chen X, Liu M, Liu M, Ma L, Yu S. Evaluation of gray matter perfusion in episodic migraine using voxel-wise comparison of 3D pseudo-continuous arterial spin labeling. J Headache Pain 2018; 19:36. [PMID: 29796865 PMCID: PMC5966347 DOI: 10.1186/s10194-018-0866-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/10/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Although previous studies have demonstrated that structural and functional abnormalities in episodic migraine (EM), less is known about altered brain perfusion in the EM. The aim of this study is to investigate altered gray matter perfusion in EM using a 3D volumetric perfusion imaging. METHODS Fifteen EM patients and 15 normal controls (NC) underwent structural and 3D pseudo-continuous arterial spin labeling (3D pc-ASL). The structural images were segmented using DARTEL methods and the generated normalized T1 tissue probability maps were used to coregister the cerebral blood flow (CBF) images, which would further be performed with standardization using Fisher Z Transformation. Voxel-wise analysis was applied to CBF map with Z standardization, and the Z value of the abnormal brain region was extracted and performed with correlation with the clinical variables. RESULTS The increased CBF value located in the left Brodmann 38 (BA38) and no significantly decreased CBF value were detected in EM. HAMD scores presented significantly positive correlation with the CBF value of the left BA38. CONCLUSION The current study indicated that the pattern of cerebral hyperperfusion may elucidate the neurogenic mechanism in the EM genesis, and 3D pc-ASL technique would non-invasively provide valuable cerebral perfusion information for the further pathophysiological and neuropsychological study in EM.
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Affiliation(s)
- Zhiye Chen
- Department of Radiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China.,Department of Radiology, Hainan Branch of Chinese PLA General Hospital, Beijing, 100853, China.,Department of Neurology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China
| | - Xiaoyan Chen
- Department of Neurology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China
| | - Mengyu Liu
- Department of Radiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China
| | - Mengqi Liu
- Department of Radiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China.,Department of Radiology, Hainan Branch of Chinese PLA General Hospital, Beijing, 100853, China
| | - Lin Ma
- Department of Radiology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China.
| | - Shengyuan Yu
- Department of Neurology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China.
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Fan EP, Heiber G, Gerard EE, Schuele S. Stroke-like migraine attacks after radiation therapy: A misnomer? Epilepsia 2017; 59:259-268. [PMID: 29171011 DOI: 10.1111/epi.13963] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To understand the frequency of electrographic and clinical seizures in patients with stroke-like migraine attacks after radiation therapy (SMART), and determine whether SMART warrants comprehensive electroencephalographic (EEG) monitoring and aggressive seizure management. METHODS We searched our magnetic resonance brain imaging report database for all patients between January 2013 and December 2015 for suspected SMART syndrome. Clinical inclusion criteria were further applied as follows: inpatient adults (>18 years of age) with history of cranial radiation presenting with acute neurologic deficits as primary admission reason who lacked evidence of recurrent or new brain malignancy, stroke, or infectious agents in cerebrospinal fluid. Six patients were identified. All 6 patients underwent prolonged video EEG monitoring as part of our standard protocol. RESULTS All patients but 1 were found to have multiple or prolonged electrographic seizures consistent with status epilepticus during video EEG monitoring. Their neurological deficit and/or mental status change improved in parallel with resolution of the seizure activity. SIGNIFICANCE SMART is likely a misnomer that underestimates the significance of seizures and status epilepticus in the pathophysiology and clinical presentation of the syndrome. Systematic continuous EEG monitoring and appropriate seizure management is warranted to reduce symptom duration and optimize clinical outcome.
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Affiliation(s)
- Emily Peien Fan
- Department of Neurology, Northwestern Memorial Hospital, Chicago, IL, USA
| | - Gabriel Heiber
- Department of Psychiatry, Northwestern Memorial Hospital, Chicago, IL, USA
| | - Elizabeth E Gerard
- Department of Neurology, Northwestern Memorial Hospital, Chicago, IL, USA
| | - Stephan Schuele
- Department of Neurology, Northwestern Memorial Hospital, Chicago, IL, USA
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Unekawa M, Ikeda K, Tomita Y, Kawakami K, Suzuki N. Enhanced susceptibility to cortical spreading depression in two types of Na +,K +-ATPase α2 subunit-deficient mice as a model of familial hemiplegic migraine 2. Cephalalgia 2017; 38:1515-1524. [PMID: 29041816 DOI: 10.1177/0333102417738249] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Background Patients with familial hemiplegic migraine type 2 (FHM2) have a mutated ATP1A2 gene (encoding Na+,K+-ATPase α2 subunit) and show prolonged migraine aura. Cortical spreading depression (CSD), which involves mass depolarization of neurons and astrocytes that propagates slowly through the gray matter, is profoundly related to aura. Methods In two types of Atp1a2-defective heterozygous mice, Atp1a2tm1Kwk (C-KO) and Atp1a2tm2Kwk (N-KO), the sensitivity and responsiveness to CSD were examined under urethane anesthesia. Results In both cases, heterozygotes exhibited a low threshold for induction of CSD, faster propagation rate, slower recovery from DC deflection, and profound suppression of the electroencephalogram, compared to wild-type mice. A high dose of KCl elicited repeated CSDs for a longer period, with a tendency for a greater frequency of CSD occurrence in heterozygotes. The difference of every endpoint was slightly greater in N-KO than C-KO. Change of regional cerebral blood flow in response to CSD showed no significant difference. Conclusion Heterozygotes of Atp1a2-defective mice simulating FHM2 demonstrated high susceptibility to CSD rather than cortical vasoreactivity, and these effects may differ depending upon the knockout strategy for the gene disruption. These results suggest that patients with FHM2 may exhibit high susceptibility to CSD, resulting in migraine.
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Affiliation(s)
- Miyuki Unekawa
- 1 Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Keiko Ikeda
- 2 Division of Biology, Hyogo College of Medicine, Nishinomiya, Japan.,3 Division of Biology, Center for Molecular Medicine, Jichi Medical School, Shimotsuke, Japan
| | - Yutaka Tomita
- 1 Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Kiyoshi Kawakami
- 3 Division of Biology, Center for Molecular Medicine, Jichi Medical School, Shimotsuke, Japan
| | - Norihiro Suzuki
- 1 Department of Neurology, Keio University School of Medicine, Tokyo, Japan
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Oberndorfer S, Wöber C, Nasel C, Asenbaum S, Lahrmann H, Fueger B, Grisold W. Familial Hemiplegic Migraine: Follow-up Findings of Diffusion-Weighted Magnetic Resonance Imaging (MRI), Perfusion-MRI and [99mTc] HMPAO-SPECT in a Patient with Prolonged Hemiplegic Aura. Cephalalgia 2016; 24:533-9. [PMID: 15196295 DOI: 10.1111/j.1468-2982.2003.00706.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Familial hemiplegic migraine (FHM) is a rare inherited autosomal dominant disorder. Migraine aura may last up to several weeks and then resolve without sequel. We report a 21-year-old male with FHM since the age of 3 years. Diffusion-weighted magnetic resonance imaging (DWI), perfusion-MR imaging (P-MRI) and [99mTc] hexamethyl-propyleneamine-oxime-single photon emission tomography (HMPAO-SPECT) were performed on day 2, when he was somnolent with right-sided hemiplegia, on day 9 when a mild hemiparesis was still present and on day 24 after recovery. The right central region showed normal findings in DWI, whereas P-MRI and SPECT revealed hyperperfusion on day 2, less marked on day 9, and normal findings on day 24. In conclusion, this case report indicates for the first time, by means of SPECT, P-MRI and DWI studies, that even extremely long-lasting migraine aura is not associated with cerebral ischaemia. Therefore, it supports the revised International Headache Society criteria where the term ‘persistent’ aura is proposed.
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Affiliation(s)
- S Oberndorfer
- Neurological Department, Kaiser-Franz-Josef-Spital, University of Vienna, Austria.
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Magis D, Bendtsen L, Goadsby PJ, May A, Rio MSD, Sandór PS, Kaube H, Sandrini G, Schoonman GG, Schoenen J. Evaluation and Proposal for Optimization of Neurophysiological Tests In Migraine: Part 2—Neuroimaging and The Nitroglycerin Test. Cephalalgia 2016; 27:1339-59. [DOI: 10.1111/j.1468-2982.2007.01435.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Neuroimaging methods have been widely used in headache and migraine research. They have provided invaluable information on brain perfusion, metabolism and structure during and outside of migraine attacks, contributing to an improved understanding of the pathophysiology of the disorder. Human models of migraine attacks are indispensable tools in pathophysiological and therapeutic research. This review of neuroimaging methods and the attack-provoking nitroglycerin test is part an initiative by a task force within the EUROHEAD project (EU Strep LSHM-CT-2004-5044837-Workpackage 9) with the objective of critically evaluating neurophysiological tests used in migraine. The first part, presented in a companion paper, is devoted to electrophysiological methods, this second part to neuroimaging methods such as functional magnetic resonance imaging, positron emission tomography and voxel-based morphometry, as well as the nitroglycerin test. For each of these methods, we summarize the results, analyse the methodological limitations and propose recommendations for improved methodology and standardization of research protocols.
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Affiliation(s)
- D Magis
- Headache Research Unit, Department of Neurology, University of Liège, Liège, Belgium
| | - L Bendtsen
- Danish Headache Centre, Department of Neurology, Glostrup Hospital, University of Copenhagen, Copenhagen, Denmark
| | - PJ Goadsby
- Headache Group, Institute of Neurology, London, UK
| | - A May
- Department of Neurology, University of Hamburg, Hamburg, Germany
| | - M Sánchez del Rio
- Department of Neurology, Hospital Ruber Internacional, Madrid, Spain
| | - PS Sandór
- Headache and Pain Unit, Department of Neurology, University Hospital, Zürich, Switzerland
| | - H Kaube
- Headache Group, Institute of Neurology, London, UK
| | - G Sandrini
- University Centre for Adaptive Disorders and Headache, IRCCS C. Mondino Institute of Neurology Foundation, University of Pavia, Pavia, Italy
| | - GG Schoonman
- Department of Neurology, Leiden University Medical Centre, Leiden, the Netherlands
| | - J Schoenen
- Headache Research Unit, Department of Neurology, University of Liège, Liège, Belgium
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Kim YJ, Kwon SU. Recurrent steroid-responsive cerebral vasogenic edema in status migrainosus and persistent aura. Cephalalgia 2014; 35:728-34. [DOI: 10.1177/0333102414553820] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 08/14/2014] [Indexed: 11/16/2022]
Abstract
Background Status migrainosus (SM) and persistent aura (PA) without infarction are complications of migraine. Although several patients have been reported to have reversible brain lesions associated with complications of migraine, their nature and pathophysiology remain unclear. Case We report on a 38-year-old male who presented with nine episodes of SM and PA over eight years. Serial neuroimaging studies including brain magnetic resonance imaging (MRI), blood flow single photon emission tomography (SPECT),18 F-fluorodeoxyglucose positron emission tomography (FDG-PET) and11 C-flumazenil PET (FMZ-PET) demonstrated cerebral vasogenic edema (CVE) with hypoperfusion and hypometabolism in the area, anatomically corresponding to the area with PA. SM and PA were effectively controlled by corticosteroid therapy. Follow-up MRI revealed complete reversibility of the CVE, which was supported by normal FMZ-PET and FDG-PET findings. Conclusion We have described a patient with transient brain lesions associated with complications of migraine who was diagnosed with fully reversible and steroid responsive CVE.
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Affiliation(s)
- Yeon-Jung Kim
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Republic of Korea
| | - Sun U Kwon
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Republic of Korea
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Abstract
Until recently, primary headache disorders, such as migraine and cluster headache were considered to be vascular in origin. However, advances in neuroimaging techniques, such as positron emission tomography, single photon emission computed tomography and functional magnetic resonance imaging have augmented the growing clinical evidence that these headaches are primarily driven from the brain. This review covers functional imaging studies in migraine, cluster headache, rarer headache syndromes and experimental head pain. Together with newer techniques, such as voxel-based morphometry and magnetic resonance spectrometry, functional imaging continues to play a role in elucidating and targeting the neural substrates in each of the primary headache syndromes.
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Affiliation(s)
- Anna S Cohen
- Institute of Neurology, The National Hospital for Neurology and Neurosurgery, Queen Square, London, WC1N 3BG, UK.
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Tashiro Y, Yamazaki T, Nagamine S, Mizuno Y, Yoshiki A, Okamoto K. Repeated encephalopathy and hemicerebral atrophy in a patient with familial hemiplegic migraine type 1. Intern Med 2014; 53:2245-50. [PMID: 25274239 DOI: 10.2169/internalmedicine.53.0295] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We herein describe a case of a 38-year-old man with familial hemiplegic migraine with a T666M mutation in the electrical potential-dependent calcium ion channel (CACNA1A) gene. His migraine was accompanied by hemiparesis and impaired consciousness. Brain magnetic resonance imaging revealed abnormalities in the right cortical hemisphere. Single-photon emission computed tomography demonstrated a decrease in iomazenil uptake and an increase in (99m)Tc-ethyl cysteinate dimer uptake at the ipsilateral site. Positron emission tomography showed a decrease in 18F-fluorodeoxyglucose uptake in the same area, which later showed atrophic changes. The patient's brain atrophy ceased after treatment with sodium valproate. This case suggests that the progression of brain atrophy can be prevented with adequate prophylaxis.
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Affiliation(s)
- Yuichi Tashiro
- Department of Neurology, Gunma University Graduate School of Medicine, Japan
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Topakian R, Pischinger B, Stieglbauer K, Pichler R. Rare clinical findings in a patient with sporadic hemiplegic migraine: FDG-PET provides diminished brain metabolism at 10-year follow-up. Cephalalgia 2013; 34:392-6. [PMID: 24270521 DOI: 10.1177/0333102413513182] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Sporadic hemiplegic migraine (SHM) is defined as migraine attacks associated with some degree of motor weakness during the aura phase and where no first-degree relative has identical attacks. SHM has a wide inter- and intraindividual clinical spectrum and, in case of prolonged aura symptoms and disturbed consciousness, can mimic several other acute neurological diseases. CASE In 1996, during his wedding night, a 28-year-old man developed left face, arm and leg weakness, nausea and a throbbing headache. Neurological examination on presentation revealed stupor, fever, meningism and left hemiplegia. There were no abnormalities on emergency magnetic resonance. Lumbar puncture showed mild lymphocytic pleocytosis and slightly elevated protein. He received symptomatic treatment. Subsequent genetic analysis revealed the T666M mutation in the CACNA1A gene of chromosome 19. He was diagnosed with SHM. In 2005, at the end of another episode of hemiplegic migraine (HM), he for the first time developed an episode of paranoid psychosis with anxiety and visual hallucinations. The psychiatric symptoms resolved within a week. DISCUSSION All perfusion SPECT and transcranial Doppler studies performed in the first days of HM attacks were consistent with hyperemia of the hemisphere contralateral to the neurological signs. FDG-PET/CT in January 2013 revealed a diffusely reduced glucose metabolism of the supratentorial cortex and marked asymmetric hypometabolism of the left cerebellum. The finding of progressive cortical metabolic dysfunction over years appears as a new finding. Glucose hypometabolism may indicate primary neuronal dysfunction as the cause of the prolonged deficits.
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Affiliation(s)
- R Topakian
- Department of Neurology, Wagner-Jauregg Hospital, Austria
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Abstract
Cortical spreading depression (CSD), a slowly propagated wave of depolarization followed by suppression of brain activity, is a remarkably complex event that involves dramatic changes in neural and vascular function. Since its original description in the 1940s, CSD has been hypothesized to be the underlying mechanism of the migraine aura. Substantial evidence from animal models provides indirect support for this hypothesis, and studies showing that CSD is common in humans with brain injury clearly demonstrate that the phenomenon can occur in the human brain. Considerable uncertainty about the role of CSD in migraine remains, however, and key questions about how this event is initiated, how it spreads, and how it might cause migraine symptoms remain unanswered. This Review summarizes current concepts of CSD and its potential roles in migraine, and addresses ongoing studies aimed at a clearer understanding of this fundamental brain phenomenon.
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Affiliation(s)
- Andrew C Charles
- Headache Research and Treatment Program, Department of Neurology, David Geffen School of Medicine at UCLA, Neuroscience Research Building 1, Room 575, 635 Charles Young Drive South, Los Angeles, CA 90095-7335, USA
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Gu T, Ma XX, Xu YH, Xiu JJ, Li CF. Metabolite concentration ratios in thalami of patients with migraine and trigeminal neuralgia measured with1H-MRS. Neurol Res 2013; 30:229-33. [PMID: 17848209 DOI: 10.1179/016164107x235473] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
OBJECTIVE To investigate the metabolite concentration ratios including N-acetylaspartate (NAA), choline-containing compounds (Cho) and creatine plus phosphocreatine (Cr) in thalami of patients with migraine without aura, patients with trigeminal neuralgia and healthy comparison subjects using multi-voxel proton magnetic resonance spectroscopy (1H-MRS). METHODS 1H-MRS was performed with a 3.0 T MR system on the thalamus bilaterally in 20 patients with migraine without aura, 16 patients with trigeminal neuralgia and 14 healthy control subjects. RESULTS In the patients with trigeminal neuralgia, metabolite concentration ratios except for Cho/Cr in thalami were different from those of healthy subjects (p>0.05). In migraine group, only NAA/Cho is low in the left thalamus (p>0.05). Comparing the metabolite concentration ratios of affected and contralateral sides in migraine and trigeminal neuralgia groups, only NAA/Cr showed a significant difference (p>0.05). CONCLUSION It was proved that migraine and trigeminal neuralgia seemed to be associated with an abnormal balance of the neural activity in the thalamus using 1H-MRS. There was some significant difference between metabolite concentration ratios in two diseases. 1H-MRS may serve as a useful non-invasive tool for evaluating thalamic neural activity and therapy effect in clinical performance of patients with migraine without aura.
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Affiliation(s)
- Tao Gu
- Department of Radiology, Qilu Hospital of Shandong University, Jinan 250012, China.
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Abstract
Migraine offers a unique model to understand the consequences of repeated stressors on the brain. Repeated stressors can alter the normal response of physiological systems, and this concept has been termed "allostatic load." In the case of the brain, the effects of repeated stress may lead to alteration in brain networks both functionally and structurally. As a result, the brain responds abnormally to environmental conditions (psychological or physiological). Here, we present an alternative perspective on migraine disease and propose that changes in brain states may occur as a result of repeated migraine attacks through maladaptive coping mechanisms. The cascade of these effects can lead to further deterioration of adaptation and thus lead to transformation or chronification of the disease.
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Affiliation(s)
- Nasim Maleki
- Center for Pain and the Brain, Harvard Medical School, Boston, MA 02453, USA
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Charles A. The evolution of a migraine attack - a review of recent evidence. Headache 2012; 53:413-9. [PMID: 23278169 DOI: 10.1111/head.12026] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/12/2012] [Indexed: 01/07/2023]
Abstract
A migraine attack is an extraordinarily complex brain event that takes place over hours to days. This review focuses on recent human studies that shed light on the evolution of a migraine attack. It begins with a constellation of premonitory symptoms that are associated with activation of the hypothalamus and may involve the neurotransmitter dopamine. Even in the premonitory phase, patients experience sensitivity to sensory stimuli, indicating that central sensitization is a primary phenomenon. The migraine attack progresses to a phase that in some patients includes aura, which involves changes in cortical function, blood flow, and neurovascular coupling. The aura phase overlaps with the headache phase, which is associated with further changes in blood flow and function of the brainstem, thalamus, hypothalamus, and cortex. Serotonin receptors, nitric oxide, calcitonin gene-related peptide, pituitary adenylate cyclase-activating polypeptide, and prostanoids are demonstrated specific chemical mediators of migraine based on therapeutic and triggered migraine studies. A number of migraine symptoms persist beyond resolution of headache into a postdromal phase, accompanied by persistent blood flow changes in several brain regions. Although these phases of migraine have substantial temporal, neurochemical, and anatomical overlap, each represents an important window onto the pathophysiology of migraine as well as a target for therapeutic intervention. A comprehensive approach to migraine requires an understanding of the entire range of mechanisms and resultant symptoms that occur throughout the evolution of an attack.
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Affiliation(s)
- Andrew Charles
- Headache Research and Treatment Program, Department of Neurology, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, CA 90095, USA
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Mourand I, Menjot de Champfleur N, Carra-Dallière C, Le Bars E, Roubertie A, Bonafé A, Thouvenot E. Perfusion-weighted MR imaging in persistent hemiplegic migraine. Neuroradiology 2011; 54:255-60. [DOI: 10.1007/s00234-011-0946-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 07/26/2011] [Indexed: 11/28/2022]
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Hansen JM, Schytz HW, Larsen VA, Iversen HK, Ashina M. Hemiplegic Migraine Aura Begins With Cerebral Hypoperfusion: Imaging in the Acute Phase. Headache 2011; 51:1289-96. [DOI: 10.1111/j.1526-4610.2011.01963.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Enhanced subcortical spreading depression in familial hemiplegic migraine type 1 mutant mice. J Neurosci 2011; 31:5755-63. [PMID: 21490217 DOI: 10.1523/jneurosci.5346-10.2011] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Familial hemiplegic migraine type 1, a monogenic migraine variant with aura, is linked to gain-of-function mutations in the CACNA1A gene encoding Ca(V)2.1 channels. The S218L mutation causes severe channel dysfunction, and paroxysmal migraine attacks can be accompanied by seizures, coma, and hemiplegia; patients expressing the R192Q mutation exhibit hemiplegia only. Familial hemiplegic migraine knock-in mice expressing the S218L or R192Q mutation are highly susceptible to cortical spreading depression, the electrophysiological surrogate for migraine aura, and develop severe and prolonged motor deficits after spreading depression. The S218L mutants also develop coma and seizures and sometimes die. To investigate underlying mechanisms for these symptoms, we used multielectrode electrophysiological recordings, diffusion-weighted magnetic resonance imaging, and c-fos immunohistochemistry to trace spreading depression propagation into subcortical structures. We showed that unlike the wild type, cortical spreading depression readily propagated into subcortical structures in both familial hemiplegic migraine type 1 mutants. Whereas the facilitated subcortical spread appeared limited to the striatum in R192Q, hippocampal and thalamic spread was detected in the S218L mutants with an allele-dosage effect. Both strains exhibited increased susceptibility to subcortical spreading depression and reverberating spreading depression waves. Altogether, these data show that spreading depression propagates between cortex, basal ganglia, diencephalon, and hippocampus in genetically susceptible brains, which could explain the prolonged hemiplegia, coma, and seizure phenotype in this variant of migraine with aura.
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Wang X, Xiang J, Wang Y, Pardos M, Meng L, Huo X, Korostenskaja M, Powers SW, Kabbouche MA, Hershey AD. Identification of abnormal neuromagnetic signatures in the motor cortex of adolescent migraine. Headache 2010; 50:1005-16. [PMID: 20487034 DOI: 10.1111/j.1526-4610.2010.01674.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To investigate the functional abnormalities of the motor cortices in children with migraine using magnetoencephalography (MEG) and a finger-tapping task. BACKGROUND Cortical hyperexcitability has been reported in adults with migraine using MEG. Many children with migraine report difficulty with motor functioning. There is no report on motor-evoked magnetic activation in children with migraine using MEG and the latest signal processing methods. METHODS Ten children with migraine (all female, 9 right-handed and 1 left-handed, aged 13-17 years) and 10 age- and gender-matched healthy children were studied with a 275-channel MEG system. After hearing a unilateral, randomly presented sound cue (500 Hz, 30 milliseconds square tone), each subject immediately performed a brisk index finger tapping with either the right or the left index finger. The auditory stimuli consisted of 200 trials of square tone, 100 trials per ear, randomly distributed. The latency and amplitude of neuromagnetic responses were analyzed with averaged waveforms. Neuromagnetic sources were estimated using synthetic aperture magnetometry (SAM). SAM images were normalized for each participant for group comparison. RESULTS In comparison with healthy children, children with migraine had prolonged latency of motor-evoked magnetic response in the right hemispheres during left finger movement (62.33 +/- 34.55 milliseconds vs 34.9 +/- 17.29 milliseconds, P < .05). In addition, children with migraine had stronger activation in the motor cortex during right finger movement (8097.46 +/- 5168.99 vs 4697.54 +/- 3194.74, P < .05). CONCLUSIONS The results suggest that there are neurophysiological changes in the motor cortices of children with migraine that can be measured with neuromagnetic imaging techniques. The findings expand the ability to study the cerebral mechanisms of migraine using MEG and may facilitate the development of new therapeutic strategies in migraine treatment via alterations in cortical excitability.
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Affiliation(s)
- Xiaoshan Wang
- MEG Center, Department of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
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Guedj E, Belenotti P, Serratrice J, Ene N, Pineau S, Donnet A, Mundler O, Weiller PJ. Partially reversible cortical metabolic dysfunction in familial hemiplegic migraine with prolonged aura. Headache 2010; 50:872-7. [PMID: 20236346 DOI: 10.1111/j.1526-4610.2010.01634.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report a SPECT and PET voxel-based analysis of cerebral blood flow and metabolic rate for glucose in a 23-year-old woman with familial hemiplegic migraine (FHM) caused by ATP1A2 gene mutation. In comparison with healthy subjects, a PET scan showed brain glucose hypometabolism, controlaterally to the hemiplegia, in the perisylvian area early in the attack (Day 1), without any SPECT perfusion abnormalities. Decrease in metabolic rate was only partially reversible at Day 78, concordant at this time with a remaining hemisensory loss. These findings provide further evidence for a primary cortical metabolic dysfunction in FHM.
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Affiliation(s)
- Eric Guedj
- Service Central de Biophysique et de Médecine Nucléaire &, Assistance Publique des Hôpitaux de Marseille, Université de la Méditerranée, INSERM, Marseille, France
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Abstract
Hemiplegic migraine (HM) is characterized by motor weakness and at least one other aura symptom or sign that is fully reversible within 24 hours. While prolonged neurological impairment lasting weeks has been observed, persistent attack-related neurological deficits have not been described. This case illustrates the potential for permanent neurological deficits to occur as a sequelae of HM in the absence of infarction, and highlights potentially important pathophysiological and treatment implications.
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Affiliation(s)
- David Dodick
- Mayo Clinic, Scottsdale-Neurology, Scottsdale, AZ 85259, USA
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21
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Politi M, Papanagiotou P, Grunwald IQ, Reith W. Case 125: hemiplegic migraine. Radiology 2007; 245:600-3. [PMID: 17940312 DOI: 10.1148/radiol.2452041596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Maria Politi
- Clinic for Diagnostic and Interventional Neuroradiology, University Hospital of the Saarland, Kirrbergestr D-66421, Homburg/Saar, Germany.
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22
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Abstract
Until recently, primary headache disorders such as migraine and cluster headache were considered to be vascular in origin. However, advances in neuroimaging techniques, such as positron emission tomography, single photon emission computerized tomography, and functional magnetic resonance imaging, have augmented the growing clinical evidence that these headaches are primarily driven from the brain. This review covers functional imaging studies in migraine, cluster headache, rarer headache syndromes, and experimental head pain. Together with newer techniques, such as voxel-based morphometry and magnetic resonance spectrometry, functional imaging continues to play a role in elucidating and targeting the neural substrates in each of the primary headache syndromes.
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Affiliation(s)
- Anna S Cohen
- Institute of Neurology, Queen Square, London WC1N 3BG, UK
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Spadaro M, Ursu S, Lehmann-Horn F, Veneziano L, Liana V, Antonini G, Giovanni A, Giunti P, Paola G, Frontali M, Jurkat-Rott K. A G301R Na+/K+ -ATPase mutation causes familial hemiplegic migraine type 2 with cerebellar signs. Neurogenetics 2004; 5:177-85. [PMID: 15459825 DOI: 10.1007/s10048-004-0183-2] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2004] [Accepted: 03/10/2004] [Indexed: 11/29/2022]
Abstract
Familial hemiplegic migraine (FHM) is an autosomal dominant subtype of migraine with hemiparesis during the aura. In over 50% of cases the causative gene is CACNA1A (FHM1), which in some cases produces a phenotype with cerebellar signs, including ataxia and nystagmus. Recently, mutations in ATP1A2 on chromosome 1q23 encoding a Na+/K+ -ATPase subunit were identified in four families (FHM2). We now describe an FHM2 pedigree with a fifth ATP1A2 mutation coding for a G301R substitution. The phenotype was particularly severe and included hemiplegic migraine, seizure, prolonged coma, elevated temperature, sensory deficit, and transient or permanent cerebellar signs, such as ataxia, nystagmus, and dysarthria. A mild crossed cerebellar diaschisis during an attack further supported the clinical evidence of a cerebellar deficit. This is the first report suggesting cerebellar involvement in FHM2. A possible role for CACNA1A in producing the phenotype in this family was excluded by linkage studies to the FHM1 locus. The study of this family suggests that the absence of cerebellar signs may not be a reliable indicator to clinically differentiate FHM2 from FHM1.
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Affiliation(s)
- Maria Spadaro
- Department of Neurological Sciences, 1st Medical School, La Sapienza University, Rome, Italy
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25
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Barkley GL. Controversies in neurophysiology. MEG is superior to EEG in localization of interictal epileptiform activity: Pro. Clin Neurophysiol 2004; 115:1001-9. [PMID: 15066523 DOI: 10.1016/j.clinph.2003.12.011] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
UNLABELLED Both EEG and magnetoencephalography (MEG), with a time resolution of 1 ms or less, provide unique neurophysiologic data not obtainable by other neuroimaging techniques. MEG and EEG have often been compared to each other now although the two are complementary. Now that MEG has emerged as a mature clinical technology, it is worthwhile to compare the relative strengths of each for the localization of interictal epileptiform activity and to describe the strengths of MEG relative to EEG in the localization of interictal epileptiform activity. The sources of MEG and EEG signals will first be reviewed. Issues relevant to solving the forward problem and the inverse problem in MEG and EEG will be addressed followed by a comparison of research concerning the detection and localization of interictal epileptiform activity by MEG and EEG. The emphasis will be upon techniques and software routinely used in clinical applications but some emerging areas of MEG research which are entering clinical practice will also be reviewed. SIGNIFICANCE MEG is a new noninvasive neurophysiologic technique which provides unique information for the clinical evaluation of patients with epilepsy, revealing aspects of neuronal function that previously could only be obtained by invasive EEG monitoring, and giving a new window for research of neuronal activity.
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Affiliation(s)
- Gregory L Barkley
- Neuromagnetism Laboratory, Henry Ford Comprehensive Epilepsy Program, Henry Ford Hospital, Detroit, MI 48202, USA.
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Hall SD, Barnes GR, Hillebrand A, Furlong PL, Singh KD, Holliday IE. Spatio-temporal Imaging of Cortical Desynchronization in Migraine Visual Aura: A Magnetoencephalography Case Study. Headache 2004; 44:204-8. [PMID: 15012656 DOI: 10.1111/j.1526-4610.2004.04048.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To determine cortical oscillatory changes involved in migraine visual aura using magnetoencephalography (MEG). BACKGROUND Visual aura in the form of scintillating scotoma precedes migraine in many cases. The involvement of cortical spreading depression within striate and extra-striate cortical areas is implicated in the generation of the disturbance, but the details of its progression, the effects on cortical oscillations, and the mechanisms of aura generation are unclear. METHODS We used MEG to directly image changes in cortical oscillatory power during an episode of scintillating scotoma in a patient who experiences aura without subsequent migraine headache. Using the synthetic aperture magnetometry method of MEG source imaging, focal changes in cortical oscillatory power were observed over a 20-minute period and visualized in coregistration with the patient's magnetic resonance image. RESULTS Alpha band desynchronization in both the left extra-striate and temporal cortex persisted for the duration of reported visual disturbance, terminating abruptly upon disappearance of scintillations. Gamma frequency desynchronization in the left temporal lobe continued for 8 to 10 minutes following the reported end of aura. CONCLUSIONS Observations implicate the extra-striate and temporal cortex in migraine visual aura and suggest involvement of alpha desynchronization in generation of phosphenes and gamma desynchronization in sustained inhibition of visual function.
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Affiliation(s)
- Stephen D Hall
- Wellcome Trust Laboratory for MEG Studies, Neurosciences Research Institute, Aston University, Birmingham, UK
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27
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Abstract
Until recently, primary headache disorders such as migraine and cluster headache were considered to be vascular in origin. However, advances in neuroimaging techniques, such as positron emission tomography, single photon emission computerized tomography, and functional magnetic resonance imaging, have augmented the growing clinical evidence that these headaches are primarily driven from the brain. This review covers functional imaging studies in migraine, cluster headache, rarer headache syndromes, and experimental head pain. Together with newer techniques, such as voxel-based morphometry and magnetic resonance spectrometry, functional imaging continues to play a role in elucidating and targeting the neural substrates in each of the primary headache syndromes.
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Affiliation(s)
- Anna S Cohen
- Institute of Neurology, Queen Square, London WC1N 3BG, UK
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28
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Abstract
Both EEG and magnetoencephalogram (MEG), with a time resolution of 1 ms or less, provide unique neurophysiologic data not obtainable by other neuroimaging techniques. MEG has now emerged as a mature clinical technology. While both EEG and MEG can be performed with more than 100 channels, MEG recordings with 100 to 300 channels are more easily done because of the time needed to apply a large number of EEG electrodes. EEG has the advantage of the long-term video EEG recordings, which facilitates extensive temporal sampling across all periods of the sleep/wake cycle. MEG and EEG seem to complement each other for the detection of interictal epileptiform discharges, because some spikes can be recorded only on MEG but not on EEG and vice versa. Most studies indicate that MEG seems to be more sensitive for neocortical spike sources. Both EEG and MEG source localizations show excellent agreement with invasive electrical recordings, clarify the spatial relationship between the irritative zone and structural lesions, and finally, attribute epileptic activity to lobar subcompartments in temporal lobe and to a lesser extent in extratemporal epilepsies. In temporal lobe epilepsy, EEG and MEG can differentiate between patients with mesial, lateral, and diffuse seizure onsets. MEG selectively detects tangential sources. EEG measures both radial and tangential activity, although the radial components dominate the EEG signals at the scalp. Thus, while EEG provides more comprehensive information, it is more complicated to model due to considerable influences of the shape and conductivity of the volume conductor. Dipole localization techniques favor MEG due to the higher accuracy of MEG source localization compared to EEG when using the standard spherical head shape model. However, if special care is taken to address the above issues and enhance the EEG, the localization accuracy of EEG and MEG actually are comparable, although these surface EEG analytic techniques are not typically approved for clinical use in the United States. MEG dipole analysis is approved for clinical use and thus gives information that otherwise usually requires invasive intracranial EEG monitoring. There are only a few dozen whole head MEG units in operation in the world. While EEG is available in every hospital, specialized EEG laboratories capable of source localization techniques are nearly as scarce as MEG facilities. The combined use of whole-head MEG systems and multichannel EEG in conjunction with advanced source modeling techniques is an area of active development and will allow a better noninvasive characterization of the irritative zone in presurgical epilepsy evaluation. Finally, additional information on epilepsy may be gathered by either MEG or EEG analysis of data beyond the usual bandwidths used in clinical practice, namely by analysis of activity at high frequencies and near-DC activity.
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Affiliation(s)
- Gregory L Barkley
- Neuromagnetism Laboratory, Henry Ford Hospital and Health Science Center, Detroit, Michigan, USA.
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