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Gunduz A, Valls-Solé J, Serranová T, Coppola G, Kofler M, Jääskeläinen SK. The blink reflex and its modulation - Part 2: Pathophysiology and clinical utility. Clin Neurophysiol 2024; 160:75-94. [PMID: 38412746 DOI: 10.1016/j.clinph.2024.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 12/30/2023] [Accepted: 02/06/2024] [Indexed: 02/29/2024]
Abstract
The blink reflex (BR) is integrated at the brainstem; however, it is modulated by inputs from various structures such as the striatum, globus pallidus, substantia nigra, and nucleus raphe magnus but also from afferent input from the peripheral nervous system. Therefore, it provides information about the pathophysiology of numerous peripheral and central nervous system disorders. The BR is a valuable tool for studying the integrity of the trigemino-facial system, the relevant brainstem nuclei, and circuits. At the same time, some neurophysiological techniques applying the BR may indicate abnormalities involving structures rostral to the brainstem that modulate or control the BR circuits. This is a state-of-the-art review of the clinical application of BR modulation; physiology is reviewed in part 1. In this review, we aim to present the role of the BR and techniques related to its modulation in understanding pathophysiological mechanisms of motor control and pain disorders, in which these techniques are diagnostically helpful. Furthermore, some BR techniques may have a predictive value or serve as a basis for follow-up evaluation. BR testing may benefit in the diagnosis of hemifacial spasm, dystonia, functional movement disorders, migraine, orofacial pain, and psychiatric disorders. Although the abnormalities in the integrity of the BR pathway itself may provide information about trigeminal or facial nerve disorders, alterations in BR excitability are found in several disease conditions. BR excitability studies are suitable for understanding the common pathophysiological mechanisms behind various clinical entities, elucidating alterations in top-down inhibitory systems, and allowing for follow-up and quantitation of many neurological syndromes.
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Affiliation(s)
- Aysegul Gunduz
- Istanbul University-Cerrahpasa, Cerrahpasa Faculty of Medicine, Department of Neurology, Division of Neurophysiology, Istanbul, Turkey.
| | - Josep Valls-Solé
- IDIBAPS. Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Villarroel 170 08024, Barcelona, Spain.
| | - Tereza Serranová
- Department of Neurology and Center of Clinical Neuroscience, Charles University, Prague 1st Faculty of Medicine and General University Hospital, Prague, Kateřinská 30, 12800 Prague 2, Czech Republic.
| | - Gianluca Coppola
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino ICOT, via Franco Faggiana 1668 04100, Latina, Italy.
| | - Markus Kofler
- Department of Neurology, Hochzirl Hospital, A-6170 Zirl, Austria.
| | - Satu K Jääskeläinen
- Department of Clinical Neurophysiology, Division of Medical Imaging, Turku University Hospital and University of Turku, Postal Box 52, FIN 20521 Turku, Finland.
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Evers S, Tassorelli C. Migraine with aura. HANDBOOK OF CLINICAL NEUROLOGY 2023; 198:169-186. [PMID: 38043960 DOI: 10.1016/b978-0-12-823356-6.00009-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
This chapter describes the different types of aura including rare aura subtypes such as retinal aura. In addition, aura manifestations not classified in the International Classification of Headache Disorders and auras in headache disorders others than migraine are also described. The differential diagnosis of migraine aura comprises several neurological disorders which should be known to specialists. Migraine aura also has impact on the choice of migraine treatment; recommendations for the treatment of the migraine aura itself are also presented in this chapter.
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Affiliation(s)
- Stefan Evers
- Faculty of Medicine, University of Münster, Münster, Germany; Department of Neurology, Lindenbrunn Hospital, Coppenbrügge, Germany.
| | - Cristina Tassorelli
- Headache Science and Neurorehabilitation Center, IRCCS Mondino Foundation, Pavia, Italy; Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
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Thomsen AV, Sørensen MT, Ashina M, Hougaard A. Symptomatic migraine: A systematic review to establish a clinically important diagnostic entity. Headache 2021; 61:1180-1193. [PMID: 34254302 DOI: 10.1111/head.14187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 01/03/2023]
Abstract
OBJECTIVE To determine if a clinical presentation indistinguishable from migraine can occur due to an underlying condition or pathology, that is, "symptomatic migraine." BACKGROUND It is currently not clear whether migraine truly can be caused by an underlying condition or pathology. Characterization of the etiology and clinical features of possible symptomatic migraine is of significant clinical importance and further may help elucidate the pathophysiology of migraine. METHODS We devised operational diagnostic criteria for "symptomatic migraine" and "possible symptomatic migraine" requiring strong evidence for a causal relation between underlying cause and migraine symptoms adhering strictly to diagnostic criteria. PubMed was searched for case reports of symptomatic migraine from inception to March 2020. Only articles published in English or German were included. No restrictions were placed on study design. Relevant references in the articles were also included. Papers were systematically reviewed by two independent reviewers for detailed clinical features of migraine as well as the proposed underlying conditions and the effects of treatment of these conditions. RESULTS Our search retrieved 1726 items. After screening, 109 papers comprising 504 cases were reviewed in detail. Eleven patients with migraine with aura (MWA) fulfilled our working criteria for symptomatic migraine, and 39 patients fulfilled our criteria for possible symptomatic migraine. The most common etiologies of symptomatic migraine were arteriovenous malformations, carotid stenosis, dissection or aneurysm, brain infarctions, meningioma, and various intra-axial tumors. CONCLUSIONS Symptomatic MWA, indistinguishable from idiopathic MWA, may occur due to cortical lesions or microembolization. We found no clear evidence supporting the existence of symptomatic migraine without aura although we did identify possible cases. Our findings are limited by the available literature, and we suggest that prospective studies are needed.
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Affiliation(s)
- Andreas Vinther Thomsen
- Danish Headache Center, Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, Denmark
| | - Morten Togo Sørensen
- Danish Headache Center, Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, Denmark
| | - Messoud Ashina
- Danish Headache Center, Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, Denmark
| | - Anders Hougaard
- Danish Headache Center, Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, Denmark
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Sex and the serotonergic underpinnings of depression and migraine. HANDBOOK OF CLINICAL NEUROLOGY 2020; 175:117-140. [PMID: 33008520 DOI: 10.1016/b978-0-444-64123-6.00009-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Most psychiatric disorders demonstrate sex differences in their prevalence and symptomatology, and in their response to treatment. These differences are particularly pronounced in mood disorders. Differences in sex hormone levels are among the most overt distinctions between males and females and are thus an intuitive underpinning for these clinical observations. In fact, treatment with estrogen and testosterone was shown to exert antidepressant effects, which underscores this link. Changes to monoaminergic signaling in general, and serotonergic transmission in particular, are understood as central components of depressive pathophysiology. Thus, modulation of the serotonin system may serve as a mechanism via which sex hormones exert their clinical effects in mental health disorders. Over the past 20 years, various experimental approaches have been applied to identify modes of influence of sex and sex hormones on the serotonin system. This chapter provides an overview of different molecular components of the serotonin system, followed by a review of studies performed in animals and in humans with the purpose of elucidating sex hormone effects. Particular emphasis will be placed on studies performed with positron emission tomography, a method that allows for human in vivo molecular imaging and, therefore, assessment of effects in a clinically representative context. The studies addressed in this chapter provide a wealth of information on the interaction between sex, sex hormones, and serotonin in the brain. In general, they offer evidence for the concept that the influence of sex hormones on various components of the serotonin system may serve as an underpinning for the clinical effects these hormones demonstrate.
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Bruti G, Mostardini C, Pierallini A, Villani V, Modini C, Cerbo R. Neurovascular Headache and Occipital Neuralgia Secondary to Bleeding of Bulbocervical Cavernoma. Cephalalgia 2016; 27:1074-9. [PMID: 17645754 DOI: 10.1111/j.1468-2982.2007.01363.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It has recently been suggested that the trigeminocervical complex plays a crucial role in the pathophysiology of neck discomfort that accompanies migraine attacks. Clinical and neurophysiological data have shown that pain within the occipital area may be transmitted by the first trigeminal branch, which supports an anatomical and functional link between cervical and trigeminal modulation of peripheral afferents. We describe a patient with an acute symptomatic migraine attack and chronic occipital neuralgia, both due to bleeding of a bulbocervical cavernoma. The clinical presentation is also discussed and related to recent scientific data on the role of the trigeminocervical complex in both the clinical picture and underlying pathophysiological mechanisms of cervical and head pain.
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Affiliation(s)
- G Bruti
- Headache Unit of Pain Centre Enzo Borzomati, Emergency and Acceptance Department, Azienda Policlinico Umberto I, Rome, Italy.
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Lim ECH, Wilder-Smith EPV, Chong JLM, Wong MC. Seeing the Light: Brainstem Glioma Causing Visual Auras and Migraine. Cephalalgia 2016; 25:154-6. [PMID: 15658954 DOI: 10.1111/j.1468-2982.2004.00833.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E C-H Lim
- Division of Neurology, National University Hospital, Singapore 119074.
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Affiliation(s)
- S N Malik
- Department of Neurology, Jefferson Headache Center, Thomas Jefferson University Hospital, Philadelphia, PA, USA
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Obermann M, Gizewski ER, Limmroth V, Diener HC, Katsarava Z. Symptomatic Migraine and Pontine Vascular Malformation. Cephalalgia 2016; 26:763-6. [PMID: 16686921 DOI: 10.1111/j.1468-2982.2006.01102.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- M Obermann
- Department of Neurology, University Duisburg-Essen, Essen, Germany.
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Coppola G, Di Clemente L, Fumal A, Magis D, De Pasqua V, Pierelli F, Schoenen J. Inhibition of the Nociceptive R2 Blink Reflex after Supraorbital or Index Finger Stimulation is Normal in Migraine Without Aura Between Attacks. Cephalalgia 2016; 27:803-8. [PMID: 17598762 DOI: 10.1111/j.1468-2982.2007.01323.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In order to explore possible interictal brainstem dysfunctions in migraine, we have studied the R2 component of the nociceptive specific blink reflex (nBR) after conditioning by supraorbital or index finger stimuli in 14 untreated migraine without aura patients (MO) between attacks and in 15 healthy volunteers. We determined the R2 recovery curve at increasing inter-stimulus intervals between 50 and 600 ms. The nBR was conditioned by a paired supraorbital stimulus and, in another session, by an ipsilateral electrical shock delivered to the index finger. The R2 nBR recovery curves were normal in MO patients for both the supraorbital and peripheral conditioning. These results do not favour persistent interictal sensitization in the spinal trigeminal sensory system. They also suggest that the control exerted by descending brainstem pathways on medullary R2 interneurones is normal in migraine between attacks.
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Affiliation(s)
- G Coppola
- G.B. Bietti Eye Foundation-IRCCS, Department of Neurophysiology of Vision and Neurophthalmology, Rome, Italy
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Frisardi G, Iani C, Sau G, Frisardi F, Leornadis C, Lumbau A, Enrico P, Sirca D, Staderini EM, Chessa G. A relationship between bruxism and orofacial-dystonia? A trigeminal electrophysiological approach in a case report of pineal cavernoma. Behav Brain Funct 2013; 9:41. [PMID: 24165294 PMCID: PMC3874619 DOI: 10.1186/1744-9081-9-41] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 10/17/2013] [Indexed: 11/10/2022] Open
Abstract
Background In some clinical cases, bruxism may be correlated to central nervous system hyperexcitability, suggesting that bruxism may represent a subclinical form of dystonia. To examine this hypothesis, we performed an electrophysiological evaluation of the excitability of the trigeminal nervous system in a patient affected by pineal cavernoma with pain symptoms in the orofacial region and pronounced bruxism. Methods Electrophysiological studies included bilateral electrical transcranial stimulation of the trigeminal roots, analysis of the jaw jerk reflex, recovery cycle of masseter inhibitory reflex, and a magnetic resonance imaging study of the brain. Results The neuromuscular responses of the left- and right-side bilateral trigeminal motor potentials showed a high degree of symmetry in latency (1.92 ms and 1.96 ms, respectively) and amplitude (11 mV and 11.4 mV, respectively), whereas the jaw jerk reflex amplitude of the right and left masseters was 5.1 mV and 8.9 mV, respectively. The test stimulus for the recovery cycle of masseter inhibitory reflex evoked both silent periods at an interstimulus interval of 150 ms. The duration of the second silent period evoked by the test stimulus was 61 ms and 54 ms on the right and left masseters, respectively, which was greater than that evoked by the conditioning stimulus (39 ms and 35 ms, respectively). Conclusions We found evidence of activation and peripheral sensitization of the nociceptive fibers, the primary and secondary nociceptive neurons in the central nervous system, and the endogenous pain control systems (including both the inhibitory and facilitatory processes), in the tested subject. These data suggest that bruxism and central orofacial pain can coexist, but are two independent symptoms, which may explain why numerous experimental and clinical studies fail to reach unequivocal conclusions.
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Denuelle M, Fabre N. Functional neuroimaging of migraine. Rev Neurol (Paris) 2013; 169:380-9. [PMID: 23602115 DOI: 10.1016/j.neurol.2013.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 01/27/2013] [Accepted: 02/04/2013] [Indexed: 01/07/2023]
Abstract
This review summarizes the history of migraine imaging and key findings of studies on functional neuroimaging in migraine and describes how these data have changed our view of the disorder. Functional neuroimaging during migraine attacks and also interictally has initiated the description of "the migraine brain". These studies have led to the demonstration of cortical spreading depression in migraine with aura, the crucial role for the brainstem during migraine attacks, and cortical hypersensitivity in migraineurs modulated by the trigeminal pathway, explaining sensory sensitization such as photophobia and osmophobia.
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Affiliation(s)
- M Denuelle
- Service de neurologie et d'explorations fonctionnelles neurologiques, hôpital de Rangueil, CHU Toulouse Rangueil, 1, avenue Jean-Poulhès, TSA 50032, 31059 Toulouse cedex 9, France.
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Wang Y, Wang XS. Migraine-like headache from an infarction in the periaqueductal gray area of the midbrain. PAIN MEDICINE 2013; 14:948-9. [PMID: 23565756 DOI: 10.1111/pme.12096] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
In this editorial, we integrate improved understanding of functional and structural brain stem anatomy with lessons learned from other disciplines on brainstem function to provide an alternative interpretation to the data used to support the brainstem migraine generator theory.
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Zhu J, Li JL, Liu YM, Han YY, Wang Y. Unilateral headache with visual aura from a Wallenberg syndrome. CNS Neurosci Ther 2012; 18:598-600. [PMID: 22591373 DOI: 10.1111/j.1755-5949.2012.00330.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Jin Zhu
- Department of Neurology, Epilepsy and Headache Group, the First Hospital of Anhui Medical University, Hefei, China
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Demarquay G, Lothe A, Royet JP, Costes N, Mick G, Mauguière F, Ryvlin P. Brainstem changes in 5-HT1A receptor availability during migraine attack. Cephalalgia 2010; 31:84-94. [PMID: 21036859 DOI: 10.1177/0333102410385581] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Among serotonin receptors, 5-HT(1A) receptors are implicated in the regulation of central serotoninergic tone and could be involved in the abnormal brain 5-HT turnover suspected in migraineurs. The aim of this study was to investigate 5-HT(1A) receptors' availability during migraine attacks. METHODS Ten patients suffering from odor-triggered migraine attacks and 10 control subjects were investigated using positron emission tomography (PET) and [(18)F]MPPF PET tracer, a selective 5-HT(1A) antagonist. All subjects underwent calibrated olfactory stimulations prior to the PET study. RESULTS Four patients developed a migraine attack during the PET study. In these patients, statistical parametrical mapping and region of interest analyses showed an increased [(18)F]MPPF binding potential (BP(ND)) in the pontine raphe when compared to headache-free migraineurs and control subjects. This ictal change was confirmed at the individual level in each of the four affected patients. In comparison with the headache-free migraineurs, patients with a migraine attack also showed significantly increased [(18)F]MPPF BP(ND) in the left orbitofrontal cortex, precentral gyrus and temporal pole. No significant change in [(18)F]MPPF BP(ND) was observed between headache-free migraineurs and controls. CONCLUSIONS Our results emphasize the role of 5HT(1A) receptors in the pontine raphe nuclei during the early stage of migraine attacks.
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Affiliation(s)
- G Demarquay
- Service de Neurologie, Hôpital de la Croix-Rousse France, Lyon, France.
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Olesen J, Burstein R, Ashina M, Tfelt-Hansen P. Origin of pain in migraine: evidence for peripheral sensitisation. Lancet Neurol 2009; 8:679-90. [PMID: 19539239 DOI: 10.1016/s1474-4422(09)70090-0] [Citation(s) in RCA: 412] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Migraine is the most common neurological disorder, and much has been learned about its mechanisms in recent years. However, the origin of painful impulses in the trigeminal nerve is still uncertain. Despite the attention paid recently to the role of central sensitisation in migraine pathophysiology, in our view, neuronal hyperexcitability depends on activation of peripheral nociceptors. Although the onset of a migraine attack might take place in deep-brain structures, some evidence indicates that the headache phase depends on nociceptive input from perivascular sensory nerve terminals. The input from arteries is probably more important than the input from veins. Several studies provide evidence for input from extracranial, dural, and pial arteries but, likewise, there is also evidence against all three of these locations. On balance, afferents are most probably excited in all three territories or the importance of individual territories varies from patient to patient. We suggest that migraine can be explained to patients as a disorder of the brain, and that the headache originates in the sensory fibres that convey pain signals from intracranial and extracranial blood vessels.
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Affiliation(s)
- Jes Olesen
- Danish Headache Center and Department of Neurology, Glostrup Hospital, Faculty of Health Sciences, University of Copenhagen, DK-2600 Glostrup, Copenhagen, Denmark.
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Doi H, Hashimoto S, Kira JI. Transient burning pain in the ipsilateral orbit as an initial manifestation of dorsal pontine hemorrhage: case report. Neurol Med Chir (Tokyo) 2009; 49:206-8. [PMID: 19465791 DOI: 10.2176/nmc.49.206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A 45-year-old man with a past history of hypertension and hyperlipidemia presented with right dorsal pontine hemorrhage manifesting as transient burning pain in the right orbital region, followed by numbness and mild weakness of the left side of the body. Magnetic resonance imaging showed a hyperintense lesion in the right dorsal pons on T(1)-weighted and T(2)-weighted images, but no other abnormalities suggesting vascular lesions in the midbrain, medulla, cerebellum, or cerebrum. These findings were consistent with the subacute stage of small pontine hemorrhage. He was treated to decrease his blood pressure. The symptoms gradually improved and he has suffered neither recurrence of the orbital pain nor migraine for several months after the first episode of headache. The trigeminal nociceptive system in the dorsal lateral pons may be linked to this characteristic pain, as suggested by reports of secondary migraine caused by cavernous hemangioma and arteriovenous malformation, and activation of the dorsal lateral pons during migraine attacks on positron emission tomography.
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Affiliation(s)
- Hikaru Doi
- Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Molecular mechanisms of migraine? J Neurol 2007; 254:1629-35. [PMID: 17987250 DOI: 10.1007/s00415-007-0641-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2006] [Revised: 02/15/2007] [Accepted: 04/17/2007] [Indexed: 12/19/2022]
Abstract
Migraine is a common debilitating neurological disease characterised by attacks of severe headache with or without preceding aura. Its aetiology remains elusive; however it is clear that an interplay of genetic and environmental components play an important role. Familial hemiplegic migraine (FHM) is a rare and severe variant of migraine with aura and follows an autosomal dominant pattern of inheritance. This disease is genetically heterogeneous,with three causative genes having been identified. This review uses insights garnered from FHM to try and shed light on possible migraine disease pathogenesis.
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Schuh-Hofer S, Richter M, Geworski L, Villringer A, Israel H, Wenzel R, Munz DL, Arnold G. Increased serotonin transporter availability in the brainstem of migraineurs. J Neurol 2007; 254:789-96. [PMID: 17351723 DOI: 10.1007/s00415-006-0444-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2006] [Revised: 09/26/2006] [Accepted: 10/18/2006] [Indexed: 10/23/2022]
Abstract
For decades, serotonin has been speculated to play a major role in migraine pathophysiology. The central serotonergic system is located in the raphe nuclei and the adjacent reticular formation in the brainstem. Recently, radioligands targeting the brain serotonin transport protein (SERT) have been developed. We used the highly specific SERT-radioligand (123)I-ADAM [2-((2-((dimethylamino) methyl)phenyl)thio)-5-iodophenylamine] to test the hypothesis of the mesopontine serotonergic system being involved in the pathophysiology of migraine. Nineteen migraine patients and 10 healthy, age- and sex-matched controls were enrolled. The neuroimaging study was performed interictally during the pain-free interval. Single Photon Emission Computed Tomography (SPECT)-images were coregistered with MRI-scans. Region of interest (ROI)-analysis revealed a highly significant increase of (123)I-ADAM uptake in the mesopontine brainstem of migraineurs (p < 0.001). In contrast, (123)IADAM uptake in the thalamus did not differ significantly between migraineurs and controls. Our study demonstrates for the first time a significant increase of brainstem SERT-availability in migraineurs, suggesting a dysregulation of the brainstem serotonergic system. It remains to be elucidated whether the altered SERT-availability is causally related to migraine pathophysiology or whether it reflects secondary pathophysiological mechanisms.
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Affiliation(s)
- Sigrid Schuh-Hofer
- Dept. of Neurology, Charité-Universitätsmedizin Berlin, Berlin, Germany.
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Cannas A, Solla P, Mascia MM, Floris GL, Tacconi P, Uselli S, Ambu R, Marrosu MG. Medulloblastoma induces unusual headache with clinical picture of basilar-type migraine complicated by ischaemic infarcts. Cephalalgia 2006; 26:1238-41. [PMID: 16961793 DOI: 10.1111/j.1468-2982.2006.01176.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A Cannas
- Dipartimento di Scienze Cardiovascolari e Neurologiche, Sez. Neurologia, University of Cagliari, Cagliari, Italy
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Chen SC. Epilepsy and migraine: The dopamine hypotheses. Med Hypotheses 2005; 66:466-72. [PMID: 16298497 DOI: 10.1016/j.mehy.2005.09.045] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2005] [Accepted: 09/27/2005] [Indexed: 11/16/2022]
Abstract
Migraine and epilepsy are both chronic recurrent disorders with paroxysmal attacks. They also share some similar risk factors, symptoms, and preventive medications. Dopamine has long been postulated to be involved in the pathophysiology of migraine and epileptogenesis, by many supporting evidences. However, the role of dopamine is still controversial till now. A lack of a comprehensive hypothetical model may be one of the reasons. "Dopamine hypothesis" is not a new term, but it is proposed to explain the pathophysiology and the associated phenomena of these disorders. The hypotheses suggest that, in migraine, there is a low dopamine tone, while there is a high state of dopamine in generalized epilepsy. But the periodic attacks of headaches and seizures maybe both due to a fall in dopamine activity. Dopamine therefore plays a key role in the linkage of neuroendocrine, autonomic system and neuronal activity. Dopamine agonist is also implied in prophylaxis and neuroprotection in both disorders.
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Affiliation(s)
- Shih-Cheng Chen
- Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, No. 325, Section 2, Cheng-Kung Road, Neihu 114, Taipei, Taiwan, ROC.
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Knight Y. Brainstem Modulation of Caudal Trigeminal Nucleus: A Model for Understanding Migraine Biology and Future Drug Targets. ACTA ACUST UNITED AC 2005. [DOI: 10.1111/j.1743-5013.2005.00019.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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