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de Lahoz ME, Barjola P, Peláez I, Ferrera D, Fernandes-Magalhaes R, Mercado F. Unveiling the Role of Contingent Negative Variation (CNV) in Migraine: A Review of Electrophysiological Studies in Adults and Children. Biomedicines 2023; 11:3030. [PMID: 38002030 PMCID: PMC10669837 DOI: 10.3390/biomedicines11113030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/06/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
Migraine has been considered a chronic neuronal-based pain disorder characterized by the presence of cortical hyperexcitability. The Contingent Negative Variation (CNV) is the most explored electrophysiological index in migraine. However, the findings show inconsistencies regarding its functional significance. To address this, we conducted a review in both adults and children with migraine without aura to gain a deeper understanding of it and to derive clinical implications. The literature search was conducted in the PubMed, SCOPUS and PsycINFO databases until September 2022m and 34 articles were retrieved and considered relevant for further analysis. The main results in adults showed higher CNV amplitudes (with no habituation) in migraine patients. Electrophysiological abnormalities, particularly focused on the early CNV subcomponent (eCNV), were especially prominent a few days before the onset of a migraine attack, normalizing during and after the attack. We also explored various modulatory factors, including pharmacological treatments-CNV amplitude was lower after the intake of drugs targeting neural hyperexcitability-and other factors such as psychological, hormonal or genetic/familial influences on CNV. Although similar patterns were found in children, the evidence is particularly scarce and less consistent, likely due to the brain's maturation process during childhood. As the first review exploring the relationship between CNV and migraine, this study supports the role of the CNV as a potential neural marker for migraine pathophysiology and the prediction of pain attacks. The importance of further exploring the relationship between this neurophysiological index and childhood migraine is critical for identifying potential therapeutic targets for managing migraine symptoms during its development.
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Affiliation(s)
| | | | | | | | | | - Francisco Mercado
- Department of Psychology, School of Health Sciences, Universidad Rey Juan Carlos, 28922 Madrid, Spain; (M.E.d.L.); (P.B.); (I.P.); (D.F.); (R.F.-M.)
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Hsiao FJ, Chen WT, Wu YT, Pan LLH, Wang YF, Chen SP, Lai KL, Coppola G, Wang SJ. Characteristic oscillatory brain networks for predicting patients with chronic migraine. J Headache Pain 2023; 24:139. [PMID: 37848845 PMCID: PMC10583316 DOI: 10.1186/s10194-023-01677-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 10/05/2023] [Indexed: 10/19/2023] Open
Abstract
To determine specific resting-state network patterns underlying alterations in chronic migraine, we employed oscillatory connectivity and machine learning techniques to distinguish patients with chronic migraine from healthy controls and patients with other pain disorders. This cross-sectional study included 350 participants (70 healthy controls, 100 patients with chronic migraine, 40 patients with chronic migraine with comorbid fibromyalgia, 35 patients with fibromyalgia, 30 patients with chronic tension-type headache, and 75 patients with episodic migraine). We collected resting-state magnetoencephalographic data for analysis. Source-based oscillatory connectivity within each network, including the pain-related network, default mode network, sensorimotor network, visual network, and insula to default mode network, was examined to determine intrinsic connectivity across a frequency range of 1-40 Hz. Features were extracted to establish and validate classification models constructed using machine learning algorithms. The findings indicated that oscillatory connectivity revealed brain network abnormalities in patients with chronic migraine compared with healthy controls, and that oscillatory connectivity exhibited distinct patterns between various pain disorders. After the incorporation of network features, the best classification model demonstrated excellent performance in distinguishing patients with chronic migraine from healthy controls, achieving high accuracy on both training and testing datasets (accuracy > 92.6% and area under the curve > 0.93). Moreover, in validation tests, classification models exhibited high accuracy in discriminating patients with chronic migraine from all other groups of patients (accuracy > 75.7% and area under the curve > 0.8). In conclusion, oscillatory synchrony within the pain-related network and default mode network corresponded to altered neurophysiological processes in patients with chronic migraine. Thus, these networks can serve as pivotal signatures in the model for identifying patients with chronic migraine, providing reliable and generalisable results. This approach may facilitate the objective and individualised diagnosis of migraine.
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Affiliation(s)
- Fu-Jung Hsiao
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan.
| | - Wei-Ta Chen
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, 201, Shih Pai Rd Sec 2, Taipei, 11217, Taiwan
- Department of Neurology, Keelung Hospital, Ministry of Health and Welfare, Keelung, Taiwan
| | - Yu-Te Wu
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Li-Ling Hope Pan
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Yen-Feng Wang
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, 201, Shih Pai Rd Sec 2, Taipei, 11217, Taiwan
| | - Shih-Pin Chen
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, 201, Shih Pai Rd Sec 2, Taipei, 11217, Taiwan
| | - Kuan-Lin Lai
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, 201, Shih Pai Rd Sec 2, Taipei, 11217, Taiwan
| | - Gianluca Coppola
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Polo Pontino, Latina, Italy
| | - Shuu-Jiun Wang
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan.
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, 201, Shih Pai Rd Sec 2, Taipei, 11217, Taiwan.
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Sebastianelli G, Casillo F, Abagnale C, Renzo AD, Cioffi E, Parisi V, Lorenzo CD, Fazio F, Petricola F, Mattia C, Serrao M, Schoenen J, Coppola G. Central sensitization mechanisms in chronic migraine with medication overuse headache: a study of thalamocortical activation and lateral cortical inhibition. Cephalalgia 2023; 43:3331024231202240. [PMID: 37795647 DOI: 10.1177/03331024231202240] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
BACKGROUND It is unclear whether cortical hyperexcitability in chronic migraine with medication overuse headache (CM-MOH) is due to increased thalamocortical drive or aberrant cortical inhibitory mechanisms. METHODS Somatosensory evoked potentials (SSEP) were performed by electrical stimulation of the median nerve (M), ulnar nerve (U) and simultaneous stimulation of both nerves (MU) in 27 patients with CM-MOH and, for comparison, in 23 healthy volunteers (HVs) of a comparable age distribution. We calculated the degree of cortical lateral inhibition using the formula: 100 - [MU/(M + U) × 100] and the level of thalamocortical activation by analyzing the high frequency oscillations (HFOs) embedded in parietal N20 median SSEPs. RESULTS Compared to HV, CM-MOH patients showed higher lateral inhibition (CM-MOH 52.2% ± 15.4 vs. HV 40.4% ± 13.3; p = 0.005), which positively correlated with monthly headache days, and greater amplitude of pre-synaptic HFOs (p = 0.010) but normal post-synaptic HFOs (p = 0.122). CONCLUSION Our findings suggest that central neuronal circuits are highly sensitized in CM-MOH patients, at both thalamocortical and cortical levels. The observed changes could be due to the combination of dysfunctional central pain control mechanisms, hypersensitivity and hyperresponsiveness directly linked to the chronic intake of acute migraine drugs.
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Affiliation(s)
- Gabriele Sebastianelli
- Sapienza University of Rome Polo Pontino ICOT, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Francesco Casillo
- Sapienza University of Rome Polo Pontino ICOT, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Chiara Abagnale
- Sapienza University of Rome Polo Pontino ICOT, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | | | - Ettore Cioffi
- Sapienza University of Rome Polo Pontino ICOT, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | | | - Cherubino Di Lorenzo
- Sapienza University of Rome Polo Pontino ICOT, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Federica Fazio
- Specialization School in Medicine and Palliative Care, Sapienza University of Rome Polo Pontino ICOT, Latina, Italy
| | - Fausto Petricola
- Specialization School in Medicine and Palliative Care, Sapienza University of Rome Polo Pontino ICOT, Latina, Italy
| | - Consalvo Mattia
- Specialization School in Medicine and Palliative Care, Sapienza University of Rome Polo Pontino ICOT, Latina, Italy
| | - Mariano Serrao
- Sapienza University of Rome Polo Pontino ICOT, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Jean Schoenen
- CHU de Liège, Neurology, Headache Research Unit, Citadelle Hospital, Liège, Belgium
| | - Gianluca Coppola
- Sapienza University of Rome Polo Pontino ICOT, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
- Specialization School in Medicine and Palliative Care, Sapienza University of Rome Polo Pontino ICOT, Latina, Italy
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Kalita J, Laskar S, Sachan A. Topographic localization of migraine triggers and its association with headache frequency and severity. Clin Neurol Neurosurg 2023; 230:107794. [PMID: 37229952 DOI: 10.1016/j.clineuro.2023.107794] [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: 04/08/2023] [Revised: 05/10/2023] [Accepted: 05/13/2023] [Indexed: 05/27/2023]
Abstract
OBJECTIVE Internal biological rhythm with or without external trigger may precipitate migraine. Classifying exogenous and endogenous triggers to a topographic localization may help in understanding the migraine. We report topographic localization of migraine triggers and its influence on headache frequency and severity. METHODS 588 migraineurs, aged 16-69 years were included. Various endogenous and exogenous triggers were categorized to topographic localization- hypothalamic, pituitary, auditory, visual, somato-sensory, olfactory and gustatory. The relationship of topographic localization of triggers with episodic versus chronic migraine, and moderate versus severe headache were analyzed using univariate followed by multivariate analysis. RESULTS All migraineurs had triggers 584(99.9%) except 4(0.1%) patients. Presence of multiple triggers (99.4%), and combination of both endogenous and exogenous triggers (97.7%) was the rule. On topographic localization, hypothalamic trigger was the commonest (98.1%) followed by visual (84.1%), auditory (82.1%), somatosensory (76.1%), olfactory (26.2%), pituitary (24.1%), and gustatory (6.6%). 98.6% patients had combination of hypothalamic with pituitary triggers. Hypothalamic [Adjusted odds ratio (AOR) 4.50] and auditory triggers (AOR 0.34) independently predicted chronic migraine, and auditory (AOR 0.55) and gustatory (AOR 2.41) triggers predicted severity of headache. CONCLUSION Hypothalamic triggers are the commonest suggesting an innate susceptibility of migraine. Auditory trigger may precipitate frequent and severe headache.
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Affiliation(s)
- Jayantee Kalita
- Department of Neurology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Raebareli Road, Lucknow, Uttar Pradesh 226014, India.
| | - Sanghamitra Laskar
- Department of Neurology, Vardhman Mahavir Medical College & Safdarjung Hospital, New Delhi 110 029, India
| | - Abhishek Sachan
- Department of Neurology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Raebareli Road, Lucknow, Uttar Pradesh 226014, India
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Coppola G, Ambrosini A. What has neurophysiology revealed about migraine and chronic migraine? HANDBOOK OF CLINICAL NEUROLOGY 2023; 198:117-133. [PMID: 38043957 DOI: 10.1016/b978-0-12-823356-6.00003-2] [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
Since the first electroencephalographic recordings obtained by Golla and Winter in 1959, researchers have used a variety of neurophysiological techniques to determine the mechanisms underlying recurrent migraine attacks. Neurophysiological methods have shown that the brain during the interictal phase of an episodic migraine is characterized by a general hyperresponsiveness to sensory stimuli, a malfunction of the monoaminergic brainstem circuits, and by functional alterations of the thalamus and thalamocortical loop. All of these alterations vary plastically during the phases of the migraine cycle and interictally with the days following the attack. Both episodic migraineurs recorded during an attack and chronic migraineurs are characterized by a general increase in the cortical amplitude response to peripheral sensory stimuli; this is an electrophysiological hallmark of a central sensitization process that is further reinforced through medication overuse. Considering the large-scale functional involvement and the main roles played by the brainstem-thalamo-cortical network in selection, elaboration, and learning of relevant sensory information, future research should move from searching for one specific primary site of dysfunction at the macroscopic level, to the chronic, probably genetically determined, molecular dysfunctions at the synaptic level, responsible for short- and long-term learning mechanisms.
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Affiliation(s)
- Gianluca Coppola
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino - I.C.O.T., Latina, Italy
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Zhang X, Wang W, Bai X, Zhang Y, Yuan Z, Tang H, Zhang X, Li Z, Zhang P, Hu Z, Zhang Y, Yu X, Man X, Sui B, Wang Y. Changes in gamma-aminobutyric acid and glutamate/glutamine levels in the right thalamus of patients with episodic and chronic migraine: A proton magnetic resonance spectroscopy study. Headache 2023; 63:104-113. [PMID: 36651572 DOI: 10.1111/head.14449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 10/27/2022] [Accepted: 11/01/2022] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To explore gamma-aminobutyric acid (GABA) and glutamate/glutamine (Glx) levels in the right thalamus of patients with episodic migraine (EM) and chronic migraine (CM) and their effects on the chronification of migraine. BACKGROUND Migraine affects approximately 1 billion people worldwide, with 2.5%-3% of people with EM progressing to CM each year. Magnetic resonance spectroscopy studies have revealed altered GABA and Glx levels in the thalamus of patients with migraine without aura, but these neurometabolic concentrations are underexplored in the thalamus of patients with CM. METHODS In this cross-sectional study, patients with EM and CM were recruited. Mescher-Garwood point resolved spectroscopy sequence was used to acquire neurotransmitter concentrations in the right thalamus of patients with EM and CM and matched healthy controls (HCs). RESULTS A total of 26 patients (EM, n = 11; CM, n = 15) and 16 age- and sex-matched HCs were included in the analysis. There were significantly lower GABA+/Water levels in the right thalamus of the CM group (mean ± standard deviation: 2.27 ± 0.4 [institutional units]) than that of the HC group (2.74 ± 0.4) (p = 0.026; mean difference [MD] = -0.5 [i.u.]), and lower Glx/Cr levels in the EM group (mean ± SD: 0.11 ± < 0.1) than in the HCs (0.13 ± < 0.1) and CM group (0.13 ± < 0.1) (p = 0.023, MD < -0.1, and p = 0.034, MD < -0.1, respectively). The GABA+/Glx ratio was lower in the CM group (mean ± SD: 0.38 ± 0.1) compared to the EM group (0.47 ± 0.1) (p = 0.024; MD = -0.1). The area under the curve for GABA+/Water levels in differentiating patients with CM from HCs was 0.83 (95% confidence interval 0.68, 0.98; p = 0.004). Correlation analyses within the migraine group revealed no significant correlation between metabolite concentration levels and headache characteristics after Bonferroni correction. CONCLUSION Reduced GABA+/Water levels and imbalance of excitation/inhibition in the right thalamus may contribute to migraine chronification.
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Affiliation(s)
- Xueyan Zhang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Wei Wang
- Headache Center, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xiaoyan Bai
- Tiantan Neuroimaging Center of Excellence, China National Clinical Research Center for Neurological Diseases, Beijing, China.,Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yingkui Zhang
- Tiantan Neuroimaging Center of Excellence, China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Ziyu Yuan
- Headache Center, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Hefei Tang
- Headache Center, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xue Zhang
- Tiantan Neuroimaging Center of Excellence, China National Clinical Research Center for Neurological Diseases, Beijing, China.,Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zhiye Li
- Tiantan Neuroimaging Center of Excellence, China National Clinical Research Center for Neurological Diseases, Beijing, China.,Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Peng Zhang
- Headache Center, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zhangxuan Hu
- GE Healthcare, MR Research China, Beijing, China
| | - Yaqing Zhang
- Headache Center, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xueying Yu
- Headache Center, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xue Man
- Headache Center, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Binbin Sui
- Tiantan Neuroimaging Center of Excellence, China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Yonggang Wang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Headache Center, Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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Abbas Abdulhussein M, Alyasseri ZAA, Mohammed HJ, An X. Lack of Habituation in Migraine Patients Based on High-Density EEG Analysis Using the Steady State of Visual Evoked Potential. ENTROPY (BASEL, SWITZERLAND) 2022; 24:1688. [PMID: 36421543 PMCID: PMC9689466 DOI: 10.3390/e24111688] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 11/10/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Migraine is a periodic disorder in which a patient experiences changes in the morphological and functional brain, leading to the abnormal processing of repeated external stimuli in the inter-ictal phase, known as the habituation deficit. This is a significant feature clinically of migraine in both two types with aura or without aura and plays an essential role in studying pathophysiological differences between these two groups. Several studies indicated that the reason for migraine aura is cortical spreading depression (CSD) but did not clarify its impact on migraine without aura and lack of habituation. In this study, 22 migraine patients (MWA, N = 13), (MWoA, N = 9), and healthy controls (HC, N = 19) were the participants. Participants were exposed to the steady state of visual evoked potentials also known as (SSVEP), which are the signals for a natural response to the visual motivation at four Hz or six Hz for 2 s followed by the inter-stimulus interval that varies between 1 and 1.5 s. The order of the temporal frequencies was randomized, and each temporal frequency was shown 100 times. We recorded from 128 customized electrode locations using high-density electroencephalography (HD-EEG) and measured amplitude and habituation for the N1-P1 and P1-N2 from the first to the sixth blocks of 100 sweep features in patients and healthy controls. Using the entropy, a decrease in amplitude and SSVEP N1-P1 habituation between the first and the sixth block appeared in both MWA and MWoA (p = 0.0001, Slope = -0.4643), (p = 0.065, Slope = 0.1483), respectively, compared to HC. For SSVEP P1-N2 between the first and sixth block, it is varied in both MWA (p = 0.0029, Slope = -0.3597) and MWoA (p = 0.027, Slope = 0.2010) compared to HC. Therefore, migraine patients appear amplitude decrease and habituation deficit but with different rates between MWA, and MWoA compared to HCs. Our findings suggest this disparity between MWoA and MWA in the lack of habituation and amplitude decrease in the inter-ictal phase has a close relationship with CSD. In light of the fact that CSD manifests during the inter-ictal phase of migraine with aura, which is when migraine seizures are most likely to occur, multiple researchers have lately reached this conclusion. This investigation led us to the conclusion that CSD during the inter-ictal phase and migraine without aura are associated. In other words, even if previous research has not demonstrated it, CSD is the main contributor to both types of migraine (those with and without aura).
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Affiliation(s)
- Msallam Abbas Abdulhussein
- Department of Biomedical Engineering, College of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Faculty of Computer Science and Mathematics, University of Kufa, Najaf 54001, Iraq
| | - Zaid Abdi Alkareem Alyasseri
- ECE Department, Faculty of Engineering, University of Kufa, Najaf 54001, Iraq
- College of Engineering, University of Warith Al-Anbiyaa, Karbala 63514, Iraq
- Information Technology Research and Development Centre, University of Kufa, Najaf 54001, Iraq
| | - Husam Jasim Mohammed
- Department of Business Administration, College of Administration and Financial Sciences, Imam Ja’afar Al-Sadiq University, Baghdad 10001, Iraq
| | - Xingwei An
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin 300072, China
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Gallardo VJ, Alpuente A, Pozo-Rosich P. Association of a Cyclical Migraine Phenotype With Disease Progression: A One-Year Time Series Analysis. Neurology 2022; 99:e1326-e1334. [PMID: 35953289 DOI: 10.1212/wnl.0000000000200887] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 05/11/2022] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Longitudinal studies assessing cyclic fluctuations of migraine attacks using time-series analysis are scarce. Here we analyze headache frequency fluctuations over a year in a cohort of migraine patients and we then evaluate how this behaviour has an impact on clinical evolution. METHODS Monthly headache frequency was prospectively collected using an eDiary. Prognosis after one year was calculated as the headache frequency change rate after 12 months (HCR-M12) as a dependent variable. Monthly headache time series was decomposed into all the possible sum of sinusoids through a Fast Fourier Transform algorithm (FFT) and the frequencies with the highest power were used to define the patient's cyclic phenotype during one year (patient's number of cycles per year, c/y). Patients with a cyclic phenotype were those with >2 cycles/year. Finally, we studied how this cyclic phenotype was associated to HCR-M12 using Generalized Linear Models (GLM). RESULTS 142 patients were included (85.2% female; mean age 48.0±9.7 years), 50.0% fulfilled IHCD-3 criteria for chronic migraine (CM). After one year, a 50.7% (72/142) of patients changed their initial diagnosis and progression (frequency worsening) was observed in 14.1% (10/71) of episodic migraine (EM) patients. After applying a FFT, 45.1% (64/142) of patients fitted into a cyclic phenotype. In GLM, statistically significant main effects associated to HCR-M12 were the use of preventive therapy (Beta [SE]: 74.1 [34.6]; p=0.034) and cyclic phenotype (Beta [SE]: 158.33 [55.1]; p=0.005). A post-hoc analysis found that EM patients with cyclic phenotype without adequate preventive therapy were statistically significantly associated to progression. CONCLUSIONS Monthly headache frequency data can be fitted by sinusoidal models. Having a cyclic phenotype has an impact on clinical evolution and has been statistically significantly associated to migraine progression after one year. Particularly, EM patients with cyclic phenotype tend to increase their headache frequency over time. Preventive treatment seems to play a fundamental role in modulating this cyclic behaviour, especially in low-frequency EM patients.
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Affiliation(s)
- Victor J Gallardo
- Headache and Neurological Pain Research Group, Vall d'Hebron Research Institute, Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Alicia Alpuente
- Headache and Neurological Pain Research Group, Vall d'Hebron Research Institute, Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain.,Headache Clinic, Neurology Department, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Patricia Pozo-Rosich
- Headache and Neurological Pain Research Group, Vall d'Hebron Research Institute, Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain; .,Headache Clinic, Neurology Department, Vall d'Hebron University Hospital, Barcelona, Spain
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Rattanawong W, Rapoport A, Srikiatkhachorn A. Neurobiology of migraine progression. NEUROBIOLOGY OF PAIN (CAMBRIDGE, MASS.) 2022; 12:100094. [PMID: 35720639 PMCID: PMC9204797 DOI: 10.1016/j.ynpai.2022.100094] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 05/16/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
Chronic migraine is one of the most devastating headache disorders. The estimated prevalence is 1.4-2.2% in the population. The factors which may predispose to the process of migraine progression include high frequency of migraine attacks, medication overuse, comorbid pain syndromes, and obesity. Several studies showed that chronic migraine results in the substantial anatomical and physiological changes in the brain. Despite no clear explanation regarding the pathophysiologic process leading to the progression, certain features such as increased sensory sensitivity, cutaneous allodynia, impaired habituation, identify the neuronal hyperexcitability as the plausible mechanism. In this review, we describe two main mechanisms which can lead to this hyperexcitability. The first is persistent sensitization caused by repetitive and prolonged trigeminal nociceptive activation. This process results in changes in several brain networks related to both pain and non-pain behaviours. The second mechanism is the decrease in endogenous brainstem inhibitory control, hence increasing the excitability of neurons in the trigeminal noceptive system and cerebral cortex. The combination of increased pain matrix connectivity, including hypothalamic hyperactivity and a weak serotonergic system, may contribute to migraine chronification.
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Affiliation(s)
- Wanakorn Rattanawong
- Faculty of Medicine, King Mongkut’s Institute of Technology Ladkrabang, 10520, Thailand
| | - Alan Rapoport
- Department of Neurology, The David Geffen School of Medicine at UCLA, Los Angeles, USA
| | - Anan Srikiatkhachorn
- Faculty of Medicine, King Mongkut’s Institute of Technology Ladkrabang, 10520, Thailand
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Casillo F, Sebastianelli G, Renzo AD, Cioffi E, Parisi V, Lorenzo CD, Serrao M, Coppola G. The monoclonal CGRP-receptor blocking antibody erenumab has different effects on brainstem and cortical sensory-evoked responses. Cephalalgia 2022; 42:1236-1245. [DOI: 10.1177/03331024221103811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objectives It is unclear whether the electrophysiological effects of erenumab, a monoclonal antibody against the calcitonin gene-related peptide receptor, occur only at the periphery of the trigeminal system or centrally and at the cortical level. Methods We prospectively enrolled 20 patients with migraine who had failed at least two preventative treatments. We measured the nociceptive blink reflex and non-noxious somatosensory evoked potentials in all participants. The area under the curve and habituation of the second polysynaptic nociceptive blink reflex component (R2) as well as the amplitude and habituation of somatosensory evoked potentials N20-P25 were measured. Electrophysiological data were collected at baseline (T0), 28 days (T1), and 56 days (T2) before each injection of erenumab (70 mg). Results Erenumab reduced the patients’ mean monthly headache days, headache intensity, and acute medication intake considerably at T1 and T2 (all p < 0.05). The nociceptive blink reflex area under the curve was considerably lower at T1 and T2 than at baseline without changing the habituation slope. At T2, there was a significant increase in the delayed somatosensory evoked potentials amplitude reduction (habituation) but not in the initial cortical activation. Conclusion Our findings showed that erenumab, in addition to its well-known peripheral effects, can induce central effects earlier in the brainstem and later in the cortex. We cannot rule out whether these results are due to a direct effect of erenumab on the central nervous system or an indirect effect secondary to peripheral drug modulation.
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Affiliation(s)
- Francesco Casillo
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Gabriele Sebastianelli
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | | | - Ettore Cioffi
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | | | - Cherubino Di Lorenzo
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Mariano Serrao
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Gianluca Coppola
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
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11
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Sebastianelli G, Abagnale C, Casillo F, Cioffi E, Parisi V, Di Lorenzo C, Serrao M, Porcaro C, Schoenen J, Coppola G. Bimodal sensory integration in migraine: A study of the effect of visual stimulation on somatosensory evoked cortical responses. Cephalalgia 2022; 42:654-662. [PMID: 35166155 DOI: 10.1177/03331024221075073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Merging of sensory information is a crucial process for adapting the behaviour to the environment in all species. It is not known if this multisensory integration might be dysfunctioning interictally in migraine without aura, where sensory stimuli of various modalities are processed abnormally when delivered separately. To investigate this question, we compared the effects of a concomitant visual stimulation on conventional low-frequency somatosensory evoked potentials and embedded high-frequency oscillations between migraine patients and healthy volunteers. METHODS We recorded somatosensory evoked potentials in 19 healthy volunteers and in 19 interictal migraine without aura patients before, during, and 5 min after (T2) simultaneous synchronous pattern-reversal visual stimulation. At each time point, we measured amplitude and habituation of the N20-P25 low-frequency-somatosensory evoked potentials component and maximal peak-to-peak amplitude of early and late bursts of high-frequency oscillations. RESULTS In healthy volunteers, the bimodal stimulation significantly reduced low-frequency-somatosensory evoked potentials habituation and tended to reduce early high-frequency oscillations that reflect thalamocortical activity. By contrast, in migraine without aura patients, bimodal stimulation significantly increased low-frequency-somatosensory evoked potentials habituation and early high-frequency oscillations. At T2, all visual stimulation-induced changes of somatosensory processing had vanished. CONCLUSION These results suggest a malfunctioning multisensory integration process, which could be favoured by an abnormal excitability level of thalamo-cortical loops.
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Affiliation(s)
- Gabriele Sebastianelli
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Chiara Abagnale
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Francesco Casillo
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Ettore Cioffi
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | | | - Cherubino Di Lorenzo
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Mariano Serrao
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Camillo Porcaro
- Department of Neuroscience and Padova Neuroscience Center (PNC), University of Padova, Padova, Italy.,Institute of Cognitive Sciences and Technologies (ISTC) - National Research Council (CNR), Rome, Italy.,Centre for Human Brain Health and School of Psychology, University of Birmingham, Birmingham, UK
| | - Jean Schoenen
- Headache Research Unit, University Department of Neurology CHR, Citadelle Hospital. University of Liège, Liège, Belgium
| | - Gianluca Coppola
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
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12
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Karsan N, Goadsby PJ. Migraine Is More Than Just Headache: Is the Link to Chronic Fatigue and Mood Disorders Simply Due to Shared Biological Systems? Front Hum Neurosci 2021; 15:646692. [PMID: 34149377 PMCID: PMC8209296 DOI: 10.3389/fnhum.2021.646692] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 02/26/2021] [Indexed: 12/12/2022] Open
Abstract
Migraine is a symptomatically heterogeneous condition, of which headache is just one manifestation. Migraine is a disorder of altered sensory thresholding, with hypersensitivity among sufferers to sensory input. Advances in functional neuroimaging have highlighted that several brain areas are involved even prior to pain onset. Clinically, patients can experience symptoms hours to days prior to migraine pain, which can warn of impending headache. These symptoms can include mood and cognitive change, fatigue, and neck discomfort. Some epidemiological studies have suggested that migraine is associated in a bidirectional fashion with other disorders, such as mood disorders and chronic fatigue, as well as with other pain conditions such as fibromyalgia. This review will focus on the literature surrounding alterations in fatigue, mood, and cognition in particular, in association with migraine, and the suggested links to disorders such as chronic fatigue syndrome and depression. We hypothesize that migraine should be considered a neural disorder of brain function, in which alterations in aminergic networks integrating the limbic system with the sensory and homeostatic systems occur early and persist after headache resolution and perhaps interictally. The associations with some of these other disorders may allude to the inherent sensory sensitivity of the migraine brain and shared neurobiology and neurotransmitter systems rather than true co-morbidity.
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Affiliation(s)
- Nazia Karsan
- Headache Group, Wolfson Centre for Age-Related Diseases, Division of Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom.,NIHR-Wellcome Trust King's Clinical Research Facility, SLaM Biomedical Research Centre, King's College Hospital, London, United Kingdom
| | - Peter J Goadsby
- Headache Group, Wolfson Centre for Age-Related Diseases, Division of Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom.,NIHR-Wellcome Trust King's Clinical Research Facility, SLaM Biomedical Research Centre, King's College Hospital, London, United Kingdom.,Department of Neurology, University of California, Los Angeles, Los Angeles, CA, United States
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13
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Sorokina ND, Zherdeva AS, Selitsky GV, Tsagashek AV. [Neurophysiological methods in the assessment of different forms of migraine]. Zh Nevrol Psikhiatr Im S S Korsakova 2021; 121:121-126. [PMID: 34037365 DOI: 10.17116/jnevro2021121041121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The review considers the efficacy of neurophysiological methods for the study of migraine. According to many authors, such neurophysiological methods as analysis of visual and somatosensory evoked potentials, trigeminal evoked potentials are informative for assessing the functional state of trigeminocervical and sensory systems. Analysis of bioelectric activity of the brain is used for differential diagnosis of migraine and epilepsy, evaluation of various forms and types of migraine. Studies with recording and analysis of laser evoked potentials, as well as the effects of transcranial magnetic stimulation, both diagnostic and non-pharmacological rehabilitation effects on pain syndrome, which increases the efficiency and quality of life in migraine, are considered.
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Affiliation(s)
- N D Sorokina
- Evdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia
| | - A S Zherdeva
- Evdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia
| | - G V Selitsky
- Evdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia
| | - A V Tsagashek
- Evdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia
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14
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Roman-Pognuz E, Elmer J, Guyette FX, Poillucci G, Lucangelo U, Berlot G, Manganotti P, Peratoner A, Pellis T, Taccone F, Callaway C. Multimodal Long-Term Predictors of Outcome in Out of Hospital Cardiac Arrest Patients Treated with Targeted Temperature Management at 36 °C. J Clin Med 2021; 10:jcm10061331. [PMID: 33807041 PMCID: PMC8005130 DOI: 10.3390/jcm10061331] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/05/2021] [Accepted: 03/17/2021] [Indexed: 12/22/2022] Open
Abstract
Introduction: Early prediction of long-term outcomes in patients resuscitated after cardiac arrest (CA) is still challenging. Guidelines suggested a multimodal approach combining multiple predictors. We evaluated whether the combination of the electroencephalography (EEG) reactivity, somatosensory evoked potentials (SSEPs) cortical complex and Gray to White matter ratio (GWR) on brain computed tomography (CT) at different temperatures could predict survival and good outcome at hospital discharge and six months after the event. Methods: We performed a retrospective cohort study including consecutive adult, non-traumatic patients resuscitated from out-of-hospital CA who remained comatose on admission to our intensive care unit from 2013 to 2017. We acquired SSEPs and EEGs during the treatment at 36 °C and after rewarming at 37 °C, Gray to white matter ratio (GWR) was calculated on the brain computed tomography scan performed within six hours of the hospital admission. We primarily hypothesized that SSEP was associated with favor-able functional outcome at distance and secondarily that SSEP provides independent information from EEG and CT. Outcomes were evaluated using the Cerebral Performance Category (CPC) scale at six months from discharge. Results: Of 171 resuscitated patients, 75 were excluded due to missing data or uninterpretable neurophysiological findings. EEG reactivity at 37 °C has been shown the best single predictor of good out-come (AUC 0.803) while N20P25 was the best single predictor for survival at each time point. (AUC 0.775 at discharge and AUC 0.747 at six months follow up). The predictive value of a model including EEG reactivity, average GWR, and SSEP N20P25 amplitude was superior (AUC 0.841 for survival and 0.920 for good out-come) to any combination of two tests or any single test. Conclusions: Our study, in which life-sustaining treatments were never suspended, suggests SSEP cortical complex N20P25, after normothermia and off sedation, is a reliable predictor for survival at any time. When SSEP cortical complex N20P25 is added into a model with GWR average and EEG reactivity, the predictivity for good outcome and survival at distance is superior than each single test alone.
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Affiliation(s)
- Erik Roman-Pognuz
- Department of Anesthesia and Intensive Care, Azienda Sanitaria Universitaria Giuliano Isontina, University of Trieste, Strada di Fiume 447, 34100 Trieste, Italy; (U.L.); (G.B.); (A.P.)
- Correspondence: ; Tel.: +39-3394879119
| | - Jonathan Elmer
- Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA; (J.E.); (F.X.G.); (C.C.)
| | - Frank X. Guyette
- Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA; (J.E.); (F.X.G.); (C.C.)
| | - Gabriele Poillucci
- Department of Radiology, Azienda Sanitaria Universitaria Giuliano Isontina, 34128 Trieste, Italy;
| | - Umberto Lucangelo
- Department of Anesthesia and Intensive Care, Azienda Sanitaria Universitaria Giuliano Isontina, University of Trieste, Strada di Fiume 447, 34100 Trieste, Italy; (U.L.); (G.B.); (A.P.)
| | - Giorgio Berlot
- Department of Anesthesia and Intensive Care, Azienda Sanitaria Universitaria Giuliano Isontina, University of Trieste, Strada di Fiume 447, 34100 Trieste, Italy; (U.L.); (G.B.); (A.P.)
| | - Paolo Manganotti
- Department of Neurology, University of Trieste, 34100 Trieste, Italy;
| | - Alberto Peratoner
- Department of Anesthesia and Intensive Care, Azienda Sanitaria Universitaria Giuliano Isontina, University of Trieste, Strada di Fiume 447, 34100 Trieste, Italy; (U.L.); (G.B.); (A.P.)
| | - Tommaso Pellis
- Department of Intensive Care, Azienda Sanitaria Friuli Occidentale Tommaso, 33170 Pordenone, Italy;
| | - Fabio Taccone
- Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070 Bruxelles, Belgium;
| | - Clifton Callaway
- Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA; (J.E.); (F.X.G.); (C.C.)
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15
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Shankar AK, Javali M, Mehta A, Pradeep R, Mahale R, Acharya P, Srinivasa R. Role of High Frequency Oscillations of Somatosensory Evoked Potentials in Deciphering Pathophysiology of Migraine. J Neurosci Rural Pract 2021; 12:12-15. [PMID: 33531754 PMCID: PMC7846343 DOI: 10.1055/s-0040-1716793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background
Habituation deficit is considered as a neurophysiological abnormality among migraineurs in the interictal period. For clear comprehension and clarity about the mechanism underlying habituation in migraine, a sophisticated method, i.e., high frequency oscillations (HFOs) evoked potentials, have been utilized. However, studies pertaining to this in the Indian context are rare.
Objective
The aim of the study is to determine the utility of HFO of somatosensory evoked potential (SSEP) in deciphering the pathophysiology of migraine.
Materials and Methods
Sixty subjects including 30 migraineurs in the interictal period and 30 healthy controls were considered for the study. Median nerve SSEP was recorded in patients and controls by standard protocols. HFO was extracted offline using the Digital zero-phase shift band-pass filtering at 450 and 750 Hz. The early and late HFOs were determined with respect to the N20 peak and were compared between the groups.
Results
Of total 30 migraineurs, 18 had hemicranial headache and 12 had holocranial headache. N20 latency, P25 latency, N20 onset to peak amplitude, and N20 onset to P25 amplitude were comparable in migraineurs and controls. The intraburst frequency of early HFOs in migraineurs was significantly higher (
p
= 0.04), whereas the peak-to-peak amplitude was significantly lower (
p
= 0.001).
Conclusion
Early HFOs on SSEP represent the thalamocortical excitatory drive in migraineurs. Overall, the study reports that reduced amplitude of early HFOs in the interictal period suggest reduced thalamocortical drive in migraineurs.
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Affiliation(s)
- Abhinandan K Shankar
- Department of neurology, MS Ramaiah Medical College & Hospital, Bengaluru, Karnataka, India
| | - Mahendra Javali
- Department of neurology, MS Ramaiah Medical College & Hospital, Bengaluru, Karnataka, India
| | - Anish Mehta
- Department of neurology, MS Ramaiah Medical College & Hospital, Bengaluru, Karnataka, India
| | - R Pradeep
- Department of neurology, MS Ramaiah Medical College & Hospital, Bengaluru, Karnataka, India
| | - Rohan Mahale
- Department of neurology, MS Ramaiah Medical College & Hospital, Bengaluru, Karnataka, India
| | - Purushottam Acharya
- Department of neurology, MS Ramaiah Medical College & Hospital, Bengaluru, Karnataka, India
| | - Rangasetty Srinivasa
- Department of neurology, MS Ramaiah Medical College & Hospital, Bengaluru, Karnataka, India
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16
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Pozo-Rosich P, Coppola G, Pascual J, Schwedt TJ. How does the brain change in chronic migraine? Developing disease biomarkers. Cephalalgia 2020; 41:613-630. [PMID: 33291995 DOI: 10.1177/0333102420974359] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Validated chronic migraine biomarkers could improve diagnostic, prognostic, and predictive abilities for clinicians and researchers, as well as increase knowledge on migraine pathophysiology. OBJECTIVE The objective of this narrative review is to summarise and interpret the published literature regarding the current state of development of chronic migraine biomarkers. FINDINGS Data from functional and structural imaging, neurophysiological, and biochemical studies have been utilised towards the development of chronic migraine biomarkers. These biomarkers could contribute to chronic migraine classification/diagnosis, prognosticating patient outcomes, predicting response to treatment, and measuring treatment responses early after initiation. Results show promise for using measures of brain structure and function, evoked potentials, and sensory neuropeptide concentrations for the development of chronic migraine biomarkers, yet further optimisation and validation are still required. CONCLUSIONS Imaging, neurophysiological, and biochemical changes that occur with the progression from episodic to chronic migraine could be utilised for developing chronic migraine biomarkers that might assist with diagnosis, prognosticating individual patient outcomes, and predicting responses to migraine therapies. Ultimately, validated biomarkers could move us closer to being able to practice precision medicine in the field and thus improve patient care.
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Affiliation(s)
- Patricia Pozo-Rosich
- Headache Unit, Neurology Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain.,Headache Research Group, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Gianluca Coppola
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Julio Pascual
- University of Cantabria and Service of Neurology, University Hospital Marqués de Valdecilla and IDIVAL, Santander, Spain
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17
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Porcaro C, Di Renzo A, Tinelli E, Di Lorenzo G, Parisi V, Caramia F, Fiorelli M, Di Piero V, Pierelli F, Coppola G. Haemodynamic activity characterization of resting state networks by fractal analysis and thalamocortical morphofunctional integrity in chronic migraine. J Headache Pain 2020; 21:112. [PMID: 32928129 PMCID: PMC7490862 DOI: 10.1186/s10194-020-01181-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 09/08/2020] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Chronic migraine (CM) can be associated with aberrant long-range connectivity of MRI-derived resting-state networks (RSNs). Here, we investigated how the fractal dimension (FD) of blood oxygenation level dependent (BOLD) activity may be used to estimate the complexity of RSNs, reflecting flexibility and/or efficiency in information processing in CM patients respect to healthy controls (HC). METHODS Resting-state MRI data were collected from 20 untreated CM without history of medication overuse and 20 HC. On both groups, we estimated the Higuchi's FD. On the same subjects, fractional anisotropy (FA) and mean diffusivity (MD) values of bilateral thalami were retrieved from diffusion tensor imaging and correlated with the FD values. RESULTS CM showed higher FD values within dorsal attention system (DAS) and the anterior part of default-mode network (DMN), and lower FD values within the posterior DMN compared to HC. Although FA and MD were within the range of normality, both correlated with the FD values of DAS. CONCLUSIONS FD of DAS and DMN may reflect disruption of cognitive control of pain in CM. Since the normal microstructure of the thalamus and its positive connectivity with the cortical networking found in our CM patients reminds similar results obtained assessing the same structures but with the methods of neurophysiology, in episodic migraine during an attack, this may be yet another evidence in supporting CM as a never-ending migraine attack.
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Affiliation(s)
- Camillo Porcaro
- Institute of Cognitive Sciences and Technologies (ISTC), National Research Council (CNR), Via Palestro 32, I-00185, Rome, Italy.
- Centre for Human Brain Health and School of Psychology, University of Birmingham, Birmingham, UK.
- S. Anna Institute and Research in Advanced Neurorehabilitation (RAN), Crotone, Italy.
- Department of Information Engineering, Università Politecnica delle Marche, Ancona, Italy.
- Research Center for Motor Control and Neuroplasticity, KU Leuven, Leuven, Belgium.
| | | | - Emanuele Tinelli
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Giorgio Di Lorenzo
- Laboratory of Psychophysiology and Cognitive Neuroscience, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
- IRCCS Fondazione Santa Lucia, Rome, Italy
| | | | - Francesca Caramia
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Marco Fiorelli
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Vittorio Di Piero
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Francesco Pierelli
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Latina, Italy
- IRCCS - Neuromed, Pozzilli, (IS), Italy
| | - Gianluca Coppola
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Latina, Italy
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18
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The visual system as target of non-invasive brain stimulation for migraine treatment: Current insights and future challenges. PROGRESS IN BRAIN RESEARCH 2020. [PMID: 33008507 DOI: 10.1016/bs.pbr.2020.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
The visual network is crucially implicated in the pathophysiology of migraine. Several lines of evidence indicate that migraine is characterized by an altered visual cortex excitability both during and between attacks. Visual symptoms, the most common clinical manifestation of migraine aura, are likely the result of cortical spreading depression originating from the extrastriate area V3A. Photophobia, a clinical hallmark of migraine, is linked to an abnormal sensory processing of the thalamus which is converged with the non-image forming visual pathway. Finally, visual snow is an increasingly recognized persistent visual phenomenon in migraine, possibly caused by increased perception of subthreshold visual stimuli. Emerging research in non-invasive brain stimulation (NIBS) has vastly developed into a diversity of areas with promising potential. One of its clinical applications is the single-pulse transcranial magnetic stimulation (sTMS) applied over the occipital cortex which has been approved for treating migraine with aura, albeit limited evidence. Studies have also investigated other NIBS techniques, such as repetitive TMS (rTMS) and transcranial direct current stimulation (tDCS), for migraine prophylaxis but with conflicting results. As a dynamic brain disorder with widespread pathophysiology, targeting migraine with NIBS is challenging. Furthermore, unlike the motor cortex, evidence suggests that the visual cortex may be less plastic. Controversy exists as to whether the same fundamental principles of NIBS, based mainly on findings in the motor cortex, can be applied to the visual cortex. This review aims to explore existing literature surrounding NIBS studies on the visual system of migraine. We will first provide an overview highlighting the direct implication of the visual network in migraine. Next, we will focus on the rationale behind using NIBS for migraine treatment, including its effects on the visual cortex, and the shortcomings of currently available evidence. Finally, we propose a broader perspective of how novel approaches, the concept of brain networks and the integration of multimodal imaging with computational modeling, can help refine current NIBS methods, with the ultimate goal of optimizing a more individualized treatment for migraine.
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19
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Lisicki M, D'Ostilio K, Coppola G, Nonis R, Maertens de Noordhout A, Parisi V, Magis D, Schoenen J. Headache Related Alterations of Visual Processing in Migraine Patients. THE JOURNAL OF PAIN 2020; 21:593-602. [DOI: 10.1016/j.jpain.2019.08.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 07/12/2019] [Accepted: 08/07/2019] [Indexed: 01/12/2023]
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20
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Torres-Ferrús M, Ursitti F, Alpuente-Ruiz A, Brunello F, Chiappino D, de Vries T, Di Marco S, Ferlisi S, Guerritore L, Gonzalez-Garcia N, Gonzalez-Martinez A, Khutorov D, Kritsilis M, Kyrou A, Makeeva T, Minguez-Olaondo A, Pilati L, Serrien A, Tsurkalenko O, Van den Abbeele D, van Hoogstraten WS, Lampl C. From transformation to chronification of migraine: pathophysiological and clinical aspects. J Headache Pain 2020; 21:42. [PMID: 32349653 PMCID: PMC7189559 DOI: 10.1186/s10194-020-01111-8] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 04/15/2020] [Indexed: 02/06/2023] Open
Abstract
Chronic migraine is a neurological disorder characterized by 15 or more headache days per month of which at least 8 days show typical migraine features. The process that describes the development from episodic migraine into chronic migraine is commonly referred to as migraine transformation or chronification. Ample studies have attempted to identify factors associated with migraine transformation from different perspectives. Understanding CM as a pathological brain state with trigeminovascular participation where biological changes occur, we have completed a comprehensive review on the clinical, epidemiological, genetic, molecular, structural, functional, physiological and preclinical evidence available.
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Affiliation(s)
- M. Torres-Ferrús
- Headache and Craniofacial Pain Unit, Neurology Department, Hospital Universitari Vall d’Hebron, Headache and Neurological Pain Research Group, Vall d’Hebron Research Institute (VHIR), Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - F. Ursitti
- Headache Center, Child Neurology Unit, Bambino Gesu’ Children’s Hospital, Rome, Italy
| | - A. Alpuente-Ruiz
- Headache and Craniofacial Pain Unit, Neurology Department, Hospital Universitari Vall d’Hebron, Headache and Neurological Pain Research Group, Vall d’Hebron Research Institute (VHIR), Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - F. Brunello
- Juvenile Headache Centre, Department of Woman’s and Child’s Health, University Hospital of Padua, Padua, Italy
| | - D. Chiappino
- Department of Internal medicine, Sant’Andrea Hospital, University of Rome, Sapienza, Italy
| | - T. de Vries
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - S. Di Marco
- Department of Biomedicine Neuroscience and Advanced Diagnostics, Policlinico Paolo Giaccone Hospital, University of Palermo, Palermo, Italy
| | - S. Ferlisi
- Department of Biomedicine Neuroscience and Advanced Diagnostics, Policlinico Paolo Giaccone Hospital, University of Palermo, Palermo, Italy
| | - L. Guerritore
- Department of Internal medicine, Sant’Andrea Hospital, University of Rome, Sapienza, Italy
| | - N. Gonzalez-Garcia
- Headache and Craniofacial Pain Unit, Neurology Department, Hospital Universitario Clínico San Carlos, Madrid, Spain
| | - A. Gonzalez-Martinez
- Neurology Department, Hospital Universitario de La Princesa & Instituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - D. Khutorov
- Department of Clinical Neurology and Sleep Medicine, The Nikiforov Russian Center of Emergency and Radiation Medicine of EMERCOM of Russia, Saint-Petersburg, Russia
| | | | - A. Kyrou
- University Hospital of Psychiatry and Psychotherapy, University of Bern, Switzerland University Hospital of Psychiatry, Bern, Switzerland
| | - T. Makeeva
- Headache Unit, Department of Neurology, Medical center “New Medical Technologies”, Voronezh, Russia
| | - A. Minguez-Olaondo
- Department of Neurology, Universitary Hospital of Donostia, San Sebastian, Spain
- Department of Neurology, Clínica Universidad de Navarra, Pamplona, Spain
- Department of Neurology, Hospital Quironsalud Donostia, San Sebastian, Spain
| | - L. Pilati
- Department of Biomedicine Neuroscience and Advanced Diagnostics, Policlinico Paolo Giaccone Hospital, University of Palermo, Palermo, Italy
| | - A. Serrien
- Department of Neurology, University Hospitals Leuven, Leuven, Belgium
| | - O. Tsurkalenko
- Department of Neurology and Neurosurgery, State Institution “Dnipropetrovsk medical akademy MOH Ukraine”, Dnipro, Ukraine
| | | | - W. S. van Hoogstraten
- Department of Neuroscience, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - C. Lampl
- Headache Medical Center Linz, Ordensklinikum Linz Barmherzige Schwestern, Linz, Austria
| | - On behalf of School of Advanced Studies of European Headache Federation (EHF-SAS)
- Headache and Craniofacial Pain Unit, Neurology Department, Hospital Universitari Vall d’Hebron, Headache and Neurological Pain Research Group, Vall d’Hebron Research Institute (VHIR), Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
- Headache Center, Child Neurology Unit, Bambino Gesu’ Children’s Hospital, Rome, Italy
- Juvenile Headache Centre, Department of Woman’s and Child’s Health, University Hospital of Padua, Padua, Italy
- Department of Internal medicine, Sant’Andrea Hospital, University of Rome, Sapienza, Italy
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Biomedicine Neuroscience and Advanced Diagnostics, Policlinico Paolo Giaccone Hospital, University of Palermo, Palermo, Italy
- Headache and Craniofacial Pain Unit, Neurology Department, Hospital Universitario Clínico San Carlos, Madrid, Spain
- Neurology Department, Hospital Universitario de La Princesa & Instituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Department of Clinical Neurology and Sleep Medicine, The Nikiforov Russian Center of Emergency and Radiation Medicine of EMERCOM of Russia, Saint-Petersburg, Russia
- Grevena General Hospital, Grevena, Greece
- University Hospital of Psychiatry and Psychotherapy, University of Bern, Switzerland University Hospital of Psychiatry, Bern, Switzerland
- Headache Unit, Department of Neurology, Medical center “New Medical Technologies”, Voronezh, Russia
- Department of Neurology, Universitary Hospital of Donostia, San Sebastian, Spain
- Department of Neurology, Clínica Universidad de Navarra, Pamplona, Spain
- Department of Neurology, Hospital Quironsalud Donostia, San Sebastian, Spain
- Department of Neurology, University Hospitals Leuven, Leuven, Belgium
- Department of Neurology and Neurosurgery, State Institution “Dnipropetrovsk medical akademy MOH Ukraine”, Dnipro, Ukraine
- Department of Neurology, Ghent University Hospital, Ghent, Belgium
- Department of Neuroscience, Erasmus University Medical Centre, Rotterdam, The Netherlands
- Headache Medical Center Linz, Ordensklinikum Linz Barmherzige Schwestern, Linz, Austria
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21
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Coppola G, Di Lenola D, Abagnale C, Ferrandes F, Sebastianelli G, Casillo F, Di Lorenzo C, Serrao M, Evangelista M, Schoenen J, Pierelli F. Short-latency afferent inhibition and somato-sensory evoked potentials during the migraine cycle: surrogate markers of a cycling cholinergic thalamo-cortical drive? J Headache Pain 2020; 21:34. [PMID: 32299338 PMCID: PMC7164277 DOI: 10.1186/s10194-020-01104-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 04/07/2020] [Indexed: 12/21/2022] Open
Abstract
Background Short-latency afferent inhibition (SAI) consists of motor cortex inhibition induced by sensory afferents and depends on the excitatory effect of cholinergic thalamocortical projections on inhibitory GABAergic cortical networks. Given the electrophysiological evidence for thalamo-cortical dysrhythmia in migraine, we studied SAI in migraineurs during and between attacks and searched for correlations with somatosensory habituation, thalamocortical activation, and clinical features. Methods SAI was obtained by conditioning the transcranial magnetic stimulation-induced motor evoked potential (MEP) with an electric stimulus on the median nerve at the wrist with random stimulus intervals corresponding to the latency of individual somatosensory evoked potentials (SSEP) N20 plus 2, 4, 6, or 8 ms. We recruited 30 migraine without aura patients, 16 between (MO), 14 during an attack (MI), and 16 healthy volunteers (HV). We calculated the slope of the linear regression between the unconditioned MEP amplitude and the 4-conditioned MEPs as a measure of SAI. We also measured SSEP amplitude habituation, and high-frequency oscillations (HFO) as an index of thalamo-cortical activation. Results Compared to HV, SAI, SSEP habituation and early SSEP HFOs were significantly reduced in MO patients between attacks, but enhanced during an attack. There was a positive correlation between degree of SAI and amplitude of early HFOs in HV, but not in MO or MI. Conclusions The migraine cycle-dependent variations of SAI and SSEP HFOs are further evidence that facilitatory thalamocortical activation (of GABAergic networks in the motor cortex for SAI), likely to be cholinergic, is reduced in migraine between attacks, but increased ictally.
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Affiliation(s)
- Gianluca Coppola
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy.
| | - Davide Di Lenola
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy
| | - Chiara Abagnale
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy
| | - Fabio Ferrandes
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy
| | - Gabriele Sebastianelli
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy
| | - Francesco Casillo
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy
| | - Cherubino Di Lorenzo
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy
| | - Mariano Serrao
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy
| | - Maurizio Evangelista
- Università Cattolica del Sacro Cuore/CIC, Istituto di Anestesiologia, Rianimazione e Terapia del Dolore, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Jean Schoenen
- Headache Research Unit, University Department of Neurology CHR, Citadelle Hospital. University of Liège, Boulevard du Douzième de Ligne 1, 4000, Liège, Belgium
| | - Francesco Pierelli
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy.,IRCCS - Neuromed, via Atinense, 18, 86077, Pozzilli, IS, Italy
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22
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The function of the lateral inhibitory mechanisms in the somatosensory cortex is normal in patients with chronic migraine. Clin Neurophysiol 2020; 131:880-886. [DOI: 10.1016/j.clinph.2020.01.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 12/06/2019] [Accepted: 01/01/2020] [Indexed: 01/06/2023]
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Niddam DM, Lai KL, Tsai SY, Lin YR, Chen WT, Fuh JL, Wang SJ. Brain metabolites in chronic migraine patients with medication overuse headache. Cephalalgia 2020; 40:851-862. [PMID: 32098478 DOI: 10.1177/0333102420908579] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Medication overuse headache may be associated with widespread alterations along the thalamocortical pathway, a pathway involved in pain perception and disease progression. This study addressed whether brain metabolites in key regions of the thalamocortical pathway differed between chronic migraine patients with medication overuse headache and without medication overuse headache. METHODS Magnetic resonance spectroscopic imaging was used to map metabolites in the bilateral anterior cingulate cortices, mid cingulate cortices, posterior cingulate cortices, and the thalami. Sixteen patients with medication overuse headache were compared with 16 matched patients without medication overuse headache and 16 matched healthy controls. RESULTS Glutamate and glutamine in the right mid cingulate cortex and myo-inositol in the left anterior cingulate cortex were significantly higher in patients with medication overuse headache than patients without medication overuse headache, but similar to healthy controls. Both patient groups exhibited reduced N-acetyl-aspartate and creatine in the thalamus, reduced myo-inositol in the right anterior cingulate cortex, and elevated choline in the right mid cingulate cortex. Finally, a negative association between myo-inositol laterality index in the anterior cingulate cortices and number of days per month with acute medication use was found across all patients. CONCLUSIONS Patients with medication overuse headache were characterized by a distinct concentration profile of myo-inositol, a glial marker, in the anterior cingulate cortices that may have arisen from medication overuse and could contribute to the development of medication overuse headache.
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Affiliation(s)
- David M Niddam
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan.,Institute of Brain Science, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Kuan-Lin Lai
- Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan.,Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.,Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Shang-Yueh Tsai
- Graduate Institute of Applied Physics, National Chengchi University, Taipei, Taiwan.,Research Center for Mind, Brain and Learning, National Chengchi University, Taipei, Taiwan
| | - Yi-Ru Lin
- Department of Electronic and Computer Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Wei-Ta Chen
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan.,Institute of Brain Science, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jong-Ling Fuh
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan.,Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan.,Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Shuu-Jiun Wang
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan.,Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan.,Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
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Coppola G, Parisi V, Di Renzo A, Pierelli F. Cortical pain processing in migraine. J Neural Transm (Vienna) 2019; 127:551-566. [DOI: 10.1007/s00702-019-02089-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/28/2019] [Indexed: 12/17/2022]
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25
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Coppola G, Di Renzo A, Petolicchio B, Tinelli E, Di Lorenzo C, Parisi V, Serrao M, Calistri V, Tardioli S, Cartocci G, Schoenen J, Caramia F, Di Piero V, Pierelli F. Aberrant interactions of cortical networks in chronic migraine. Neurology 2019; 92:e2550-e2558. [DOI: 10.1212/wnl.0000000000007577] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 01/29/2019] [Indexed: 01/01/2023] Open
Abstract
ObjectiveWe investigated resting-state (RS)-fMRI using independent component analysis (ICA) to determine the functional connectivity (FC) between networks in chronic migraine (CM) patients and their correlation with clinical features.MethodsTwenty CM patients without preventive therapy or acute medication overuse underwent 3T MRI scans and were compared to a group of 20 healthy controls (HC). We used MRI to collect RS data in 3 selected networks, identified using group ICA: the default mode network (DMN), the executive control network (ECN), and the dorsal attention system (DAS).ResultsCompared to HC, CM patients had significantly reduced functional connectivity between the DMN and the ECN. Moreover, in patients, the DAS showed significantly stronger FC with the DMN and weaker FC with the ECN. The higher the severity of headache, the increased the strength of DAS connectivity, and the lower the strength of ECN connectivity.ConclusionThese results provide evidence for large-scale reorganization of functional cortical networks in chronic migraine. They suggest that the severity of headache is associated with opposite connectivity patterns in frontal executive and dorsal attentional networks.
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26
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Zhu B, Coppola G, Shoaran M. Migraine classification using somatosensory evoked potentials. Cephalalgia 2019; 39:1143-1155. [DOI: 10.1177/0333102419839975] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Objective The automatic detection of migraine states using electrophysiological recordings may play a key role in migraine diagnosis and early treatment. Migraineurs are characterized by a deficit of habituation in cortical information processing, causing abnormal changes of somatosensory evoked potentials. Here, we propose a machine learning approach to utilize somatosensory evoked potential-based biomarkers for migraine classification in a noninvasive setting. Methods Forty-two migraine patients, including 29 interictal and 13 ictal, were recruited and compared with 15 healthy volunteers of similar age and gender distribution. The right median nerve somatosensory evoked potentials were collected from all subjects. State-of-the-art machine learning algorithms including random forest, extreme gradient-boosting trees, support vector machines, K-nearest neighbors, multilayer perceptron, linear discriminant analysis, and logistic regression were used for classification and were built upon somatosensory evoked potential features in time and frequency domains. A feature selection method was employed to assess the contribution of features and compare it with previous clinical findings, and to build an optimal feature set by removing redundant features. Results Using a set of relevant features and different machine learning models, accuracies ranging from 51.2% to 72.4% were achieved for the healthy volunteers-ictal-interictal classification task. Following model and feature selection, we successfully separated the three groups of subjects with an accuracy of 89.7% for the healthy volunteers-ictal, 88.7% for healthy volunteers-interictal, 80.2% for ictal-interictal, and 73.3% for healthy volunteers-ictal-interictal classification tasks, respectively. Conclusion Our proposed model suggests the potential use of somatosensory evoked potentials as a prominent and reliable signal in migraine classification. This non-invasive somatosensory evoked potential-based classification system offers the potential to reliably separate migraine patients in ictal and interictal states from healthy controls.
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Affiliation(s)
- Bingzhao Zhu
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY, USA
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY, USA
| | - Gianluca Coppola
- Research Unit of Neurophysiology of Vision and Neurophthalmology, IRCCS-Fondazione Bietti, Rome, Italy
| | - Mahsa Shoaran
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY, USA
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28
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Affiliation(s)
- Anna Ambrosini
- Headache Unit, IRCCS Neuromed, Via Atinense, 18, I-86077, Pozzilli, Isernia, Italy.
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Marucco E, Lisicki M, Magis D. Electrophysiological Characteristics of the Migraine Brain: Current Knowledge and Perspectives. Curr Med Chem 2018; 26:6222-6235. [PMID: 29956611 DOI: 10.2174/0929867325666180627130811] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 02/16/2018] [Accepted: 03/27/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND Despite pain being its most prominent feature, migraine is primarily a disorder of sensory processing. Electrophysiology-based research in the field has consistently developed over the last fifty years. OBJECTIVE To summarize the current knowledge on the electrophysiological characteristics of the migraine brain, and discuss perspectives. METHODS We critically reviewed the literature on the topic to present and discuss articles selected on the basis of their significance and/or novelty. RESULTS Physiologic fluctuations within time, between-subject differences, and methodological issues account as major limitations of electrophysiological research in migraine. Nonetheless, several abnormalities revealed through different approaches have been described in the literature. Altogether, these results are compatible with an abnormal state of sensory processing. PERSPECTIVES The greatest contribution of electrophysiological testing in the future will most probably be the characterization of sub-groups of migraine patients sharing specific electrophysiological traits. This should serve as strategy towards personalized migraine treatment. Incorporation of novel methods of analysis would be worthwhile.
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Affiliation(s)
- Erica Marucco
- University of Liege - Headache Research Unit Liege, Liege, Belgium
| | - Marco Lisicki
- University of Liege - Headache Research Unit Liege, Liege, Belgium
| | - Delphine Magis
- Centre Hospitalier Universitaire de Liege - Headache Research Unit Liege, Liege, Belgium
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30
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Cortese F, Pierelli F, Pauri F, Di Lorenzo C, Lepre C, Malavolta G, Merluzzo C, Parisi V, Serrao M, Coppola G. Short-term cortical synaptic depression/potentiation mechanisms in chronic migraine patients with or without medication overuse. Cephalalgia 2018; 39:237-244. [DOI: 10.1177/0333102418784747] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objective To study the effects of trains of repetitive transcranial magnetic stimulation (rTMS) over the motor cortex in patients with chronic migraine (CM) with or without medication overuse (MOH). Subjects and methods Thirty-two patients (CM [n = 16]; MOH [n = 16]) and 16 healthy volunteers (HVs) underwent rTMS recording. Ten trains of 10 stimuli each (120% resting motor threshold) were applied over the left motor cortex at 1 Hz or 5 Hz in random order. The amplitude of motor evoked potential (MEP) was evaluated from electromyographic recording in the first dorsal interosseous muscle. The slope of the linear regression line for the 10 stimuli for each participant was calculated using normalized data. Results rTMS-1 Hz had a normal depressive effect on MEP amplitude in all groups. rTMS-5 Hz depressed instead of potentiating MEP amplitudes in MOH patients, with a significantly different response from that in HVs and CM patients. The slope of the linear regression of MEP amplitudes was negatively correlated with pain intensity in CM patients, and with the duration of overuse headache in MOH patients. Conclusions This different plastic behaviour suggests that MOH and CM, despite exhibiting a similar clinical phenotype, have different neurophysiological learning processes, probably related to different pathophysiological mechanisms of migraine chronification.
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Affiliation(s)
- Francesca Cortese
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Francesco Pierelli
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
- IRCCS Neuromed, Pozzilli (IS), Italy
| | - Flavia Pauri
- Sapienza University of Rome, Department of Medico-surgical Sciences and Biotechnologies, Neurology Section, Rome, Italy
| | | | - Chiara Lepre
- Sapienza University of Rome, Department of Medico-surgical Sciences and Biotechnologies, Neurology Section, Rome, Italy
| | - Giulia Malavolta
- Sapienza University of Rome, Department of Medico-surgical Sciences and Biotechnologies, Neurology Section, Rome, Italy
| | - Chiara Merluzzo
- Sapienza University of Rome, Department of Medico-surgical Sciences and Biotechnologies, Neurology Section, Rome, Italy
| | - Vincenzo Parisi
- G. B. Bietti Foundation IRCCS, Research Unit of Neurophysiology of Vision and Neurophthalmology, Rome, Italy
| | - Mariano Serrao
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Gianluca Coppola
- G. B. Bietti Foundation IRCCS, Research Unit of Neurophysiology of Vision and Neurophthalmology, Rome, Italy
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Abstract
PURPOSE OF REVIEW Chronic migraine (CM) is a recalcitrant subtype of migraine which causes high degrees of disability, poor treatment responses, and frequent recurrences in sufferers. However, the pathophysiological mechanisms underlying the development and chronification of migraine attacks remain incompletely understood. A validated animal model could help to decipher the pathogenic mechanism of the disease, facilitating the development of possible therapeutic strategies for CM. In this review, we aimed to summarize current animal models of CM and discuss the validity of these models. RECENT FINDINGS Several methods have been available to induce recurrent headache-like behaviors or biochemical changes in rodents, including repeated dural application of inflammatory soup, chronic systemic infusion of nitroglycerin, repeated administration of acute migraine abortive treatment to simulate medication overuse headache, or genetic modification. These models exhibit some features that are believed to be associated with migraine; however, none of the model can recapitulate all the clinical phenotypes found in humans and each has its own weakness. The complex features of CM increase the difficulty of constructing a proper animal model. Nonetheless, currently available models are valid to certain degrees. Future directions might consider simulating the spontaneity and chronicity of migraine by combining known genetic substrates and allostatic loads into the same model.
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32
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Comparison of somatosensory cortex excitability between migraine and “strict-criteria” tension-type headache: a magnetoencephalographic study. Pain 2018; 159:793-803. [DOI: 10.1097/j.pain.0000000000001151] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Hebestreit JM, May A. The enigma of site of action of migraine preventives: no effect of metoprolol on trigeminal pain processing in patients and healthy controls. J Headache Pain 2017; 18:116. [PMID: 29285569 PMCID: PMC5745371 DOI: 10.1186/s10194-017-0827-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 12/07/2017] [Indexed: 01/03/2023] Open
Abstract
Background Beta-blockers are a first choice migraine preventive medication. So far it is unknown how they exert their therapeutic effect in migraine. To this end we examined the neural effect of metoprolol on trigeminal pain processing in 19 migraine patients and 26 healthy controls. All participants underwent functional magnetic resonance imaging (fMRI) during trigeminal pain twice: Healthy subjects took part in a placebo-controlled, randomized and double-blind study, receiving a single dose of metoprolol and placebo. Patients were examined with a baseline scan before starting the preventive medication and 3 months later whilst treated with metoprolol. Results Mean pain intensity ratings were not significantly altered under metoprolol. Functional imaging revealed no significant differences in nociceptive processing in both groups. Contrary to earlier findings from animal studies, we did not find an effect of metoprolol on the thalamus in either group. However, using a more liberal and exploratory threshold, hypothalamic activity was slightly increased under metoprolol in patients and migraineurs. Conclusions No significant effect of metoprolol on trigeminal pain processing was observed, suggesting a peripheral effect of metoprolol. Exploratory analyses revealed slightly enhanced hypothalamic activity under metoprolol in both groups. Given the emerging role of the hypothalamus in migraine attack generation, these data need further examination.
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Affiliation(s)
- Julia M Hebestreit
- Department of Systems Neuroscience, Center for Experimental Medicine, University Medical Center Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Arne May
- Department of Systems Neuroscience, Center for Experimental Medicine, University Medical Center Eppendorf, Martinistr. 52, 20246, Hamburg, Germany.
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Niddam DM, Lai KL, Tsai SY, Lin YR, Chen WT, Fuh JL, Wang SJ. Neurochemical changes in the medial wall of the brain in chronic migraine. Brain 2017; 141:377-390. [DOI: 10.1093/brain/awx331] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 10/18/2017] [Indexed: 12/21/2022] Open
Affiliation(s)
- David M Niddam
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan
- Institute of Brain Science, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Kuan-Lin Lai
- Department of Neurology, The Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
- Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
- Department of Neurology, Taipei Municipal Gandau Hospital. Taipei, Taiwan
| | - Shang-Yueh Tsai
- Graduate Institute of Applied Physics, National Chengchi University, Taipei, Taiwan
- Research Center for Mind, Brain and Learning, National Chengchi University, Taipei, Taiwan
| | - Yi-Ru Lin
- Department of Electronic and Computer Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Wei-Ta Chen
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan
- Institute of Brain Science, School of Medicine, National Yang-Ming University, Taipei, Taiwan
- Department of Neurology, The Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jong-Ling Fuh
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan
- Department of Neurology, The Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Shuu-Jiun Wang
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan
- Department of Neurology, The Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
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Topiramate modulates trigeminal pain processing in thalamo-cortical networks in humans after single dose administration. PLoS One 2017; 12:e0184406. [PMID: 28991914 PMCID: PMC5633146 DOI: 10.1371/journal.pone.0184406] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 08/23/2017] [Indexed: 11/19/2022] Open
Abstract
Migraine is the sixth most common cause of disability in the world. Preventive migraine treatment is used to reduce frequency, severity and duration of attacks and therefore lightens the burden on the patients' quality of life and reduces disability. Topiramate is one of the preventive migraine treatments of proven efficacy. The mechanism of action underlying the preventive effect of topiramate in migraine remains largely unknown. Using functional magnetic resonance imaging (fMRI) we examined the central effects of a single dose of topiramate (100mg) on trigeminal pain in humans, compared to placebo (mannitol). In this prospective, within subject, randomized, placebo-controlled and double-blind study, 23 healthy participants received a standardized nociceptive trigeminal stimulation and control stimuli whilst being in the scanner. No differences in the subjective intensity ratings of the painful stimuli were observed between topiramate and placebo sessions. In contrast, topiramate significantly decreased the activity in the thalamus and other pain processing areas. Additionally, topiramate increased functional coupling between the thalamus and several brain regions such as the bilateral precuneus, posterior cingulate cortex and secondary somatosensory cortex. These data suggest that topiramate exhibits modulating effects on nociceptive processing in thalamo-cortical networks during trigeminal pain and that the preventive effect of topiramate on frequent migraine is probably mediated by an effect on thalamo-cortical networks.
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Uglem M, Omland PM, Stjern M, Gravdahl GB, Sand T. Habituation of laser-evoked potentials by migraine phase: a blinded longitudinal study. J Headache Pain 2017; 18:100. [PMID: 28971336 PMCID: PMC5624861 DOI: 10.1186/s10194-017-0810-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 09/25/2017] [Indexed: 12/11/2022] Open
Abstract
Background Migraineurs seem to have cyclic variations in cortical excitability in several neurophysiological modalities. Laser-evoked potentials (LEP) are of particular interest in migraine because LEP specifically targets pain pathways, and studies have reported different LEP-changes both between and during headaches. Our primary aim was to explore potential cyclic variations in LEP amplitude and habituation in more detail with a blinded longitudinal study design. Methods We compared N1 and N2P2 amplitudes and habituation between two blocks of laser stimulations to the dorsal hand, obtained from 49 migraineurs with four sessions each. We used migraine diaries to categorize sessions as interictal (> one day from previous and to next attack), preictal (< one day before the attack), ictal or postictal (< one day after the attack). Also, we compared 29 interictal recordings from the first session to 30 controls. Results N1 and N2P2 amplitudes and habituation did not differ between preictal, interictal and postictal phase sessions, except for a post hoc contrast that showed deficient ictal habituation of N1. Habituation is present and similar in migraineurs in the interictal phase and controls. Conclusions Hand-evoked LEP amplitudes and habituation were mainly invariable between migraine phases, but this matter needs further study. Because hand-evoked LEP-habituation was similar in migraineurs and controls, the present findings contradict several previous LEP studies. Pain-evoked cerebral responses are normal and show normal habituation in migraine. Electronic supplementary material The online version of this article (10.1186/s10194-017-0810-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Martin Uglem
- Department of Neuromedicine and Movement Science, NTNU, Norwegian University of Science and Technology, Trondheim, Norway. .,NTNU, Faculty of Medicine and Health Sciences, P.B. 8905, N-7491, Trondheim, Norway.
| | - Petter Moe Omland
- Department of Neuromedicine and Movement Science, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim, Norway
| | - Marit Stjern
- Department of Neuromedicine and Movement Science, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim, Norway
| | | | - Trond Sand
- Department of Neuromedicine and Movement Science, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim, Norway
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Cortese F, Pierelli F, Bove I, Di Lorenzo C, Evangelista M, Perrotta A, Serrao M, Parisi V, Coppola G. Anodal transcranial direct current stimulation over the left temporal pole restores normal visual evoked potential habituation in interictal migraineurs. J Headache Pain 2017; 18:70. [PMID: 28726157 PMCID: PMC5517389 DOI: 10.1186/s10194-017-0778-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 07/04/2017] [Indexed: 02/02/2023] Open
Abstract
Background Neuroimaging data has implicated the temporal pole (TP) in migraine pathophysiology; the density and functional activity of the TP were reported to fluctuate in accordance with the migraine cycle. Yet, the exact link between TP morpho-functional abnormalities and migraine is unknown. Here, we examined whether non-invasive anodal transcranial direct current stimulation (tDCS) ameliorates abnormal interictal multimodal sensory processing in patients with migraine. Methods We examined the habituation of visual evoked potentials and median nerve somatosensory evoked potentials (SSEP) before and immediately after 20-min anodal tDCS (2 mA) or sham stimulation delivered over the left TP in interictal migraineurs. Results Prior to tDCS, interictal migraineurs did not exhibit habituation in response to repetitive visual or somatosensory stimulation. After anodal tDCS but not sham stimulation, migraineurs exhibited normal habituation responses to visual stimulation; however, tDCS had no effect on SSEP habituation in migraineurs. Conclusion Our study shows for the first time that enhancing excitability of the TP with anodal tDCS normalizes abnormal interictal visual information processing in migraineurs. This finding has implications for the role of the TP in migraine, and specifically highlights the ventral stream of the visual pathway as a pathophysiological neural substrate for abnormal visual processing in migraine.
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Affiliation(s)
- Francesca Cortese
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica, 79 - 04100, Latina, Italy.
| | - Francesco Pierelli
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica, 79 - 04100, Latina, Italy.,INM Neuromed IRCCS, Pozzilli (IS), Italy
| | - Ilaria Bove
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica, 79 - 04100, Latina, Italy
| | | | - Maurizio Evangelista
- Università Cattolica del Sacro Cuore/CIC, Istituto di Anestesiologia, Rianimazione e Terapia del Dolore, Rome, Italy
| | | | - Mariano Serrao
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Corso della Repubblica, 79 - 04100, Latina, Italy
| | - Vincenzo Parisi
- G. B. Bietti Foundation IRCCS, Research Unit of Neurophysiology of Vision and Neuro-Ophthalmology, Rome, Italy
| | - Gianluca Coppola
- G. B. Bietti Foundation IRCCS, Research Unit of Neurophysiology of Vision and Neuro-Ophthalmology, Rome, Italy
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Cortese F, Coppola G, Di Lenola D, Serrao M, Di Lorenzo C, Parisi V, Pierelli F. Excitability of the motor cortex in patients with migraine changes with the time elapsed from the last attack. J Headache Pain 2017; 18:2. [PMID: 28063106 PMCID: PMC5218956 DOI: 10.1186/s10194-016-0712-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 12/09/2016] [Indexed: 12/03/2022] Open
Abstract
Background Motor-evoked potentials (MEPs) produced by single-pulse transcranial magnetic stimulation (TMS) of the motor cortex can be an objective measure of cortical excitability. Previously, MEP thresholds were found to be normal, increased, or even reduced in patients with migraine. In the present study, we determined whether the level of cortical excitability changes with the time interval from the last migraine attack, thereby accounting for the inconsistencies in previous reports. Methods Twenty-six patients with untreated migraine without aura (MO) underwent a MEP study between attacks. Their data were then compared to the MEP data collected from a group of 24 healthy volunteers (HVs). During the experiment, the TMS figure-of-eight coil was positioned over the left motor area. After identifying the resting motor threshold (RMT), we delivered 10 single TMS pulses (rate: 0.1 Hz, intensity: 120% of the RMT) and averaged the resulting MEP amplitudes. Results The mean RMTs and MEP amplitudes were not significantly different between the MO and HV groups. In patients with MO, the RMTs were negatively correlated with the number of days elapsed since the last migraine attack (rho = -0.404, p = 0.04). Conclusion Our results suggest that the threshold for evoking MEPs is influenced by the proximity of an attack; specifically, the threshold is lower when a long time interval has passed after an attack, and is higher (within the range of normative values) when measured close to an attack. These dynamic RMT variations resemble those we reported previously for visual and somatosensory evoked potentials and may represent time-dependent plastic changes in brain excitability in relation to the migraine cycle.
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Affiliation(s)
- Francesca Cortese
- Department of Medico-Surgical Sciences and Biotechnologies, 'Sapienza' University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy.
| | - Gianluca Coppola
- G. B. Bietti Foundation IRCCS, Research Unit of Neurophysiology of Vision and Neuro-Ophthalmology, Rome, Italy
| | - Davide Di Lenola
- Department of Medico-Surgical Sciences and Biotechnologies, 'Sapienza' University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy
| | - Mariano Serrao
- Department of Medico-Surgical Sciences and Biotechnologies, 'Sapienza' University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy
| | | | - Vincenzo Parisi
- G. B. Bietti Foundation IRCCS, Research Unit of Neurophysiology of Vision and Neuro-Ophthalmology, Rome, Italy
| | - Francesco Pierelli
- Department of Medico-Surgical Sciences and Biotechnologies, 'Sapienza' University of Rome Polo Pontino, Corso della Repubblica 79, 04100, Latina, Italy.,INM Neuromed IRCCS, Pozzilli, (IS), Italy
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Alice in Wonderland Syndrome: A Clinical and Pathophysiological Review. BIOMED RESEARCH INTERNATIONAL 2016; 2016:8243145. [PMID: 28116304 PMCID: PMC5223006 DOI: 10.1155/2016/8243145] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 11/20/2016] [Indexed: 01/09/2023]
Abstract
Alice in Wonderland Syndrome (AIWS) is a perceptual disorder, principally involving visual and somesthetic integration, firstly reported by Todd, on the literary suggestion of the strange experiences described by Lewis Carroll in Alice in Wonderland books. Symptoms may comprise among others aschematia and dysmetropsia. This syndrome has many different etiologies; however EBV infection is the most common cause in children, while migraine affects more commonly adults. Many data support a strict relationship between migraine and AIWS, which could be considered in many patients as an aura or a migraine equivalent, particularly in children. Nevertheless, AIWS seems to have anatomical correlates. According to neuroimaging, temporoparietal-occipital carrefour (TPO-C) is a key region for developing many of AIWS symptoms. The final part of this review aims to find the relationship between AIWS symptoms, presenting a pathophysiological model. In brief, AIWS symptoms depend on an alteration of TPO-C where visual-spatial and somatosensory information are integrated. Alterations in these brain regions may cause the cooccurrence of dysmetropsia and disorders of body schema. In our opinion, the association of other symptoms reported in literature could vary depending on different etiologies and the lack of clear diagnostic criteria.
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Coppola G, Di Renzo A, Tinelli E, Lepre C, Di Lorenzo C, Di Lorenzo G, Scapeccia M, Parisi V, Serrao M, Colonnese C, Schoenen J, Pierelli F. Thalamo-cortical network activity between migraine attacks: Insights from MRI-based microstructural and functional resting-state network correlation analysis. J Headache Pain 2016; 17:100. [PMID: 27778244 PMCID: PMC5078119 DOI: 10.1186/s10194-016-0693-y] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Accepted: 10/18/2016] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Resting state magnetic resonance imaging allows studying functionally interconnected brain networks. Here we were aimed to verify functional connectivity between brain networks at rest and its relationship with thalamic microstructure in migraine without aura (MO) patients between attacks. METHODS Eighteen patients with untreated MO underwent 3 T MRI scans and were compared to a group of 19 healthy volunteers (HV). We used MRI to collect resting state data among two selected resting state networks, identified using group independent component (IC) analysis. Fractional anisotropy (FA) and mean diffusivity (MD) values of bilateral thalami were retrieved from a previous diffusion tensor imaging study on the same subjects and correlated with resting state ICs Z-scores. RESULTS In comparison to HV, in MO we found significant reduced functional connectivity between the default mode network and the visuo-spatial system. Both HV and migraine patients selected ICs Z-scores correlated negatively with FA values of the thalamus bilaterally. CONCLUSIONS The present results are the first evidence supporting the hypothesis that an abnormal resting within networks connectivity associated with significant differences in baseline thalamic microstructure could contribute to interictal migraine pathophysiology.
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Affiliation(s)
- Gianluca Coppola
- Research Unit of Neurophysiology of Vision and Neurophthalmology, G.B. Bietti Foundation-IRCCS, Via Livenza 3, 00198, Rome, Italy.
| | - Antonio Di Renzo
- Research Unit of Neurophysiology of Vision and Neurophthalmology, G.B. Bietti Foundation-IRCCS, Via Livenza 3, 00198, Rome, Italy
| | - Emanuele Tinelli
- Department of Neurology and Psychiatry, Neuroradiology Section, "Sapienza" University of Rome, Rome, Italy
| | - Chiara Lepre
- Department of Medico-Surgical Sciences and Biotechnologies, Neurology Section, "Sapienza" University of Rome, Rome, Italy
| | | | - Giorgio Di Lorenzo
- Laboratory of Psychophysiology, Psychiatric Clinic, Department of Systems Medicine, University of Rome "Tor Vergata", Rome, Italy
| | - Marco Scapeccia
- Department of Neurology and Psychiatry, Neuroradiology Section, "Sapienza" University of Rome, Rome, Italy
| | - Vincenzo Parisi
- Research Unit of Neurophysiology of Vision and Neurophthalmology, G.B. Bietti Foundation-IRCCS, Via Livenza 3, 00198, Rome, Italy
| | - Mariano Serrao
- Department of Medico-Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy
| | - Claudio Colonnese
- Department of Neurology and Psychiatry, Neuroradiology Section, "Sapienza" University of Rome, Rome, Italy
- IRCCS Neuromed, Pozzilli, (IS), Italy
| | - Jean Schoenen
- Headache Research Unit, Department of Neurology-CHR Citadelle, University of Liège, Liège, Belgium
| | - Francesco Pierelli
- Department of Medico-Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy
- IRCCS Neuromed, Pozzilli, (IS), Italy
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Porcaro C, Di Lorenzo G, Seri S, Pierelli F, Tecchio F, Coppola G. Impaired brainstem and thalamic high-frequency oscillatory EEG activity in migraine between attacks. Cephalalgia 2016; 37:915-926. [DOI: 10.1177/0333102416657146] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Introduction We investigated whether interictal thalamic dysfunction in migraine without aura (MO) patients is a primary determinant or the expression of its functional disconnection from proximal or distal areas along the somatosensory pathway. Methods Twenty MO patients and twenty healthy volunteers (HVs) underwent an electroencephalographic (EEG) recording during electrical stimulation of the median nerve at the wrist. We used the functional source separation algorithm to extract four functionally constrained nodes (brainstem, thalamus, primary sensory radial, and primary sensory motor tangential parietal sources) along the somatosensory pathway. Two digital filters (1–400 Hz and 450–750 Hz) were applied in order to extract low- (LFO) and high- frequency (HFO) oscillatory activity from the broadband signal. Results Compared to HVs, patients presented significantly lower brainstem (BS) and thalamic (Th) HFO activation bilaterally. No difference between the two cortical HFO as well as in LFO peak activations between the two groups was seen. The age of onset of the headache was positively correlated with HFO power in the right brainstem and thalamus. Conclusions This study provides evidence for complex dysfunction of brainstem and thalamocortical networks under the control of genetic factors that might act by modulating the severity of migraine phenotype.
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Affiliation(s)
- Camillo Porcaro
- LET’S-ISTC-CNR, Ospedale Fatebenefratelli, Isola Tiberina, Rome, Italy
- Movement Control and Neuroplasticity Research Group, Department of Kinesiology, KU Leuven, Leuven, Belgium
- Department of Information Engineering, Università Politecnica delle Marche, Ancona, Italy
| | - Giorgio Di Lorenzo
- Laboratory of Psychophysiology, Psychiatric Chair, Department of Systems Medicine, University of Rome ‘Tor Vergata’, Rome, Italy
- Psychiatry and Clinical Psychology Unit, Department of Neurosciences, Fondazione Policlinico ‘Tor Vergata’, Rome, Italy
| | - Stefano Seri
- The Wellcome Trust Laboratory for MEG Studies, School of Life and Health Sciences, Aston University, Birmingham, UK
| | - Francesco Pierelli
- Sapienza University of Rome Polo Pontino, Latina and IRCCS Neuromed, Pozzilli (IS), Italy
| | - Franca Tecchio
- LET’S-ISTC-CNR, Ospedale Fatebenefratelli, Isola Tiberina, Rome, Italy
| | - Gianluca Coppola
- G.B. Bietti Foundation IRCCS, Department of Neurophysiology of Vision and Neurophthalmology, Rome, Italy
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Di Lorenzo C, Coppola G, Bracaglia M, Di Lenola D, Evangelista M, Sirianni G, Rossi P, Di Lorenzo G, Serrao M, Parisi V, Pierelli F. Cortical functional correlates of responsiveness to short-lasting preventive intervention with ketogenic diet in migraine: a multimodal evoked potentials study. J Headache Pain 2016; 17:58. [PMID: 27245682 PMCID: PMC4887398 DOI: 10.1186/s10194-016-0650-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 05/27/2016] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Here, we aim to identify cortical electrofunctional correlates of responsiveness to short-lasting preventiveintervention with ketogenic diet (KD) in migraine. METHODS Eighteen interictal migraineurs underwent visual (VEPs) and median nerve somatosensory (SSEPs) evokedpotentials before and after 1 month of KD during ketogenesis. We measured VEPs N1-P1 and SSEPs N20-P25 amplitudes respectively in six and in two sequential blocks of 100 sweeps as well as habituation as theslope of the linear regression between block 1 to 6 for VEPs or between 1 to 2 for SSEPs. RESULTS After 1-month of KD, a significant reduction in the mean attack frequency and duration was observed (all P< 0.001). The KD did not change the 1st SSEP and VEP block of responses, but significantly inducednormalization of the interictally reduced VEPs and SSEPs (all p < 0.01) habituation during the subsequentblocks. CONCLUSIONS KD could restore normal EPs habituation curves during stimulus repetition without significantly changing theearly amplitude responses. Thus, we hypothesize that KD acts on habituation regulating the balancebetween excitation and inhibition at the cortical level.
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Affiliation(s)
| | - Gianluca Coppola
- Department of Neurophysiology of Vision and Neurophthalmology, G. B. Bietti Foundation-IRCCS, Rome, Italy
| | - Martina Bracaglia
- Department of Medico-Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy
| | - Davide Di Lenola
- Department of Medico-Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy
| | - Maurizio Evangelista
- Istituto di Anestesiologia, Rianimazione e Terapia del Dolore, Università Cattolica del Sacro Cuore/CIC, Rome, Italy
| | - Giulio Sirianni
- Delle Medical Center, Wellness and Dietary Medicine, Rome, Italy
| | - Paolo Rossi
- INI, Headache Clinic, Grottaferrata, (RM), Italy
| | - Giorgio Di Lorenzo
- Department of Systems Medicine, University of Rome "Tor Vergata", Laboratory of Psychophysiology, Rome, Italy
| | - Mariano Serrao
- Department of Medico-Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy
| | - Vincenzo Parisi
- Department of Neurophysiology of Vision and Neurophthalmology, G. B. Bietti Foundation-IRCCS, Rome, Italy
| | - Francesco Pierelli
- Department of Medico-Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy.,INM Neuromed IRCCS, Pozzilli, (IS), Italy
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Coppola G, Bracaglia M, Di Lenola D, Di Lorenzo C, Serrao M, Parisi V, Di Renzo A, Martelli F, Fadda A, Schoenen J, Pierelli F. Visual evoked potentials in subgroups of migraine with aura patients. J Headache Pain 2015; 16:92. [PMID: 26527348 PMCID: PMC4630240 DOI: 10.1186/s10194-015-0577-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 09/15/2015] [Indexed: 01/06/2023] Open
Abstract
Background Patients suffering from migraine with aura can have either pure visual auras or complex auras with sensory disturbances and dysphasia, or both. Few studies have searched for possible pathophysiological differences between these two subgroups of patients. Methods Methods - Forty-seven migraine with aura patients were subdivided in a subgroup with exclusively visual auras (MA, N = 27) and another with complex neurological auras (MA+, N = 20). We recorded pattern-reversal visual evoked potentials (VEP: 15 min of arc cheques, 3.1 reversal per second, 600 sweeps) and measured amplitude and habituation (slope of the linear regression line of amplitude changes from the 1st to 6th block of 100 sweeps) for the N1-P1 and P1-N2 components in patients and, for comparison, in 30 healthy volunteers (HV) of similar age and gender distribution. Results VEP N1-P1 habituation, i.e. amplitude decrement between 1st and 6th block, which was obvious in most HV (mean slope −0.50), was deficient in both MA (slope +0.01, p = 0.0001) and MA+ (−0.0049, p = 0.001) patients. However, VEP N1-P1 amplitudes across blocks were normal in MA patients, while they were significantly greater in MA+ patients than in HVs. Conclusions Our findings suggest that in migraine with aura patients different aura phenotypes may be underpinned by different pathophysiological mechanisms. Pre-activation cortical excitability could be higher in patients with complex neurological auras than in those having pure visual auras or in healthy volunteers.
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Affiliation(s)
- Gianluca Coppola
- G.B. Bietti Foundation-IRCCS, Department of Neurophysiology of Vision and Neurophthalmology, Via Livenza 3, 00198, Rome, Italy.
| | - Martina Bracaglia
- Department of Medical and Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy
| | - Davide Di Lenola
- Department of Medical and Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy
| | | | - Mariano Serrao
- Department of Medical and Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy
| | - Vincenzo Parisi
- G.B. Bietti Foundation-IRCCS, Department of Neurophysiology of Vision and Neurophthalmology, Via Livenza 3, 00198, Rome, Italy
| | - Antonio Di Renzo
- G.B. Bietti Foundation-IRCCS, Department of Neurophysiology of Vision and Neurophthalmology, Via Livenza 3, 00198, Rome, Italy
| | - Francesco Martelli
- Istituto Superiore di Sanità, Dipartimento Tecnologie e Salute, Rome, Italy
| | - Antonello Fadda
- Istituto Superiore di Sanità, Dipartimento Tecnologie e Salute, Rome, Italy
| | - Jean Schoenen
- Headache Research Unit, Department of Neurology-CHR Citadelle, University of Liège, Liège, Belgium
| | - Francesco Pierelli
- Department of Medical and Surgical Sciences and Biotechnologies, "Sapienza" University of Rome Polo Pontino, Latina, Italy.,IRCCS-Neuromed, Pozzilli, IS, Italy
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Antal A. On the way to understanding migraine. Cephalalgia 2015; 36:725-6. [PMID: 26460337 DOI: 10.1177/0333102415610877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Andrea Antal
- Department of Clinical Neurophysiology, University Medical Center Göttingen, Germany
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Coppola G, Bracaglia M, Di Lenola D, Iacovelli E, Di Lorenzo C, Serrao M, Evangelista M, Parisi V, Schoenen J, Pierelli F. Lateral inhibition in the somatosensory cortex during and between migraine without aura attacks: Correlations with thalamocortical activity and clinical features. Cephalalgia 2015; 36:568-78. [DOI: 10.1177/0333102415610873] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Accepted: 08/09/2015] [Indexed: 12/23/2022]
Abstract
Background We studied lateral inhibition in the somatosensory cortex of migraineurs during and between attacks, and searched for correlations with thalamocortical activity and clinical features. Participants and methods Somatosensory evoked potentials (SSEP) were obtained by electrical stimulation of the right median (M) or ulnar (U) nerves at the wrist or by simultaneous stimulation of both nerves (MU) in 41 migraine without aura patients, 24 between (MO), 17 during attacks, and in 17 healthy volunteers (HVs). We determined the percentage of lateral inhibition of the N20–P25 component by using the formula [(100)–MU/(M + U)*100]. We also studied high-frequency oscillations (HFOs) reflecting thalamocortical activation. Results In migraine, both lateral inhibition (MO 27.9% vs HVs 40.2%; p = 0.009) and thalamocortical activity (MO 0.5 vs HVs 0.7; p = 0.02) were reduced between attacks, but not during. In MO patients, the percentage of lateral inhibition negatively correlated with days elapsed since the last migraine attack ( r = −0.510, p = 0.01), monthly attack duration ( r = −0.469, p = 0.02) and severity ( r = −0.443, p = 0.03), but positively with thalamocortical activity ( r = −0.463, p = 0.02). Conclusions We hypothesize that abnormal migraine cycle-dependent dynamics of connectivity between subcortical and cortical excitation/inhibition networks may contribute to clinical features of MO and recurrence of attacks.
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Affiliation(s)
- Gianluca Coppola
- G.B. Bietti Foundation-IRCCS, Department of Neurophysiology of Vision and Neurophthalmology, Rome, Italy
| | - Martina Bracaglia
- “Sapienza” University of Rome Polo Pontino Department of Medical and Surgical Sciences and Biotechnologies, Italy
| | - Davide Di Lenola
- “Sapienza” University of Rome Polo Pontino Department of Medical and Surgical Sciences and Biotechnologies, Italy
| | - Elisa Iacovelli
- “Sapienza” University of Rome Polo Pontino Department of Medical and Surgical Sciences and Biotechnologies, Italy
| | | | - Mariano Serrao
- “Sapienza” University of Rome Polo Pontino Department of Medical and Surgical Sciences and Biotechnologies, Italy
| | - Maurizio Evangelista
- Istituto di Anestesiologia, Rianimazione e Terapia del Dolore, Università Cattolica del Sacro Cuore/CIC, Italy
| | - Vincenzo Parisi
- G.B. Bietti Foundation-IRCCS, Department of Neurophysiology of Vision and Neurophthalmology, Rome, Italy
| | - Jean Schoenen
- Headache Research Unit, Department of Neurology-CHR Citadelle, University of Liège, Belgium
| | - Francesco Pierelli
- “Sapienza” University of Rome Polo Pontino Department of Medical and Surgical Sciences and Biotechnologies, Italy
- INM Neuromed IRCCS, Italy
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Neural Plasticity in Common Forms of Chronic Headaches. Neural Plast 2015; 2015:205985. [PMID: 26366304 PMCID: PMC4558449 DOI: 10.1155/2015/205985] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Accepted: 08/02/2015] [Indexed: 01/03/2023] Open
Abstract
Headaches are universal experiences and among the most common disorders. While headache may be physiological in the acute setting, it can become a pathological and persistent condition. The mechanisms underlying the transition from episodic to chronic pain have been the subject of intense study. Using physiological and imaging methods, researchers have identified a number of different forms of neural plasticity associated with migraine and other headaches, including peripheral and central sensitization, and alterations in the endogenous mechanisms of pain modulation. While these changes have been proposed to contribute to headache and pain chronification, some findings are likely the results of repetitive noxious stimulation, such as atrophy of brain areas involved in pain perception and modulation. In this review, we provide a narrative overview of recent advances on the neuroimaging, electrophysiological and genetic aspects of neural plasticity associated with the most common forms of chronic headaches, including migraine, cluster headache, tension-type headache, and medication overuse headache.
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Straube A, Ellrich J, Eren O, Blum B, Ruscheweyh R. Treatment of chronic migraine with transcutaneous stimulation of the auricular branch of the vagal nerve (auricular t-VNS): a randomized, monocentric clinical trial. J Headache Pain 2015; 16:543. [PMID: 26156114 PMCID: PMC4496420 DOI: 10.1186/s10194-015-0543-3] [Citation(s) in RCA: 174] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 06/16/2015] [Indexed: 01/03/2023] Open
Abstract
Background Aim of the study was assessment of efficacy and safety of transcutaneous stimulation of the auricular branch of the vagal nerve (t-VNS) in the treatment of chronic migraine. Methods A monocentric, randomized, controlled, double-blind study was conducted. After one month of baseline, chronic migraine patients were randomized to receive 25 Hz or 1 Hz stimulation of the sensory vagal area at the left ear by a handhold battery driven stimulator for 4 h/day during 3 months. Headache days per 28 days were compared between baseline and the last month of treatment and the number of days with acute medication was recorded The Headache Impact Test (HIT-6) and the Migraine Disability Assessment (MIDAS) questionnaires were used to assess headache-related disability. Results Of 46 randomized patients, 40 finished the study (per protocol). In the per protocol analysis, patients in the 1 Hz group had a significantly larger reduction in headache days per 28 days than patients in the 25 Hz group (−7.0 ± 4.6 vs. −3.3 ± 5.4 days, p = 0.035). 29.4 % of the patients in the 1 Hz group had a ≥50 % reduction in headache days vs. 13.3 % in the 25 Hz group. HIT-6 and MIDAS scores were significantly improved in both groups, without group differences. There were no serious treatment-related adverse events. Conclusion Treatment of chronic migraine by t-VNS at 1 Hz was safe and effective. The mean reduction of headache days after 12 weeks of treatment exceeded that reported for other nerve stimulating procedures.
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Affiliation(s)
- Andreas Straube
- Klinik und Poliklinik für Neurologie, Oberbayerisches Kopfschmerzzentrum, Klinikum Großhadern, Ludwig-Maximilians-Universität München, Marchioninistr. 15, 81377, Munich, Germany,
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Restuccia D, Coppola G. Auditory stimulation enhances thalamic somatosensory high-frequency oscillations in healthy humans: a neurophysiological marker of cross-sensory sensitization? Eur J Neurosci 2015; 41:1079-85. [PMID: 25784489 DOI: 10.1111/ejn.12873] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Revised: 02/11/2015] [Accepted: 02/12/2015] [Indexed: 12/13/2022]
Abstract
Electrical stimulation of upper limb nerves evokes a train of high-frequency wavelets (high-frequency oscillations, HFOs) on the human scalp. These HFOs are related to the influence of arousal-promoting structures on somatosensory input processing, and are generated in the primary somatosensory cortex (post-synaptic HFOs) and the terminal tracts of thalamocortical radiations (pre-synaptic HFOs). We previously reported that HFOs do not undergo habituation to repeated stimulations; here, we verified whether HFOs could be modulated by external sensitizing stimuli. We recorded somatosensory evoked potentials (SSEPs) in 15 healthy volunteers before and after sensitization training with an auditory stimulus. Pre-synaptic HFO amplitudes, reflecting somatosensory thalamic/thalamocortical activity, significantly increased after the sensitizing acoustic stimulation, whereas both the low-frequency N20 SSEP component and post-synaptic HFOs were unaffected. Cross-talk between subcortical arousal-related structures is a probable mechanism for the pre-synaptic HFO effect observed in this study. We propose that part of the ascending somatosensory input encoded in HFOs is specifically able to convey sensitized inputs. This preferential involvement in sensitization mechanisms suggests that HFOs play a critical role in the detection of potentially relevant stimuli, and act at very early stages of somatosensory input processing.
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Affiliation(s)
- Domenico Restuccia
- Department of Neurosciences, Catholic University, Largo A. Gemelli 8, Rome, 00168, Italy
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Diagnosis, pathophysiology and management of chronic migraine: a proposal of the Belgian Headache Society. Acta Neurol Belg 2015; 115:1-17. [PMID: 24968722 DOI: 10.1007/s13760-014-0313-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 05/13/2014] [Indexed: 12/24/2022]
Abstract
Chronic migraine (CM) is a disabling neurological condition affecting 0.5-2 % of the population. In the current third edition of the International Classification of Headache Disorders, medication overuse is no longer an exclusion criterion and CM is diagnosed in patients suffering from at least 15 headache days per month of which at least eight are related to migraine. CM is difficult to treat, and preventive treatment options are limited. We provide a pathogenetic model for CM, integrating the latest findings from neurophysiological and neuroimaging studies. On behalf of the Belgian Headache Society, we present a management algorithm for CM based on the international literature and adapted to the Belgian situation. Pharmacological treatment options are discussed, and recent data on transcranial and invasive neuromodulation studies in CM are reviewed. An integrated multimodal treatment programme may be beneficial to refractory patients, but at present, this approach is only supported by a limited number of observational studies and quite variable between centres.
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