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Sezai T, Murphy MJ, Riddell N, Nguyen V, Crewther SG. Visual Processing During the Interictal Period Between Migraines: A Meta-Analysis. Neuropsychol Rev 2023; 33:765-782. [PMID: 36115887 PMCID: PMC10770263 DOI: 10.1007/s11065-022-09562-3] [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: 10/20/2021] [Accepted: 07/20/2022] [Indexed: 10/14/2022]
Abstract
Migraine is a poorly understood neurological disorder and a leading cause of disability in young adults, particularly women. Migraines are characterized by recurring episodes of severe pulsating unilateral headache and usually visual symptoms. Currently there is some disagreement in the electrophysiological literature regarding the universality of all migraineurs exhibiting physiological visual impairments also during interictal periods (i.e., the symptom free period between migraines). Thus, this meta-analysis investigated the evidence for altered visual function as measured electrophysiologically via pattern-reversal visual evoked potential (VEP) amplitudes and habituation in adult migraineurs with or without visual aura and controls in the interictal period. Twenty-three studies were selected for random effects meta-analysis which demonstrated slightly diminished VEP amplitudes in the early fast conducting P100 component but not in N135, and substantially reduced habituation in the P100 and the N135 in migraineurs with and without visual aura symptoms compared to controls. No statistical differences were found between migraineurs with and without aura, possibly due to inadequate studies. Overall, insufficient published data and substantial heterogeneity between studies was observed for all latency components of pattern-reversal VEP, highlighting the need for further electrophysiological experimentation and more targeted temporal analysis of visual function, in episodic migraineurs.
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Affiliation(s)
- Timucin Sezai
- Department of Psychology and Counselling, School of Psychology and Public Health, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Melanie J Murphy
- Department of Psychology and Counselling, School of Psychology and Public Health, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Nina Riddell
- Department of Psychology and Counselling, School of Psychology and Public Health, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Vinh Nguyen
- Department of Psychology and Counselling, School of Psychology and Public Health, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Sheila G Crewther
- Department of Psychology and Counselling, School of Psychology and Public Health, La Trobe University, Melbourne, VIC, 3086, Australia.
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Singh R, Rai NK, Gupta A, Chouhan S, Joshi A, Goyal M. Exaggerated response to pattern reversal visual evoked potential among migraineurs. Int J Neurosci 2023:1-10. [PMID: 37812033 DOI: 10.1080/00207454.2023.2269472] [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: 12/02/2022] [Accepted: 10/06/2023] [Indexed: 10/10/2023]
Abstract
OBJECTIVE Visual evoked potential recording has reported ambiguous results among migraineurs, thus the present study explored the association of check-size and reversal rates on the latency and amplitude of pattern reversal VEP among migraineurs. METHOD AND MATERIAL Monocular VEP responses for both eyes were recorded in 133 migraineurs and 111 controls. Checkerboard pattern with phase reversal frequency of 0.5, 1, 2 and 4 Hz and check-size of 16 × 16, 32 × 32, 64 × 64 and 128 × 128, i.e. spatial frequency of 0.475, 1.029, 2.056 and 4.112 cycle per degree (cpd) were used to record 100 responses each. Three-minutes gap was given after change of reversal frequency to a higher rate for next cycle of 4 check-size records. RESULT A linear increase in latencies was observed with decreasing check-size in both groups, but migraineurs had significantly higher latencies at a given reversal rate. Amplitudes A1 and A2 were higher among migraineurs and amplitude A2 showed an inverted 'U' shaped trend with maximum amplitude at 32 × 32 check size (1.029 cpd) in both groups, with an exaggerated response among migraineurs. Check-size 32 × 32 i.e. spatial frequency of 1.029 behaves differently than other larger or smaller check-sizes. CONCLUSION Variable VEP response for different visual stimuli may be due to differential activation of respective retinocortical pathways and cortical areas. The highest amplitude at modest check-size suggests a contributory role of foveal-parafoveal fibres in migraineurs. Exaggerated physiological response to visual stimuli may be responsible for higher amplitudes and prolonged latencies among migraineurs.
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Affiliation(s)
- Ruchi Singh
- Department of Physiology, AIIMS, Bhopal, Madhya Pradesh, India
| | | | - Ashish Gupta
- Medical Student, AIIMS, Bhopal, Madhya Pradesh, India
| | - Sunil Chouhan
- Department of Physiology, AIIMS, Bhopal, Madhya Pradesh, India
| | - Ankur Joshi
- Department of Community and Family Medicine, AIIMS, Bhopal, Madhya Pradesh, India
| | - Manish Goyal
- Department of Physiology, AIIMS, Bhubaneshwar, Odisha, India
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Marti-Marca A, Vilà-Balló A, Cerda-Company X, Ikumi N, Torres-Ferrus M, Caronna E, Gallardo VJ, Alpuente A, Torralba Cuello M, Soto-Faraco S, Pozo-Rosich P. Exploring sensory sensitivity, cortical excitability, and habituation in episodic migraine, as a function of age and disease severity, using the pattern-reversal task. J Headache Pain 2023; 24:104. [PMID: 37545005 PMCID: PMC10405481 DOI: 10.1186/s10194-023-01618-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 06/20/2023] [Indexed: 08/08/2023] Open
Abstract
BACKGROUND Migraine is a cyclic, neurosensory disorder characterized by recurrent headaches and altered sensory processing. The latter is manifested in hypersensitivity to visual stimuli, measured with questionnaires and sensory thresholds, as well as in abnormal cortical excitability and a lack of habituation, assessed with visual evoked potentials elicited by pattern-reversal stimulation. Here, the goal was to determine whether factors such as age and/or disease severity may exert a modulatory influence on sensory sensitivity, cortical excitability, and habituation. METHODS Two similar experiments were carried out, the first comparing 24 young, episodic migraine patients and 28 healthy age- and gender-matched controls and the second 36 middle-aged, episodic migraine patients and 30 healthy age- and gender-matched controls. A neurologist confirmed the diagnoses. Migraine phases were obtained using eDiaries. Sensory sensitivity was assessed with the Sensory Perception Quotient and group comparisons were carried out. We obtained pattern-reversal visual evoked potentials and calculated the N1-P1 Peak-to-Peak amplitude. Two linear mixed-effects models were fitted to these data. The first model had Block (first block, last block) and Group (patients, controls) as fixed factors, whereas the second model had Trial (all trials) and Group as fixed factors. Participant was included as a random factor in both. N1-P1 first block amplitude was used to assess cortical excitability and habituation was defined as a decrease of N1-P1 amplitude across Blocks/Trials. Both experiments were performed interictally. RESULTS The final samples consisted of 18 patients with episodic migraine and 27 headache-free controls (first experiment) and 19 patients and 29 controls (second experiment). In both experiments, patients reported increased visual hypersensitivity on the Sensory Perception Quotient as compared to controls. Regarding N1-P1 peak-to-peak data, there was no main effect of Group, indicating no differences in cortical excitability between groups. Finally, significant main effects of both Block and Trial were found indicating habituation in both groups, regardless of age and headache frequency. CONCLUSIONS The results of this study yielded evidence for significant hypersensitivity in patients but no significant differences in either habituation or cortical excitability, as compared to headache-free controls. Although the alterations in patients may be less pronounced than originally anticipated they demonstrate the need for the definition and standardization of optimal methodological parameters.
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Affiliation(s)
- Angela Marti-Marca
- Headache and Neurological Pain Research Group, Vall d'Hebron Institute of Research (VHIR), Department of Medicine, Universitat Autonoma Barcelona, Barcelona, Spain
| | - Adrià Vilà-Balló
- Headache and Neurological Pain Research Group, Vall d'Hebron Institute of Research (VHIR), Department of Medicine, Universitat Autonoma Barcelona, Barcelona, Spain
| | - Xim Cerda-Company
- Headache and Neurological Pain Research Group, Vall d'Hebron Institute of Research (VHIR), Department of Medicine, Universitat Autonoma Barcelona, Barcelona, Spain
| | - Nara Ikumi
- Headache and Neurological Pain Research Group, Vall d'Hebron Institute of Research (VHIR), Department of Medicine, Universitat Autonoma Barcelona, Barcelona, Spain
| | - Marta Torres-Ferrus
- Headache and Neurological Pain Research Group, Vall d'Hebron Institute of Research (VHIR), Department of Medicine, Universitat Autonoma Barcelona, Barcelona, Spain
- Headache Unit, Department of Neurology, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Edoardo Caronna
- Headache and Neurological Pain Research Group, Vall d'Hebron Institute of Research (VHIR), Department of Medicine, Universitat Autonoma Barcelona, Barcelona, Spain
| | - Victor J Gallardo
- Headache and Neurological Pain Research Group, Vall d'Hebron Institute of Research (VHIR), Department of Medicine, Universitat Autonoma Barcelona, Barcelona, Spain
| | - Alicia Alpuente
- Headache and Neurological Pain Research Group, Vall d'Hebron Institute of Research (VHIR), Department of Medicine, Universitat Autonoma Barcelona, Barcelona, Spain
- Headache Unit, Department of Neurology, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Mireia Torralba Cuello
- Multisensory Research Group, Center for Brain and Cognition, Pompeu Fabra University, 08005, Barcelona, Spain
| | - Salvador Soto-Faraco
- Multisensory Research Group, Center for Brain and Cognition, Pompeu Fabra University, 08005, Barcelona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), 08010, Barcelona, Spain
| | - Patricia Pozo-Rosich
- Headache and Neurological Pain Research Group, Vall d'Hebron Institute of Research (VHIR), Department of Medicine, Universitat Autonoma Barcelona, Barcelona, Spain.
- Headache Unit, Department of Neurology, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
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Lisicki M, D'Ostilio K, Erpicum M, Schoenen J, Magis D. Sunlight irradiance and habituation of visual evoked potentials in migraine: The environment makes its mark. Cephalalgia 2017; 38:1351-1360. [PMID: 28856911 DOI: 10.1177/0333102417730128] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Background Migraine is a complex multifactorial disease that arises from the interaction between a genetic predisposition and an enabling environment. Habituation is considered as a fundamental adaptive behaviour of the nervous system that is often impaired in migraine populations. Given that migraineurs are hypersensitive to light, and that light deprivation is able to induce functional changes in the visual cortex recognizable through visual evoked potentials habituation testing, we hypothesized that regional sunlight irradiance levels could influence the results of visual evoked potentials habituation studies performed in different locations worldwide. Methods We searched the literature for visual evoked potentials habituation studies comparing healthy volunteers and episodic migraine patients and correlated their results with levels of local solar radiation. Results After reviewing the literature, 26 studies involving 1291 participants matched our inclusion criteria. Deficient visual evoked potentials habituation in episodic migraine patients was reported in 19 studies. Mean yearly sunlight irradiance was significantly higher in locations of studies reporting deficient habituation. Correlation analyses suggested that visual evoked potentials habituation decreases with increasing sunlight irradiance in migraine without aura patients. Conclusion Results from this hypothesis generating analysis suggest that variations in sunlight irradiance may induce adaptive modifications in visual processing systems that could be reflected in visual evoked potentials habituation, and thus partially account for the difference in results between studies performed in geographically distant centers. Other causal factors such as genetic differences could also play a role, and therefore well-designed prospective trials are warranted.
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Affiliation(s)
- Marco Lisicki
- 1 Headache Research Unit, University Department of Neurology CHR, Citadelle Hospital, Liege, Belgium
| | - Kevin D'Ostilio
- 1 Headache Research Unit, University Department of Neurology CHR, Citadelle Hospital, Liege, Belgium
| | - Michel Erpicum
- 2 Climatology and Topoclimatology Laboratory, Faculty of Sciences, Liège University, Liège, Belgium
| | - Jean Schoenen
- 1 Headache Research Unit, University Department of Neurology CHR, Citadelle Hospital, Liege, Belgium
| | - Delphine Magis
- 1 Headache Research Unit, University Department of Neurology CHR, Citadelle Hospital, Liege, Belgium
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Omland PM, Uglem M, Hagen K, Linde M, Tronvik E, Sand T. Visual evoked potentials in migraine: Is the “neurophysiological hallmark” concept still valid? Clin Neurophysiol 2016; 127:810-816. [DOI: 10.1016/j.clinph.2014.12.035] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 12/15/2014] [Accepted: 12/28/2014] [Indexed: 01/03/2023]
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Demarquay G, Mauguière F. Central Nervous System Underpinnings of Sensory Hypersensitivity in Migraine: Insights from Neuroimaging and Electrophysiological Studies. Headache 2015; 56:1418-1438. [PMID: 26350583 DOI: 10.1111/head.12651] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/06/2015] [Indexed: 01/03/2023]
Abstract
Whereas considerable data have been generated about the pathophysiology of pain processing during migraine attacks, relatively little is known about the neural basis of sensory hypersensitivity. In migraine, the term "hypersensitivity" encompasses different and probably distinct pathophysiological aspects of sensory sensitivity. During attacks, many patients have enhanced sensitivity to visual, auditory and/or olfactory stimuli, which can enhance headache while interictally, migraineurs often report abnormal sensitivity to environmental stimuli that can cause nonpainful discomfort. In addition, sensorial stimuli can influence and trigger the onset of migraine attacks. The pathophysiological mechanisms and the origin of such sensitivity (individual predisposition to develop migraine disease or consequence of repeated migraine attacks) are ill understood. Functional neuroimaging and electrophysiological studies allow for noninvasive measures of neuronal responses to external stimuli and have contributed to our understanding of mechanisms underlying sensory hypersensitivity in migraine. The purpose of this review is to present pivotal neuroimaging and neurophysiological studies that explored the basal state of brain responsiveness to sensory stimuli in migraineurs, the alterations in habituation and attention to sensory inputs, the fluctuations of responsiveness to sensory stimuli before and during migraine attacks, and the relations between sensory hypersensitivity and clinical sensory complaints.
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Affiliation(s)
- Geneviève Demarquay
- Department of Neurology, Croix-Rousse Hospital, Hospices Civils de Lyon, Lyon, France and Lyon Neuroscience Research Center (CRNL), Brain Dynamics and Cognition Team (Dycog), INSERM U1028, CNRS UMR5292, Lyon, France.
| | - François Mauguière
- Neurological Hospital Pierre Wertheimer: Functional Neurology and Epilepsy Department, Hospices Civils de Lyon and Claude Bernard Lyon1 University, Lyon, France, and Lyon Neuroscience Research Center (CRNL), Neuropain team, INSERM U1028, CNRS UMR5292, Lyon, France
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Lack of visual evoked potentials amplitude decrement during prolonged reversal and motion stimulation in migraineurs. Clin Neurophysiol 2014; 125:1223-30. [DOI: 10.1016/j.clinph.2013.10.050] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Revised: 10/11/2013] [Accepted: 10/30/2013] [Indexed: 01/09/2023]
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We were blind, so now we can see: The EP/ERP story in migraine. Clin Neurophysiol 2014; 125:433-4. [DOI: 10.1016/j.clinph.2013.10.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 10/08/2013] [Indexed: 02/07/2023]
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Omland PM, Uglem M, Engstrøm M, Linde M, Hagen K, Sand T. Modulation of visual evoked potentials by high-frequency repetitive transcranial magnetic stimulation in migraineurs. Clin Neurophysiol 2014; 125:2090-9. [PMID: 24589349 DOI: 10.1016/j.clinph.2014.01.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 12/14/2013] [Accepted: 01/29/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVE High-frequency repetitive transcranial magnetic stimulation (rTMS) modulates cortical excitability. We investigated its effect on visual evoked potentials (VEPs) in migraine. METHODS Thirty-two headache-free controls (CO), 25 interictal (MINT) and 7 preictal migraineurs (MPRE) remained after exclusions. VEPs to 8' and 65' checks were averaged in six blocks of 100 single responses. VEPs were recorded before, directly after and 25min after 10Hz rTMS. The study was blinded for diagnosis during recording and for diagnosis and block number during analysis. First block amplitudes and habituation (linear amplitude change over blocks) were analysed with repeated measures ANOVA. RESULTS With 65' checks, N70-P100 habituation was reduced in MINT compared to CO after rTMS (p=0.013). With 8' checks, habituation was reduced in MPRE compared to MINT and CO after rTMS (p<0.016). No effects of rTMS on first block amplitudes were found. CONCLUSION RTMS reduced habituation only in migraineurs, indicating increased responsivity to rTMS. The magnocellular visual subsystem may be affected interictally, while the parvocellular system may only be affected preictally. SIGNIFICANCE Migraineurs may have increased responsiveness to rTMS because of a cortical dysfunction that changes before a migraine attack.
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Affiliation(s)
- Petter M Omland
- Norwegian University of Science and Technology, Department of Neuroscience, Trondheim, Norway.
| | - Martin Uglem
- Norwegian University of Science and Technology, Department of Neuroscience, Trondheim, Norway
| | - Morten Engstrøm
- Norwegian University of Science and Technology, Department of Neuroscience, Trondheim, Norway; St. Olavs Hospital, Department of Neurology and Clinical Neurophysiology, Trondheim, Norway
| | - Mattias Linde
- Norwegian University of Science and Technology, Department of Neuroscience, Trondheim, Norway; St. Olavs Hospital, Department of Neurology and Clinical Neurophysiology, Trondheim, Norway
| | - Knut Hagen
- Norwegian University of Science and Technology, Department of Neuroscience, Trondheim, Norway; St. Olavs Hospital, Department of Neurology and Clinical Neurophysiology, Trondheim, Norway
| | - Trond Sand
- Norwegian University of Science and Technology, Department of Neuroscience, Trondheim, Norway; St. Olavs Hospital, Department of Neurology and Clinical Neurophysiology, Trondheim, Norway
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Yu N, Liu H, Wang X, Lu H. A joint sparse representation-based method for double-trial evoked potentials estimation. Comput Biol Med 2013; 43:2071-8. [PMID: 24290923 DOI: 10.1016/j.compbiomed.2013.09.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 09/18/2013] [Accepted: 09/21/2013] [Indexed: 10/26/2022]
Abstract
In this paper, we present a novel approach to solving an evoked potentials estimating problem. Generally, the evoked potentials in two consecutive trials obtained by repeated identical stimuli of the nerves are extremely similar. In order to trace evoked potentials, we propose a joint sparse representation-based double-trial evoked potentials estimation method, taking full advantage of this similarity. The estimation process is performed in three stages: first, according to the similarity of evoked potentials and the randomness of a spontaneous electroencephalogram, the two consecutive observations of evoked potentials are considered as superpositions of the common component and the unique components; second, making use of their characteristics, the two sparse dictionaries are constructed; and finally, we apply the joint sparse representation method in order to extract the common component of double-trial observations, instead of the evoked potential in each trial. A series of experiments carried out on simulated and human test responses confirmed the superior performance of our method.
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Affiliation(s)
- Nannan Yu
- School of Electrical Engineering and Automation, Jiangsu Normal University, Xuzhou 221116, China
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Évaluation électrophysiologique de l’excitabilité corticale dans la migraine. Rev Neurol (Paris) 2013; 169:427-35. [DOI: 10.1016/j.neurol.2013.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Revised: 02/20/2013] [Accepted: 02/26/2013] [Indexed: 11/21/2022]
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Bir LS, Degirmenci E, Erdogan C. Lack of Visual Habituation in Multiple Sclerosis: An Electrophysiological Study. Neuroophthalmology 2013; 37:7-11. [PMID: 28163749 DOI: 10.3109/01658107.2012.753911] [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: 06/04/2012] [Revised: 08/27/2012] [Accepted: 08/27/2012] [Indexed: 11/13/2022] Open
Abstract
In this study, we aimed to investigate habituation of pattern-reversal visually evoked potentials (VEPs) in patients with relapsing remitting (RR) multiple sclerosis (MS). Twenty-one patients with this diagnosis and with a history of optic neuritis (ON), 29 such patients without a history of ON, and 25 normal controls were enrolled to study. One eye of each patient in the group with a history of ON and one eye of each subject in the control group was randomly selected. In the group with a past history of ON, the affected eye of the patients was selected in unilateral cases and the eye in which showed the greater latency delay of the P100 component in bilateral cases. P100 amplitudes were determined by visual inspection in 10 blocks of 512 responses and habituation was analysed as the percentage amplitude change between the 1st and 2nd-10th blocks. Amplitude of the P100 component of the VEP showed a significant clear-cut habituation after the first block in the control group but neither patient group showed a significant decrease in P100 amplitude. We conclude that our electrophysiological study has shown a lack of habituation in patients suffering from RR MS. This result could be important for the evaluation of visual system involvement in patients with MS, with or without a previous history of ON.
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Affiliation(s)
- Levent Sinan Bir
- Medical Faculty, Department of Neurology, Pamukkale University Denizli Turkey
| | - Eylem Degirmenci
- Medical Faculty, Department of Neurology, Pamukkale University Denizli Turkey
| | - Cagdas Erdogan
- Medical Faculty, Department of Neurology, Pamukkale University Denizli Turkey
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Omland PM, Nilsen KB, Uglem M, Gravdahl G, Linde M, Hagen K, Sand T. Visual Evoked Potentials in Interictal Migraine: No Confirmation of Abnormal Habituation. Headache 2013; 53:1071-86. [DOI: 10.1111/head.12006] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2012] [Indexed: 12/13/2022]
Affiliation(s)
- Petter M. Omland
- Department of Neuroscience; Norwegian University of Science and Technology; Trondheim; Norway
| | - Kristian B. Nilsen
- Department of Neuroscience; Norwegian University of Science and Technology; Trondheim; Norway
| | - Martin Uglem
- Department of Neuroscience; Norwegian University of Science and Technology; Trondheim; Norway
| | - Gøril Gravdahl
- Department of Neuroscience; Norwegian University of Science and Technology; Trondheim; Norway
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Shibata K, Yamane K, Nishimura Y, Kondo H, Otuka K. Spatial frequency differentially affects habituation in migraineurs: a steady-state visual-evoked potential study. Doc Ophthalmol 2011; 123:65-73. [PMID: 21769699 DOI: 10.1007/s10633-011-9281-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Accepted: 07/04/2011] [Indexed: 11/29/2022]
Abstract
A lack of habituation in visual-evoked potentials (VEPs) is the main abnormality observed in migraineurs. However, no study of steady-state VEPs has yet evaluated pattern-reversal stimuli with respect to habituation behavior or spatial frequency. The aim of this study was to clarify habituation behavior in migraineurs between attacks and to establish characteristics of VEPs in these patients. Steady-state VEPs were sequentially recorded as checkerboard patterns in four consecutive blocks from 12 patients with migraine without aura (MO), 12 patients with migraine with aura (MA), and 12 healthy controls (HC) at four spatial frequencies of 0.5, 1.0, 2.0, and 4.0 cycles per degree (cpd) with a stimulus rate of 7.5 Hz (15 reversal/s). VEP amplitudes were consistently higher in migraineurs. However, habituation was not demonstrated in HCs, and migraineurs did not reveal a clear lack of habituation. MAs exhibited high-amplitude VEPs, depending on spatial frequency. In the MA patients, amplitude differences reached statistical significance at 2.0 cpd. The sequential amplitude changes at 0.5 cpd were significantly different in MAs compared with HCs. Migraine patients exhibited high-amplitude VEPs, which were dependent on spatial frequency, and may be related to altered excitability in pre-cortical and cortical visual processing.
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Affiliation(s)
- Koichi Shibata
- Department of Medicine, Tokyo Women's Medical University, Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo, 116-8567, Japan.
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