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Deodato M, Granato A, Martini M, Sabot R, Buoite Stella A, Manganotti P. Instrumental assessment of pressure pain threshold over trigeminal and extra-trigeminal area in people with episodic and chronic migraine: a cross-sectional observational study. Neurol Sci 2024; 45:3923-3929. [PMID: 38396170 PMCID: PMC11254968 DOI: 10.1007/s10072-024-07372-4] [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: 11/29/2023] [Accepted: 01/28/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND Central and peripheral sensitization are characterized by widespread hyperalgesia that is manifested by larger pain extent area and reduction in pressure pain threshold (PPT). PPT decreases in patients with migraine not only over the trigeminal cervical complex but also throughout the body. METHODS A cross-sectional study was adopted to assess the local and widespread hyperalgesia in chronic and episodic migraine patients respect to healthy controls. The guidelines of Andersen's were used to evaluate the PPT bilaterally over 3 muscles in the trigemino-cervical complex (temporalis, sub-occipitalis, trapezius) and over 1 muscle far from this area (tensor fasciae latae). RESULTS Thirty subjects with episodic migraine (35.8 ± 2.82 years), 30 with chronic migraine (53.03 ± 19.79 years), and 30 healthy controls (29.06 ± 14.03 years) were enrolled. The interaction effect was present for the trapezius muscle with a significant difference between the right and the left side in episodic group (p = 0.003). A group effect was highlighted in all four muscles analyzed such as suboccipital (p < 0.001), temporalis (p > 0.001), trapezius (p < 0.001), and TFL (p < 0.001). PPT was usually higher in the control group than in the episodic group which in turn was characterized by higher PPT values than the chronic group. CONCLUSIONS People with chronic and episodic migraine presented lower PPT than healthy controls both in the trigeminal and in the extra-trigeminal area. People with chronic migraine presented lower PPT than episodic migraine only in the trigeminal area. Temporalis and sub-occipitalis are the most sensitive muscles in people with chronic and episodic migraine.
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Affiliation(s)
- Manuela Deodato
- Department of Medical, Surgical and Health Sciences, University of Trieste, Via Pascoli 31, 34100, Trieste, Italy.
- Azienda Sanitaria Universitaria Giuliano Isontina, Via Pascoli 31, 34100, Trieste, Italy.
| | - Antonio Granato
- Department of Medical, Surgical and Health Sciences, University of Trieste, Via Pascoli 31, 34100, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Via Pascoli 31, 34100, Trieste, Italy
| | - Miriam Martini
- Department of Medical, Surgical and Health Sciences, University of Trieste, Via Pascoli 31, 34100, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Via Pascoli 31, 34100, Trieste, Italy
| | - Raffaele Sabot
- Department of Medical, Surgical and Health Sciences, University of Trieste, Via Pascoli 31, 34100, Trieste, Italy
| | - Alex Buoite Stella
- Department of Medical, Surgical and Health Sciences, University of Trieste, Via Pascoli 31, 34100, Trieste, Italy
| | - Paolo Manganotti
- Department of Medical, Surgical and Health Sciences, University of Trieste, Via Pascoli 31, 34100, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Via Pascoli 31, 34100, Trieste, Italy
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Deodato M, Granato A, Buoite Stella A, Martini M, Marchetti E, Lise I, Galmonte A, Murena L, Manganotti P. Efficacy of a dual task protocol on neurophysiological and clinical outcomes in migraine: a randomized control trial. Neurol Sci 2024; 45:4015-4026. [PMID: 38806882 PMCID: PMC11255006 DOI: 10.1007/s10072-024-07611-8] [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: 04/02/2024] [Accepted: 05/20/2024] [Indexed: 05/30/2024]
Abstract
The main aim of this study was to investigate the efficacy of a dual task protocol in people with episodic migraine with respect to both active exercises only and cognitive task only treatments, concerning some neurophysiological and clinical outcomes. A randomized control trial was adopted in people with episodic migraine without aura. Some neurophysiological and clinical outcomes were collected (t0): resting motor threshold (rMT), short intracortical inhibition (SICI) and facilitation (ICF), pressure pain threshold (PPT), trail making test (TMT), frontal assessment battery (FAB), headache-related disability (MIDAS) and headache parameters. Then, participants were randomized into three groups: active exercise only (n = 10), cognitive task only (n = 10) and dual task protocol (n = 10). After 3 months of each treatment and after 1-month follow-up the same neurophysiological and clinical outcomes were revaluated. A significant time x group effect was only found for the trapezius muscle (p = 0.012, pη2 = 0.210), suggesting that PPT increased significantly only in active exercise and dual task protocol groups. A significant time effect was found for rMT (p < 0.001, pη2 = 0.473), MIDAS (p < 0.001, pη2 = 0.426), TMT (p < 0.001, pη2 = 0.338) and FAB (p < 0.001, pη2 = 0.462). A repeated measures ANOVA for SICI at 3 ms highlighted a statistically significant time effect for the dual task group (p < 0.001, pη2 = 0.629), but not for the active exercises group (p = 0.565, pη2 = 0.061), and for the cognitive training (p = 0.357, pη2 = 0.108). The dual task protocol seems to have a more evident effect on both habituation and sensitization outcomes than the two monotherapies taken alone in people with migraine.
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Affiliation(s)
- Manuela Deodato
- Department of Life Sciences, University of Trieste, Trieste, Italy.
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy.
- Azienda Sanitaria Universitaria Giuliano Isontina, Via Pascoli 31, 34100, Trieste, Italy.
| | - Antonio Granato
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Via Pascoli 31, 34100, Trieste, Italy
| | - Alex Buoite Stella
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Strada Di Fiume 447, 34149, Trieste, Italy
| | - Miriam Martini
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Via Pascoli 31, 34100, Trieste, Italy
| | - Enrico Marchetti
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Ilaria Lise
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Alessandra Galmonte
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Luigi Murena
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Via Pascoli 31, 34100, Trieste, Italy
| | - Paolo Manganotti
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Via Pascoli 31, 34100, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Strada Di Fiume 447, 34149, Trieste, Italy
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May A. Beyond aura: Understanding migraine as a cycling pan-sensory threshold disease. Headache 2024; 64:715-717. [PMID: 38779974 DOI: 10.1111/head.14736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 04/24/2024] [Indexed: 05/25/2024]
Affiliation(s)
- Arne May
- Department of Systems Neuroscience, University Medical Center Hamburg Eppendorf, Hamburg, Germany
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Manganotti P, Deodato M, D’Acunto L, Biaduzzini F, Garascia G, Granato A. Effects of Anti-CGRP Monoclonal Antibodies on Neurophysiological and Clinical Outcomes: A Combined Transcranial Magnetic Stimulation and Algometer Study. Neurol Int 2024; 16:673-688. [PMID: 39051212 PMCID: PMC11270432 DOI: 10.3390/neurolint16040051] [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: 05/17/2024] [Revised: 06/16/2024] [Accepted: 06/19/2024] [Indexed: 07/27/2024] Open
Abstract
BACKGROUND the aim of this study was to investigate the neurophysiological effect of anti-CGRP monoclonal antibodies on central and peripheral levels in migraine patients. METHODS An observational cohort study in patients with migraine was performed. All subjects underwent Single-Pulse and Paired-Pulse Transcranial Magnetic Stimulation, as well as a Pressure Pain Threshold assessment. The same protocol was repeated three and four months after the first injection of anti-CGRP monoclonal antibodies. RESULTS A total of 11 patients with a diagnosis of migraine and 11 healthy controls were enrolled. The main findings of this study are the significant effects of anti-CGRP mAb treatment on the TMS parameters of intracortical inhibition and the rise in the resting motor threshold in our group of patients affected by resistant migraine. The clinical effect of therapy on migraine is associated with the increase in short-interval intracortical inhibition (SICI), resting motor threshold (RMT), and Pressure Pain Threshold (PPT). In all patients, all clinical headache parameters improved significantly 3 months after the first injection of mAbs and the improvement was maintained at the 1-month follow-up. At baseline, migraineurs and HCs had significant differences in all TMS parameters and in PPT, while at follow-up assessment, no differences were observed on RMT, SICI, and PPT between the two groups. After anti-CGRP monoclonal antibody injection, a significant increase in the intracortical inhibition, in the motor threshold, and in the Pressure Pain Threshold in critical head areas was observed in patients with migraine, which was related to significant clinical benefits. CONCLUSIONS Anti-CGRP monoclonal antibodies improved clinical and neurophysiological outcomes, reflecting a normalization of cortical excitability and peripheral and central sensitization. By directly acting on the thalamus or hypothalamus and indirectly on the trigeminocervical complex, treatment with anti-CGRP monoclonal antibodies may modulate central sensorimotor excitability and peripheral sensitization pain.
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Affiliation(s)
- Paolo Manganotti
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34100 Trieste, Italy; (P.M.); (L.D.); (F.B.); (G.G.); (A.G.)
- Azienda Sanitaria Universitaria Giuliano Isontina (ASU GI), 34128 Trieste, Italy
| | - Manuela Deodato
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34100 Trieste, Italy; (P.M.); (L.D.); (F.B.); (G.G.); (A.G.)
- Azienda Sanitaria Universitaria Giuliano Isontina (ASU GI), 34128 Trieste, Italy
| | - Laura D’Acunto
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34100 Trieste, Italy; (P.M.); (L.D.); (F.B.); (G.G.); (A.G.)
- Azienda Sanitaria Universitaria Giuliano Isontina (ASU GI), 34128 Trieste, Italy
| | - Francesco Biaduzzini
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34100 Trieste, Italy; (P.M.); (L.D.); (F.B.); (G.G.); (A.G.)
- Azienda Sanitaria Universitaria Giuliano Isontina (ASU GI), 34128 Trieste, Italy
| | - Gabriele Garascia
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34100 Trieste, Italy; (P.M.); (L.D.); (F.B.); (G.G.); (A.G.)
- Azienda Sanitaria Universitaria Giuliano Isontina (ASU GI), 34128 Trieste, Italy
| | - Antonio Granato
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34100 Trieste, Italy; (P.M.); (L.D.); (F.B.); (G.G.); (A.G.)
- Azienda Sanitaria Universitaria Giuliano Isontina (ASU GI), 34128 Trieste, Italy
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Rota E, Cavagnetto E, Immovilli P, Frola E, Salari P, Morelli N, Battaggia A. Alexithymia Increases Pericranial and Cervical Muscle Tenderness in Women with Migraine. J Clin Med 2024; 13:2772. [PMID: 38792315 PMCID: PMC11122248 DOI: 10.3390/jcm13102772] [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: 04/12/2024] [Revised: 05/07/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
Background/Objectives: Alexithymia is characterized by a deficit in identifying and communicating feelings. Emerging evidence suggests that alexithymia is highly prevalent in migraine, in a complex interplay with psychiatric comorbidity. Pericranial/cervical muscle tenderness is a remarkable clinical feature in a large proportion of migraine patients. This pilot study aimed at investigating the relationship between alexithymia and pericranial/cervical muscle tenderness in female migraineurs. Methods: A total of 42 female patients fulfilling the diagnostic criteria for migraine were enrolled into this pilot, observational, cross-sectional study after informed consent was obtained. Each patient underwent a psychological assessment to identify any alexithymia by means of TAS-20, anxiety/mood comorbidity (by means of STAI-Y1 STAI-Y2, BDI-II), and migraine-related disability (by means of HIT-6), and a physical cranial/cervical musculoskeletal examination. Palpation of pericranial and cervical muscles was carried out in the standardized manner. A Cumulative Muscle Tenderness (CUM) score (0-6) was calculated for each patient. A multivariate analysis was performed to investigate any association amongst the TAS-20 score, the CUM score, and the following covariates: BDI-II, STAI-Y1, STAI-Y2, and HIT-6 scores, age, disease duration, monthly migraine days, and average head pain intensity in the previous three months. Results: Overall, 35.6% of the sample had alexithymia. The multivariate analysis detected a linear and independent relationship between the TAS-20 and CUM scores, with a statistically significant (p = 0.017) association. Conclusions: This pilot study suggests that alexithymia plays a role in increasing pericranial/cervical muscle tenderness in migraine, independently from psychiatric comorbidity. A novel therapeutical approach, targeting alexithymia, may well reduce muscular tenderness in female migraineurs.
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Affiliation(s)
- Eugenia Rota
- Neurology Unit, San Giacomo Hospital, 15067 Novi Ligure, Italy; (E.R.); (E.C.); (P.S.)
| | - Elisa Cavagnetto
- Neurology Unit, San Giacomo Hospital, 15067 Novi Ligure, Italy; (E.R.); (E.C.); (P.S.)
| | - Paolo Immovilli
- Neurology Unit, Guglielmo da Saliceto Hospital, 29121 Piacenza, Italy
| | - Enrico Frola
- IUSTO—Istituto Universitario Salesiano Torino Rebaudengo, 10155 Torino, Italy;
| | - Pavel Salari
- Neurology Unit, San Giacomo Hospital, 15067 Novi Ligure, Italy; (E.R.); (E.C.); (P.S.)
| | - Nicola Morelli
- Neuroradiology Unit, Guglielmo da Saliceto Hospital, 29121 Piacenza, Italy;
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Deodato M, Granato A, Martini M, Buoite Stella A, Galmonte A, Murena L, Manganotti P. Neurophysiological and Clinical Outcomes in Episodic Migraine Without Aura: A Cross-Sectional Study. J Clin Neurophysiol 2024; 41:388-395. [PMID: 37934069 DOI: 10.1097/wnp.0000000000001055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023] Open
Abstract
PURPOSE The aim of this study was to assess differences between people with episodic migraine and healthy controls in some neurophysiological and clinical outcomes, which, in turn, may highlight the differences in sensory processing, especially in cortical excitability, pain processing, and executive function. METHODS A cross-sectional study was performed, including the following outcomes: pressure pain thresholds with algometry; resting motor threshold, short-interval intracortical inhibition, and intracortical facilitation with transcranial magnetic stimulation; and executive functions with the trail making test and the frontal assessment battery. RESULTS Thirty adults with migraine (36 ± 10 years) and 30 healthy controls (29 ± 14 years) were included in this study. Compared with the healthy controls, participants with migraine presented lower pressure pain thresholds values in all the assessed muscles ( P < 0.001), lower resting motor threshold (-10.5% of the stimulator output, 95% CI: -16.8 to -4.2, P = 0.001, Cohen d = 0.869) and higher short-interval intracortical inhibition motor-evoked potential's amplitude at 3 ms (0.25, 95% CI: 0.05 to 0.46, P = 0.015, Cohen d = 0.662), and worse performances both in trail making test (7.1, 95% CI: 0.9 to 13.4, P = 0.027, Cohen d = 0.594) and frontal assessment battery (-1.1, 95% CI: -1.7 to -0.5, P = 0.001, Cohen d = 0.915). CONCLUSIONS Participants with migraine presented significant differences in cortical excitability, executive functions, and pressure pain thresholds, compared with healthy controls.
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Affiliation(s)
- Manuela Deodato
- PhD Program in Neural and Cognitive Sciences, Department of Life Sciences, University of Trieste, Trieste, Italy
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy; and
- Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
| | - Antonio Granato
- Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
| | - Miriam Martini
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy; and
- Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
| | - Alex Buoite Stella
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy; and
| | - Alessandra Galmonte
- PhD Program in Neural and Cognitive Sciences, Department of Life Sciences, University of Trieste, Trieste, Italy
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy; and
| | - Luigi Murena
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy; and
- Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
| | - Paolo Manganotti
- PhD Program in Neural and Cognitive Sciences, Department of Life Sciences, University of Trieste, Trieste, Italy
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy; and
- Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
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Sennholz A, Szikszay TM, Marusich T, Luedtke K, Carvalho GF. Association between central sensitization, pain sensitivity and balance control in patients with migraine. Eur J Pain 2024; 28:786-796. [PMID: 38100255 DOI: 10.1002/ejp.2218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/18/2023] [Accepted: 11/23/2023] [Indexed: 12/17/2023]
Abstract
BACKGROUND Balance alterations are prevalent among pain conditions, including migraine. The mechanisms explaining the association between pain and balance are unclear, as well as whether levels of pain sensitivity correlate with impaired balance. Our aim was therefore to investigate the association between balance, central sensitization symptoms and pain sensitivity in patients with migraine. METHODS This cross-sectional study included 50 patients and demographic, clinical information, central sensitization inventory (CSI) and pain catastrophizing (PCS) scores were obtained. Patients underwent a standardized protocol evaluating balance and pain thresholds for cold (CPT), heat (HPT), mechanical (MPT) and pressure (PPT) in trigeminal (V1) and extra-trigeminal (C6) dermatomes. Data were analysed using Person's correlation, linear regression models and contrasting the presence and absence of central sensitization symptoms through T-tests. RESULTS Mild-to-moderate correlations were observed between balance and MPT in V1 (r = -0.24, p = 0.046) and C6 (r = -0.41, p = 0.002), CPT in V1 (r = 0.31, p = 0.026), CSI scores (r = 0.27, p = 0.029) and migraine frequency (r = 0.25, p = 0.040). Balance was explained by CPT and MPT (R2 = 0.32, p = 0.001). The variance of CSI was explained by PCS scores and balance (R2 = 0.28, p = 0.001). Patients with symptoms of central sensitization presented an increased balance impairment (p = 0.044) and higher catastrophizing levels (p = 0.001) in contrast to patients without symptoms. CONCLUSION Balance impairment is associated with reduced pain thresholds and higher CSI scores. These results may help to elucidate the aetiology of balance alterations among chronic pain conditions. SIGNIFICANCE For the first time, it has been shown that balance alterations can reflect greater pain sensitivity and signs of central sensitization in patients with migraine. This opens up perspectives for future studies to understand the mechanisms and further factors associated with balance and pain sensitivity in migraine.
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Affiliation(s)
- A Sennholz
- Department of Physiotherapy, Institute of Health Sciences, Pain and Exercise Research Luebeck (P.E.R.L), Universität zu Lübeck, Lübeck, Germany
| | - T M Szikszay
- Department of Physiotherapy, Institute of Health Sciences, Pain and Exercise Research Luebeck (P.E.R.L), Universität zu Lübeck, Lübeck, Germany
| | - T Marusich
- Department of Physiotherapy, Institute of Health Sciences, Pain and Exercise Research Luebeck (P.E.R.L), Universität zu Lübeck, Lübeck, Germany
| | - K Luedtke
- Department of Physiotherapy, Institute of Health Sciences, Pain and Exercise Research Luebeck (P.E.R.L), Universität zu Lübeck, Lübeck, Germany
| | - G F Carvalho
- Department of Physiotherapy, Institute of Health Sciences, Pain and Exercise Research Luebeck (P.E.R.L), Universität zu Lübeck, Lübeck, Germany
- Department of Physiotherapy, Faculty of Health, Safety and Society, Furtwangen University, Furtwangen, Germany
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Marusich T, Szikszay TM, Sennholz A, Luedtke K, Carvalho GF. Translation, cross-cultural adaptation and measurement proprieties of the German version of the Allodynia Symptom Checklist (ASC-12). J Headache Pain 2023; 24:160. [PMID: 38041009 PMCID: PMC10693116 DOI: 10.1186/s10194-023-01697-9] [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: 10/17/2023] [Accepted: 11/27/2023] [Indexed: 12/03/2023] Open
Abstract
BACKGROUND Cutaneous allodynia is highly prevalent among migraineurs and is associated with a poor prognosis. The Allodynia Symptom Checklist (ASC-12) is a comprehensive questionnaire to identify the presence and severity of allodynia. Our aim was to translate and adapt the ASC-12 to German and evaluate its measurement properties. METHODS Following the COSMIN guidelines, 80 migraine patients were enrolled in the study to evaluate the stages of translation (n=30) and measurement propriety assessment (n=50), respectively. After reaching a final version, the German ASC-12 was assessed for structural validity, internal consistency, test-retest reliability, construct validity and absolute agreement, using mechanical and thermal pain thresholds as reference method. RESULTS The German version of the ASC-12 presented an adequate structural validity compatible with the original version of the questionnaire. Its internal consistency ranged from 0.70 to 0.80 considering the total score and the thermic, static and dynamic mechanic subdomains. The total score presented excellent reliability (ICC: 0.85) with a standard error of measurement of 1.15 points and smallest detectable change of 3.40 points. ASC-12 total scores were correlated with headache intensity (r=0.38, p=0.004), headache disability (r=0.37, p=0.004) and cold pain thresholds (r=0.28, p=0.025). The thermic allodynia ASC-12 scores were correlated with cold (r=0.36, p=0.005) and heat (r=-0.30, p=0.010) pain thresholds, while the static mechanical allodynia ASC-12 scores correlated with mechanical pain threshold (r=0.29, p=0.019) and with mechanical pain sensitivity (r=0.24 to 0.28, p< 0.045). Despite no significant bias between methods, quantitative sensory testing (QST) results and ASC-12 scores tend to disagree. CONCLUSION The German version of the ASC-12 is available for research and clinical settings and presented adequate measurement proprieties, as the original version. Despite the correlation between the ASC-12 and QST, one method cannot be replaced by the other.
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Affiliation(s)
- Tetiana Marusich
- Institut für Gesundheitswissenschaften, Studiengang Physiotherapie, Pain and Exercise Research Luebeck (P.E.R.L), Universität zu Lübeck, Lübeck, Deutschland
| | - Tibor M Szikszay
- Institut für Gesundheitswissenschaften, Studiengang Physiotherapie, Pain and Exercise Research Luebeck (P.E.R.L), Universität zu Lübeck, Lübeck, Deutschland
| | - Anne Sennholz
- Institut für Gesundheitswissenschaften, Studiengang Physiotherapie, Pain and Exercise Research Luebeck (P.E.R.L), Universität zu Lübeck, Lübeck, Deutschland
| | - Kerstin Luedtke
- Institut für Gesundheitswissenschaften, Studiengang Physiotherapie, Pain and Exercise Research Luebeck (P.E.R.L), Universität zu Lübeck, Lübeck, Deutschland.
| | - Gabriela F Carvalho
- Department of Physiotherapy, Faculty of Health, Safety and Society, Furtwangen University, Furtwangen, Germany
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Fischer‐Schulte L, May A. The 15‐day threshold in the definition of chronic migraine is reasonable and sufficient—Five reasons for not changing the ICHD‐3 definition. Headache 2022; 62:1231-1233. [DOI: 10.1111/head.14383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 07/27/2022] [Accepted: 07/29/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Laura Fischer‐Schulte
- Department of Systems Neuroscience University Clinic Hamburg Eppendorf Hamburg Germany
- Clinic for Psychiatry University Clinic Hamburg Eppendorf Hamburg Germany
| | - Arne May
- Department of Systems Neuroscience University Clinic Hamburg Eppendorf Hamburg Germany
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Gradually shifting clinical phenomics in migraine spectrum: a cross-sectional, multicenter study of 5438 patients. J Headache Pain 2022; 23:89. [PMID: 35883029 PMCID: PMC9327365 DOI: 10.1186/s10194-022-01461-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 07/16/2022] [Indexed: 11/11/2022] Open
Abstract
Background The aim of the study was to investigate whether MwoA and MwA are different manifestations of a single disease, distinct clinical entities, or located at two poles of a spectrum. Methods In this cross-sectional study, 5438 patients from 10 hospitals in China were included: 4651 were diagnosed with migraine without aura (MwoA) and 787 with migraine with aura (MwA). We used a validated standardized electronic survey to collect multidimensional data on headache characteristics and evaluated the similarities and differences between migraine subtypes. To distinguish migraine subtypes, we employed correlational analysis, factor analysis of mixed data (FAMD), and decision tree analysis. Results Compared to MwA, MwoA had more severe headaches, predominantly affected females, were more easily produced by external factors, and were more likely to have accompanying symptoms and premonitory neck stiffness. Patients with MwA are heterogeneous, according to correlation analysis; FAMD divided the subjects into three clear clusters. The majority of the differences between MwoA and MwA were likewise seen when typical aura with migraine headache (AWM) and typical aura with non-migraine headache (AWNM) were compared. Furthermore, decision trees analysis revealed that the chaotic MwA data reduced the decision tree’s accuracy in distinguishing MwoA from MwA, which was significantly increased by splitting MwA into AWM and AWNM. Conclusions The clinical phenomics of headache phenotype varies gradually from MwoA to AWM and AWNM, and AWM is a mid-state between MwoA and AWNM. We tend to regard migraine as a spectrum disorder, and speculate that different migraine subtypes have different “predominant regions” that generate attacks. Supplementary Information The online version contains supplementary material available at 10.1186/s10194-022-01461-5.
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Deodato M, Granato A, Ceschin M, Galmonte A, Manganotti P. Algometer Assessment of Pressure Pain Threshold After Onabotulinumtoxin-A and Physical Therapy Treatments in Patients With Chronic Migraine: An Observational Study. FRONTIERS IN PAIN RESEARCH 2022; 3:770397. [PMID: 35295800 PMCID: PMC8915742 DOI: 10.3389/fpain.2022.770397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 01/10/2022] [Indexed: 11/25/2022] Open
Abstract
The purpose of this study was to evaluate pain hypersensitivity in chronic migraine patients 3 months after undergoing onabotulinumtoxin-A therapy, physical therapy (PT), or the combination of the two. Pressure pain threshold (PPT) was assessed in accordance with Andersen's guidelines, focusing on five muscles in the trigeminocervical area (namely, trapezius, levator scapulae, temporalis, sub-occipitalis, and scalenus medius) and one muscle outside of the area, (i.e., tensor fasciae latae). Moreover, three headache parameters, namely, attack frequency, duration, and pain intensity, were recorded in an ad hoc diary kept by the patients. A total of 30 patients were included in three treatment groups: 1. onabotulinumtoxin-A therapy, 2. PT, and 3. a combination of onabotulinumtoxin-A and PT. The results show that, at the final assessment, the PPT was significantly reduced in the combined treatment group compared to the two single-therapy groups. As regards headache parameters, frequency and duration of the attacks were decreased significantly in all three treatment groups, whereas in pain intensity, the reduction was statistically significant in the combined treatment group and the onabotulinumtoxin-A therapy. Results suggest that a better pain modulation in patients with chronic migraine can be achieved with a combined treatment of onabotulinumtoxin-A and physical therapy. Indeed, the combination of both pharmacological and non-pharmacological treatments results in the reduction of both headache-related parameters and widespread pressure hyperalgesia.
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Affiliation(s)
- Manuela Deodato
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Department of Life Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
- *Correspondence: Manuela Deodato
| | - Antonio Granato
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
| | - Marta Ceschin
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Alessandra Galmonte
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Paolo Manganotti
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
- Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
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12
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Di Antonio S, Castaldo M, Ponzano M, Bovis F, Hugo Villafañe J, Torelli P, Finocchi C, Arendt‐Nielsen L. Trigeminal and cervical sensitization during the four phases of the migraine cycle in patients with episodic migraine. Headache 2022; 62:176-190. [DOI: 10.1111/head.14261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 12/19/2022]
Affiliation(s)
- Stefano Di Antonio
- Department of Health Science and Technology Center for Pain and Neuroplasticity School of Medicine Aalborg University Aalborg Denmark
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal Child Health University of Genoa Genoa Italy
| | - Matteo Castaldo
- Department of Health Science and Technology Center for Pain and Neuroplasticity School of Medicine Aalborg University Aalborg Denmark
| | - Marta Ponzano
- Department of Health Sciences Section of Biostatistics University of Genoa Genoa Italy
| | - Francesca Bovis
- Department of Health Sciences Section of Biostatistics University of Genoa Genoa Italy
| | | | - Paola Torelli
- Headache Centre Department of Medicine and Surgery University of Parma Parma Italy
| | - Cinzia Finocchi
- Headache Centre IRCCS Ospedale Policlinico San Martino Genoa Italy
| | - Lars Arendt‐Nielsen
- Department of Health Science and Technology Center for Pain and Neuroplasticity School of Medicine Aalborg University Aalborg Denmark
- Department of Medical Gastroenterology Mech‐Sense Aalborg University Hospital Aalborg Denmark
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13
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Non-invasive vagus nerve stimulation modulates trigeminal but not somatosensory perception: functional evidence for a trigemino-vagal system in humans. Pain 2022; 163:1978-1986. [PMID: 35082253 DOI: 10.1097/j.pain.0000000000002595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 01/07/2022] [Indexed: 11/26/2022]
Abstract
ABSTRACT Non-invasive vagus nerve stimulation (nVNS) is effective in several types of headache disorders. We sought to unravel the mechanism of how nVNS exhibits this efficacy. This study used a randomized, single-blind, sham-controlled, crossover-design, and comprised three projects with three independent cohorts of healthy participants. Project I (n=15) was explorative. Six quantitative sensory test (QST) parameters, including mechanical pain threshold (MPT), were measured over the left V1 dermatome and forearm, and compared before and after unilateral nVNS. Projects II (n=20) and III (n=21) were online pre-registered . QST parameters were compared over the left (Project II) or bilateral V1 and V3 dermatomes (Project III), respectively, in addition to the left forearm as a control. A secondary analysis of heart rate variability (HRV) using a historical control group was used to control for systemic effects of nVNS. Verum-nVNS induced trigeminal-specific modulation of pain threshold (i.e., MPT) over the left V1 in Project I, left V1 and V3 in Project II, and bilateral V1 and V3 in Project III. Data pooled from Project II and III demonstrated greater increase of MPT in the V1 vs. V3 dermatome. There were no differences associated with sham-nVNS in any projects. HRV parameters did not change after nVNS. Our results provide functional evidence of a long hypothesized functional trigemino-vagal system in humans and may explain why nVNS is effective in some headache but not in somatic pain disorders. Since unilateral nVNS modulated the trigeminal thresholds bilaterally, this effect is probably indirect through a central top-down mechanism.
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14
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Luedtke K, Edlhaimb J. Laterality judgements in patients with frequent episodic migraine. Musculoskelet Sci Pract 2021; 51:102316. [PMID: 33418210 DOI: 10.1016/j.msksp.2020.102316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 12/08/2020] [Accepted: 12/18/2020] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Migraine is a cyclic disorder but also a chronic pain condition. Left-right recognition tasks have been shown to be impaired in patients with chronic pain. OBJECTIVES To investigate whether laterality judgements of migraine patients depend on the status within the migraine cycle. METHODS 34 episodic migraine patients completed a laterality recognition task on 30 consecutive days using the Recognise™ software. Reaction time and number of mistakes of recognising the left or right side of a face or neck movements to the right or left were recorded and analysed longitudinally. Ictal days (48 h and 24 h prior to the attack; during the headache phase; 24 h after the attack) were contrasted against interictal days using repeated measures ANOVAs. 4 headache-free controls served to investigate the natural fluctuation over time and to compare migraine versus non-migraine data in a secondary exploratory analysis. RESULTS 1691 data sets from migraine patients and 183 from control participants were included in the analyses. Results indicated that performance varied throughout the migraine cycle but only showed a clear pattern of prolonged response times for images of movements to the right (F(4,1690) = 2.412; p = 0.047), while data for frequency of correct answers and for the left side remained inconclusive. Migraine patients had a reduced frequency of correct answers (right: F(1,1873) = 11.426; p = 0.001; left: F(1,1873) = 5.873; p = 0.015). Response times where unaffected. Laterality judgements were not correlated with the dominant headache side. CONCLUSIONS The current data shows that laterality judgements can depend on the status within the migraine cycle. Laterality judgements of migraine patients where comparable to other chronic pain conditions.
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Affiliation(s)
- Kerstin Luedtke
- Department of Health Sciences, Department of Physiotherapy, Pain and Exercise Research Luebeck (P.E.R.L), University of Luebeck, Luebeck, Germany; Laboratory of Pain Research, Institute of Physiotherapy and Health Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland.
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15
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Mehnert J, Schulte L, May A. No grey matter alterations in longitudinal data of migraine patients. Brain 2020; 143:e93. [DOI: 10.1093/brain/awaa300] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Jan Mehnert
- Department of Systems Neuroscience, University Medical Center Eppendorf, Hamburg, Germany
| | - Laura Schulte
- Department of Systems Neuroscience, University Medical Center Eppendorf, Hamburg, Germany
- Clinic of Psychiatry and Psychotherapy, University Medical Center Eppendorf, Hamburg, Germany
| | - Arne May
- Department of Systems Neuroscience, University Medical Center Eppendorf, Hamburg, Germany
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16
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Schwarz A, Ziegeler C, Daneshkhah S, May A, Luedtke K. Predicting the outcome of the greater occipital nerve block - an observational study on migraine patients with and without musculoskeletal cervical impairment. Cephalalgia 2020; 41:78-89. [PMID: 32867534 DOI: 10.1177/0333102420954518] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND OBJECTIVE The importance of neck pain and the trigeminocervical complex in migraine is of high pathophysiological interest since a block to the greater occipital nerve is more effective for some primary headaches than others. This observational study hypothesised that the response to manual palpation of the upper cervical spine predicts the efficacy of the greater occipital nerve-block. METHODS We divided patients, scheduled by a neurologist to receive a greater occipital nerve-block to reduce their migraine symptoms, into three groups: Patients with no pain response to manual palpation of the neck, patients with local pain, and those with referred pain to the head. Primary outcome was the percentage change in headache frequency. Additionally, items from the quantitative sensory testing protocol were included. RESULTS Eighty-seven chronic migraine patients were recruited consecutively from a specialised outpatient clinic and 71 were included for analyses and stratified into the three groups: No pain (n = 11), local pain (n = 28), and referred pain to the head (n = 32). Overall, patients experienced a reduction of 1.9 headache days per month (SD 3.4, p < 0,0001). The groups differed significantly in the percentage change of headache frequency (p = 0.041) with the "no pain" group showing the largest reduction. The pressure-pain-threshold over C2 and headache on the day of the intervention influenced the outcome significantly (R2 0,27, p = 0,00078). No serious adverse events occurred. Sixty-five percent of the patients had headaches during the examination. The groups did not differ regarding the distribution of patients with neck-pain in absence of migraine at baseline (p = 0.618). CONCLUSION Patients that were less sensitive to palpation in the cervical region and headache-free on the day of the intervention improved more after the greater occipital nerve-block.Registration: Registered a priori at the German Clinical Trials Register (DRKS00015995).
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Affiliation(s)
- Annika Schwarz
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Health Sciences, Academic Physiotherapy, Pain and Exercise Research Luebeck (P.E.R.L), University of Luebeck, Luebeck, Germany
| | - Christian Ziegeler
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sima Daneshkhah
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Arne May
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Kerstin Luedtke
- Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Health Sciences, Academic Physiotherapy, Pain and Exercise Research Luebeck (P.E.R.L), University of Luebeck, Luebeck, Germany
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17
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Abstract
Migraine encompasses a broader spectrum of sensory symptoms than just headache. These "other" symptoms, eg, sensory phobias, cognitive and mood changes, allodynia, and many others indicate an altered sensitivity to sensory input which can be measured, in principle, by quantifying sensory threshold changes longitudinally over time. Photophobia, for example, can be quantified by investigating the discomfort thresholds towards the luminance of light. The aim of this review is to look into how thresholds change in patients with migraine. We performed a PubMed search up to June 2018 targeting all peer-reviewed articles evaluating the changes in threshold, sensory phobia, or sensitivity in patients with migraine. Migraineurs, in general, exhibit lower sensory thresholds compared with healthy controls. These threshold changes seem to follow the different phases during a migraine cycle. In general, thresholds reach a nadir when the headache starts (the ictal phase), rise after the headache ends, and then gradually descend towards the next attack. The sensory modality of measurement-mechanical, thermal, or nociceptive-and the location of measurement-trigeminal vs somatic dermatome-also influence the sensory threshold. Functional imaging studies provide evidence that the hypothalamo-thalamo-brainstem network may be the driving force behind the periodic threshold changes. In summary, there is evidence in the literature that migraine could be understood as a periodic sensory dysregulation originating from the brain. Nevertheless, the interstudy discrepancy is still high due to different study designs and a lack of focus on distinct migraine phases. Further well-designed and harmonized studies with an emphasis on the cyclic changes still need to be conducted.
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18
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Schulte LH, Mehnert J, May A. Longitudinal Neuroimaging over 30 Days: Temporal Characteristics of Migraine. Ann Neurol 2020; 87:646-651. [DOI: 10.1002/ana.25697] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 02/05/2020] [Accepted: 02/05/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Laura H. Schulte
- Department of Systems Neuroscience University Medical Center Eppendorf Hamburg Hamburg Germany
| | - Jan Mehnert
- Department of Systems Neuroscience University Medical Center Eppendorf Hamburg Hamburg Germany
| | - Arne May
- Department of Systems Neuroscience University Medical Center Eppendorf Hamburg Hamburg Germany
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Lapp HS, Sabatowski R, Weidner K, Croy I, Gossrau G. C-tactile touch perception in migraineurs – a case-control study. Cephalalgia 2019; 40:478-492. [DOI: 10.1177/0333102419889349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Background Migraine is characterized by sensory hypersensitivity and habituation deficits. Slow brushing over the skin activates C-tactile nerve fibers, which mediate pleasant touch and analgesic effects in healthy subjects. As this function is altered in painful conditions, we aimed to examine whether the C-tactile processing is disrupted in migraines. Methods To psychophysically assess C-tactile function, we applied optimal and suboptimal C-tactile stroking stimuli on the dorsal forearm (body reference area) and the trigeminally innervated skin of 52 interictal migraineurs and 52 matched healthy controls. For habituation testing, 60 repeated C-tactile optimal stimuli were presented in both test areas. The participants rated each stimulus on a visual analogue scale by intensity, pleasantness, and painfulness. Results Regarding C-tactile function, migraineurs showed unphysiological rating patterns but no significantly different pleasantness ratings than controls. During repeated stimulation, controls showed stable pleasantness ratings while migraineurs’ ratings decreased, especially in those experiencing tactile allodynia during headaches. Migraineurs taking triptans responded like controls. Conclusion The C-tactile function of migraineurs is subclinically altered. Repeated C-tactile stimulation leads to altered habituation but differs from previous work by the direction of the changes. Although the pathophysiology remains unknown, causative mechanisms could include central and peripheral neuronal sensitization, tactile allodynia and hedonic stimulus attributions.
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Affiliation(s)
- Hanna Sophie Lapp
- Pain Center, University Hospital and Faculty of Medicine Carl Gustav Carus, TU Dresden, Germany
| | - Rainer Sabatowski
- Pain Center, University Hospital and Faculty of Medicine Carl Gustav Carus, TU Dresden, Germany
- Department of Anesthesiology, University Hospital and Faculty of Medicine Carl Gustav Carus, TU Dresden, Germany
| | - Kerstin Weidner
- Department of Psychotherapy and Psychosomatic Medicine, University Hospital and Faculty of Medicine Carl Gustav Carus, TU Dresden, Germany
| | - Ilona Croy
- Department of Psychotherapy and Psychosomatic Medicine, University Hospital and Faculty of Medicine Carl Gustav Carus, TU Dresden, Germany
| | - Gudrun Gossrau
- Pain Center, University Hospital and Faculty of Medicine Carl Gustav Carus, TU Dresden, Germany
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20
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Mykland MS, Bjørk MH, Stjern M, Omland PM, Uglem M, Sand T. Fluctuations of sensorimotor processing in migraine: a controlled longitudinal study of beta event related desynchronization. J Headache Pain 2019; 20:77. [PMID: 31288756 PMCID: PMC6734210 DOI: 10.1186/s10194-019-1026-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 06/17/2019] [Indexed: 11/16/2022] Open
Abstract
Background The migraine brain seems to undergo cyclic fluctuations of sensory processing. For instance, during the preictal phase, migraineurs experience symptoms and signs of altered pain perception as well as other well-known premonitory CNS-symptoms. In the present study we measured EEG-activation to non-painful motor and sensorimotor tasks in the different phases of the migraine cycle by longitudinal measurements of beta event related desynchronization (beta-ERD). Methods We recorded electroencephalography (EEG) of 41 migraine patients and 31 healthy controls. Each subject underwent three EEG recordings on three different days with classification of each EEG recording according to the actual migraine phase. During each recording, subjects performed one motor and one sensorimotor task with the flexion-extension movement of the right wrist. Results Migraine patients had significantly increased beta-ERD and higher baseline beta power at the contralateral C3 electrode overlying the primary sensorimotor cortex in the preictal phase compared to the interictal phase. We found no significant differences in beta-ERD or baseline beta power between interictal migraineurs and controls. Conclusion Increased preictal baseline beta activity may reflect a decrease in pre-activation in the sensorimotor cortex. Altered pre-activation may lead to changes in thresholds for inhibitory responses and increased beta-ERD response, possibly reflecting a generally increased preictal cortical responsivity in migraine. Cyclic fluctuations in the activity of second- and third-order afferent somatosensory neurons, and their associated cortical and/or thalamic interneurons, may accordingly also be a central part of the migraine pathophysiology.
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Affiliation(s)
- Martin Syvertsen Mykland
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU - Norwegian University of Science and Technology, Trondheim, Norway.
| | - Marte Helene Bjørk
- Department of Clinical Medicine, University of Bergen, Bergen, Norway.,Department of Neurology, Haukeland University Hospital, Bergen, Norway
| | - Marit Stjern
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU - Norwegian University of Science and Technology, Trondheim, Norway.,Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim, Norway
| | - Petter Moe Omland
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU - Norwegian University of Science and Technology, Trondheim, Norway.,Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim, Norway
| | - Martin Uglem
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, 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, Faculty of Medicine and Health Sciences, NTNU - Norwegian University of Science and Technology, Trondheim, Norway.,Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim, Norway
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