| 1. |
- Ichesco, Eric, et al.
(författare)
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Altered Functional Connectivity Between the Insula and the Cingulate Cortex in Patients With Temporomandibular Disorder: A Pilot Study.
- 2012
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Ingår i: Headache. - : Wiley. - 1526-4610. ; 52, s. 441-454
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Tidskriftsartikel (refereegranskat)abstract
- Background.- Among the most common chronic pain conditions, yet poorly understood, are temporomandibular disorders (TMDs), with a prevalence estimate of 3-15% for Western populations. Although it is increasingly acknowledged that central nervous system mechanisms contribute to pain amplification and chronicity in TMDs, further research is needed to unravel neural correlates that might abet the development of chronic pain. Objective.- The insular cortex (IC) and cingulate cortex (CC) are both critically involved in the experience of pain. The current study sought specifically to investigate IC-CC functional connectivity in TMD patients and healthy controls (HCs), both during resting state and during the application of a painful stimulus. Methods.- Eight patients with TMD, and 8 age- and sex-matched HCs were enrolled in the present study. Functional magnetic resonance imaging data during resting state and during the performance of a pressure pain stimulus to the temple were acquired. Predefined seed regions were placed in the IC (anterior and posterior insular cortices) and the extracted signal was correlated with brain activity throughout the whole brain. Specifically, we were interested whether TMD patients and HCs would show differences in IC-CC connectivity, both during resting state and during the application of a painful stimulus to the face. Results.- As a main finding, functional connectivity analyses revealed an increased functional connectivity between the left anterior IC and pregenual anterior cingulate cortex (ACC) in TMD patients, during both resting state and applied pressure pain. Within the patient group, there was a negative correlation between the anterior IC-ACC connectivity and clinical pain intensity as measured by a visual analog scale. Conclusions.- Since the pregenual region of the ACC is critically involved in antinociception, we hypothesize that an increase in anterior IC-ACC connectivity is indicative of an adaptation of the pain modulatory system early in the chronification process.
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| 2. |
- Edvinsson, Lars
(författare)
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Neuronal signal substances as biomarkers of migraine
- 2006
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Ingår i: Headache. - : Wiley. - 1526-4610. ; 46:7, s. 1088-1094
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Tidskriftsartikel (refereegranskat)abstract
- Of the sensory nervous system associated signal substances it is only calcitonin generelated peptide (CGRP) that is reliably associated with the degree of pain in the acute attacks of primary headaches. The treatment with triptans alleviates both the pain and the associated CGRP release, putatively via a presynaptic effect on the sensory nerves. The studies of opoids and other sensory neuropeptides are inconsistent and require further analysis. Initial positive data on endothelin and its receptors have turned out negative. Nitric oxide mechanisms are still debated both in terms of initiation of attacks and for the treatment.
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| 3. |
- Persson, Bertil
(författare)
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Growth environment and personality in adult migraineurs and their migraine-free siblings
- 1997
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Ingår i: Headache. - : Wiley. - 1526-4610. ; 37:3, s. 159-168
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the study was to compare adult migraine discordant full siblings in terms of personality and psychosocial environment during childhood. The study, involving 30 sibling pairs and use of various personality instruments (Eysenck Personality Inventory [EPI], Color Word Test [CWT], Visual Aftereffects [VAE], Meta Contrast Technique [MCT], Cesarec-Marke Personality Schedule), showed the migraineurs scored significantly higher on neuroticism [EPI], also called emotional stress or trait anxiety; to be more sensitive (MCT); and to display signs of greater anxiety (VAE, CWT). Furthermore, migraineurs tended to report greater scarcity of friends during childhood and less verbal, as well as, nonverbal encouragement from their parents, than their migraine-free siblings. Neuroticism was found to correlate significantly with migraine, but not with headache frequency or severity in the migraine group. It is argued that, due to the high neuroticism of some migraineurs, psychotherapy should be considered as an alternative to other prophylactic treatments such as use of beta-adrenoceptor blockers, although the acute migraine onset should be pharmacologically treated.
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| 6. |
- Dahlöf, Carl, 1947, et al.
(författare)
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The course of frequent episodic migraine in a large headache clinic population: a 12-year retrospective follow-up study.
- 2009
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Ingår i: Headache. - : Wiley. - 1526-4610. ; 49:8, s. 1144-52
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Despite its high prevalence, little is known about the clinical course of migraine. Presented here are the findings of a 12-year follow-up study involving patients diagnosed at baseline with frequent episodic migraine. OBJECTIVE: The main objectives were to determine the long-term outcome of patients with frequent episodic migraine and to identify factors predictive of a favorable vs less favorable prognosis. METHODS: A total of 374 subjects (200 women, 174 men) were selected randomly from a total population of 2812 patients initially diagnosed before December 31, 1996, with episodic migraine and at baseline experiencing 1 to 6 attacks per month. Their subsequent migraine course was evaluated via telephone interviews conducted between 2005 and 2006. RESULTS: Migraine attacks had ceased in 110 (29%) of the 374 patients (57 women and 53 men). The remaining 264 subjects continued to experience migraine attacks at follow-up, and a change in attack frequency was reported by 80% (of whom 80% reported fewer attacks). Sixty-six percent reported a change in pain intensity over time, and of these 83% reported milder pain. Only 6 subjects (6/374 = 1.6%) had developed chronic migraine. CONCLUSION: These data from a headache clinic population suggest that migraine has a favorable prognosis in most patients. Whether the findings reflect the natural history of the disorder or interval improvements in headache management remains conjectural.
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| 7. |
- Ekbom, K, et al.
(författare)
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Cluster headache and aura
- 2009
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Ingår i: Headache. - : Wiley. - 1526-4610. ; 49:5, s. 786-787
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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