Insomnia and circadian variation of attacks in episodic migraine

OBJECTIVES: To assess the influence of insomnia on the 24-hour temporal pattern of migraine. BACKGROUND: Migraine attacks have been reported to occur in a harmonic (monophasic) or a biphasic 24-hour cyclic manner, and in some studies to have preponderance in the morning hours. The influence of insomnia on the circadian pattern has not been evaluated. METHOD: Based on a previous study of the circadian variation in migraine, an explorative data analysis was made to compare the circadian pattern of insomnia-related migraine attacks to the circadian pattern of migraine attacks not related to insomnia. If the patients reported difficulties in falling asleep and/or maintaining sleep the night prior to the reported attack or the night the attack occurred, the attack was defined as insomnia-related. Relapses were not counted as distinctive attacks. RESULTS: Sixty-eight female migraineurs (mean +/- SD age: 35.5 +/- 7.0) prospectively recorded 1869 migraine attacks. Five hundred-and-thirty-three attacks (29%) were insomnia-related. Insomnia-related attacks had a biphasic temporal pattern with one peak in the morning hours and one peak after noon. They had a preponderance in the morning hours compared to attacks not related to insomnia (t= 3.27, df = 62, P= .002). In 79% of attacks insomnia was experienced prior to the headache. CONCLUSIONS: Episodic morning migraine is associated with insomnia. The cause and consequences of insomnia in migraine is not clarified, but sleep obviously protects against attacks rather than provokes them.     

Sleeping behavior and migraine. An evaluation by daily self-reports

PROBLEM: Regarding the coherence of sleeping behavior and the occurrence of migraine attacks, we conducted a study based on migraine and sleeping diaries. METHODS: Besides the daily recording of times of falling asleep and waking up, duration of sleep, sleep disruption and quality of sleep, clinical migraine parameters like occurrence of migraine attacks, headache intensity and duration and the daily mood rating were registered over periods of at least 6 weeks. In the analyses, we defined two classes of events: (1) nights not followed by a migraine attack; (2) nights followed by migraine. We examined a retrospective sample (23 patients with altogether 580 attacks) and a prospective sample (16 patients with altogether 96 attacks). RESULTS: In both samples, we found that the duration of sleep was significantly reduced in nights followed by migraine (6.8 vs. 8.1 h and 6.4 vs. 7.2 h respectively) due to earlier awakening, with unchanged time of falling asleep. Up to two thirds of the observed migraine attacks were reported to be present directly after awakening. Quality of sleep was markedly reduced in nights followed by a migraine attack (i.e. sleep disruptions, feeling exhausted/no feeling of restedness when wakening up). We found only weak and insignificant correlations between the foregoing daily mood rating and the quantitative parameters of sleeping behavior on nights followed by migraine; somewhat more pronounced correlations were observable between the mood rating and the qualitative sleep parameters. CONCLUSIONS: Overall, we conclude that the observed changes in sleeping behavior are largely part of the migraine attack, with the possibility that REM sleep functions as a migraine trigger. In clinical application, we strongly recommend the use of daily self-observations of patients' sleep-related behaviors in the migraine diary, identifying migraine-prone sleeping habits and evaluating their potency for triggering migraine attacks.     

Normobaric hypoxia and nitroglycerin as trigger factors for migraine

Migraine prevalence is increased in high-altitude populations and symptoms of acute mountain sickness mimic migraine symptoms. Here we tested whether normobaric hypoxia may trigger migraine attacks. As positive control we used nitrolgycerin (NTG), which has been shown to induce migraine attacks in up to 80% of migraineurs. Sixteen patients (12 females, mean age 28.9 +/- 7.2 years) suffering from migraine with (n = 8) and without aura (n = 8) underwent three different provocations (normobaric hypoxia, NTG and placebo) in a randomized, cross-over, double dummy design. Each provocation was performed on a separate day. The primary outcome measure was the proportion of patients developing a migraine attack according to the criteria of the International Headache Society within 8 h after provocation onset. Fourteen patients completed all three provocations. Migraine was provoked in six (42%) patients by hypoxia, in three (21%) by NTG and in two (14%) by placebo. The differences among groups were not significant (P = 0.197). The median time to attacks was 5 h. In conclusion, the (remarkably) low response rate to NTG is surprising in view of previous data. Further studies are required to establish fully the potency of hypoxia in triggering migraine attacks.     

Sleep and migraine: an actigraphic study

The aim of the study was to evaluate sleep of children with migraine during the interictal period and the modifications of sleep which precede, are concomitant with, or follow migraine attacks. Eighteen patients with migraine without aura were compared with a group of 17 healthy age-matched children. Sleep parameters were monitored for two full weeks by means of actigraphs and self-report diaries. Headache diaries were also filled out in order to evaluate the occurrence and the characteristics of migraine attacks. Fifty-seven attacks were recorded during the monitoring period. During the interictal period, sleep parameters of children suffering from migraine did not differ from those of controls; only sleep onset latency was slightly prolonged in the migraine group. Timing of the attack affected nocturnal motor activity which presented the lowest values on the night preceding the attack, indicating a decrease in cortical activation during sleep preceding migraine attacks. Further studies should clarify if the observed reduction in nocturnal motor activity close to the attack is related to neurotransmitter imbalance.     

Effect of age on the fulfilment of the IHS criteria for migraine in children at a headache clinic

In a headache clinic, 247 children suffering from severe recurrent headaches were studied in relation to the IHS criteria for migraine. Of the 247, 163 had migrainous headache, with 110 (67.5%) of these having migraine in accordance with the IHS criteria. The remaining 53 (32.5%) had headache attacks fulfilling all but one of the IHS criteria. Coverage of the IHS criteria for migraine was 93%. Symptoms of unilateral headache, aggravation by physical activity, and nausea showed the greatest differences in frequency between those with migraine and those with probable migraine. All children with aura fulfilled criteria for migraine. Children with migraine with aura (11.8, 95% CI: 11.0–12.6 years) were older than those without aura (10.1, 9.4–10.8 years; p = 0.001). Children with pulsating headache were slightly older than children without pulsating headache. No differences in age were detected for the other IHS criteria.     

Cold Therapy in Migraine Patients: Open-label, Non-controlled, Pilot Study

Some patients with headache report that they have frequently used physical therapies such as application of cold to relieve their headache. There are only a few reported studies related to cold therapies in patients with migraine. In this study, we investigated the effect of cold application on migraine patients. Twenty-eight migraine patients were included. Cold therapy was administered to them by gel cap. Patients used this cap during their two migraine attacks. Before and after the cold therapy, headache severity was recorded by using visual analogue scale (VAS). Patients used this cap for 25 min in each application. They recorded their VAS score just after the therapy and 25 min, 1 h, 2 h and 3 h later. Two patients could not use this therapy due to side effects (one due to cold intolerance and one due to vertigo) in both applications. Therefore, therapeutic efficacy was evaluated in 26 patients. Twenty-five minutes after treatment of the first attack, VAS score was decreased from 7.89 +/- 1.93 to 5.54 +/- 2.96 (P < 0.01). Twenty-five minutes after treatment of the second attack, VAS score was decreased from 7.7 +/- 1.8 to 5.4 +/- 3.55 (P < 0.01). Cold application alone may be effective in some patients suffering from migraine attacks. Its combination with conventional drugs should be investigated in future studies.     

Jactatio extra-capitis and migraine suppression

Sleep often terminates migraine headaches, and sleep disorders occur with greater prevalence in individuals with chronic or recurrent headaches. Rhythmic head, limb or body movements are common in children before falling asleep, but they very rarely persist into adolescence and adulthood, or appear de novo later in life as sleep-related rhythmic movement disorders. A 22-year-old female with migraine without aura and history of early childhood pre-dormital body rocking (jactatio) discovered that unilateral slow rhythmic movements of her right foot greatly facilitated falling sound asleep while reclining. Sleep served every time to terminate her migraine attack. Rhythmic movements may serve on occasion as a therapeutic hypnotic maneuver in migraine sufferers.     

Traumatisch ausgelöste Migräneattacken (TAMA) Eine Literaturübersicht

In children and young adults migraine attacks can be triggered by mild head injury. The literature on this syndrome was surveyed and 50 case reports found to meet the latest criteria of classification requiring at least two similar attacks for diagnosis of migraine (except for common migraine which was excluded from review). 33 subjects had at least one trauma-triggered attack and one identical or similar spontaneous attack, 17 cases at least two similar or identical trauma triggered attacks. An analysis of all cases showed the following features: The symptoms of migraine mostly start with a latency between one and thirty minutes after the injury and dissolve within one day. First attacks without mention of headache were mainly found in children younger than 8 years. Trauma-triggered migraine attacks are well documented for familial hemiplegic migraine, migraine attacks with hemispheric symptoms and attacks with disturbances of consciousness, while the view that posttraumatic transient cortical blindness and transient global amnesia are migraine attacks is insufficiently supported. A hereditary predisposition for a traumatic trigger mechanism seems to be present at least in familial hemiplegic migraine. Nosologic relations to syndromes of secondary neurological deterioration after mild head injury in childhood are discussed.     

Migraine in children – an evaluation of the IHS criteria

The purpose of the present study was to compare the new criteria by the International Headache Society (IHS) with criteria for the definition of childhood migraine previously used. In particular, we considered the problem of the minimally acceptable headache duration in children. In a postal questionnaire, 36.5% of 3580 children 8–9 years old reported headache attacks. Ninety-five children (2.7%) fulfilled the IHS criteria. Three percent fulfilled the previously used migraine definition of Vahlquist. Some of the children in the latter group had considerably shorter headache attacks than those of the IHS patients, but otherwise their symptoms were very similar. When the IHS criterion of headache attack duration was lowered from a minimum of 2 h to 1 h, or omitted, the number of migraine patients increased from 95 to 114 and 127, respectively.     

Attitudes and burden of disease among self-considered migraineurs--a nation-wide population-based survey in Sweden

The authors have earlier reported a 1-year prevalence of 13.2 +/- 1.9% for migraine in Sweden. This is a subsequent extensive postal survey of the burden of disease and attitudes among migraineurs in a sample (n = 423, 23% men and 77% women, aged 18-74 years) randomly recruited from all main regions of the country, representative of adults in the general Swedish population with self-considered migraine. Results are presented only from participants who after analysis of symptoms were found to fulfil the International Headache Society's migraine criteria. In order to assess headache duration open-mindedly, the strict time criterion 4-72 h was deliberately disregarded as an inclusion criterion. Individuals who did not consider themselves to have migraine were excluded. Less than half of the group (45%) had received a diagnosis of migraine from a physician. Accordingly, a large number of individuals that would not have come to attention in a clinic-based study have been included. The mean attack frequency was 1.3 per month, and the number of attacks per year in Swedish adults is approximately 10 million. A minority (27%) of sufferers have a majority (68%) of all attacks. The mean attack duration was 19 h. A considerable number of individuals reported attacks < 4 h (15.8%) or > 72 h (6.4%). Less than half of the individuals recovered completely between the attacks. Despite this, only every fourth (27%) participant was currently consulting a physician (6% regularly; 21% occasionally). Most of the migraineurs reported absence from school or work, a negative influence of migraine on the most important aspects of life, and an interest in testing other treatments for migraine during the last year. Of those (n = 231) migraineurs who had consulted a physician, about 60% were satisfied with information given or treatment offered. This implies, however, that there is still room for improvement in the management of migraine in Sweden.     

Migraine headaches and sleep disturbances in children

OBJECTIVE: The aim of the present study was to investigate the prevalence of sleep disturbances in children with migraine headaches and to describe individual differences in sleep behaviors based on headache features (eg, frequency, duration, intensity). BACKGROUND: A relationship between migraine headaches and sleep disturbances has been suggested in both children and adults, but there is a lack of research examining the relationship between specific headache features and the range of sleep behaviors in children. METHODS: One hundred eighteen children, aged 2 to 12 years (mean, 9.1; standard deviation, 2.3) were evaluated for headaches at two pediatric neurology departments. Parents completed the Children's Sleep Habits Questionnaire and a standardized questionnaire regarding headache characteristics. RESULTS: Parents reported a high rate of sleep disturbances in children, including sleeping too little (42%), bruxism (29%), child co-sleeping with parents (25%), and snoring (23%). Children with migraine headaches experienced more sleep disturbances compared to published healthy control norms. After controlling for child demographics, we found that the frequency and duration of migraine headaches predicted specific sleep disturbances, including sleep anxiety, parasomnias, and bedtime resistance. CONCLUSIONS: Children with migraine headaches have a high prevalence of sleep disturbances. The direction of the relationship between headaches and sleep is unknown. Regardless, interventions targeting sleep habits may improve headache symptoms, and effective treatment of headaches in children may positively impact sleep.     

Topographic EEG mapping in childhood headaches

The clinical distinction between migraine without aura and tension headache is more difficult in young children than it is in adults. The objective of this study was to examine the usefulness of topographic EEG mapping, as one method among other diagnostic techniques, for establishing a diagnosis. The clinical diagnosis of tension headache and migraine in children between 6 and 15 years of age was established according to criteria of the International Headache Society classification. Children with migraine and tension headache were examined during and between attacks. EEG mapping showed lateralized parietal diminution of alpha-power more frequently during an attack of migraine than during tension headache, which regressed between attacks. Compared to other methods, such as visual evoked potentials, EEG mapping may have the advantage of helping to diagnose each single headache, which could be useful in patients with combined headaches.     

Early treatment of migraine with rizatriptan: a placebo-controlled study

OBJECTIVE: To evaluate the efficacy of rizatriptan when administered early during a migraine attack. BACKGROUND: Several studies indicate that triptans are more efficacious when administered early during a migraine attack, when the pain is still mild. METHODS: One hundred and twelve rizatriptan-na?ve patients aged 20 to 64 years with a history of migraine with or without aura that progressively worsened when left untreated were instructed to treat a total of three migraine attacks with either rizatriptan 10 mg or placebo as early as possible during each attack. Seventy-four patients (68 women and 6 men) were assigned to use the active drug and 38 (35 women and 3 men) to placebo. The primary efficacy endpoint was pain-free response at 2 hours after administration of the study drug. Secondary efficacy measures were pain-free response at 1 hour and sustained pain-free response lasting between 2 and 24 hours. RESULTS: A total of 216 attacks were treated in the rizatriptan group and 109 in the placebo group. Pain-free response at 2 hours after early treatment was noted in 151 (70%) of attacks in the rizatriptan group and in 24 (22%) in the placebo group (P < .01). Pain-free response at 1 hour occurred in 97 (45%) and 9 (8%) attacks, respectively (P < .01). When the attacks were categorized by headache severity at the time of treatment, the pain-free response at 2 hours was higher for mild attacks than for moderate or severe attacks (P < .01). Sustained pain-free response after treatment was significantly higher for attacks treated with rizatriptan (60%) than for those treated with placebo (17%) (P < .001). Adverse events were observed in 62 patients in the rizatriptan group and 15 in the placebo group. Only 1 patient taking rizatriptan discontinued the study because of adverse events, and no serious adverse events were reported. CONCLUSIONS: Rizatriptan is significantly more likely than placebo to produce a pain-free response within 2 hours when the drug is administered early in the migraine attack, when pain is mild rather than moderate or severe.     

Migraine in childhood and its prognosis

In 1955 a population study in Uppsala comprising about 9,000 school children showed that migraine increased from 1.4% at the age of seven to 5.3% at fifteen. With increasing age there was an increasing predominance of girls. A matched comparison between 73 children with more pronounced migraine and 73 control children showed a greater tendency in the migraine group to abdominal pain, motion sickness, sleep disturbance and orthostatic symptoms. In a longitudinal study lasting 23 years the 73 migraine children were followed-up until all were over 30 years of age. During puberty and as young adults 62% were free from migraine for at least two years. Of these, 22% again suffered migraine regularly. Thus, 60% had migraine attacks at 30. Girls seem to have a greater relapse rate than boys. Most of the girls with classical migraine were headache free during pregnancy. Every third family with one parent belonging to the migraine group and with children over four years of age had one child with migraine symptoms. Migraine seems to be more frequently inherited via the mother, and to girls.     

Ophthalmoplegia With Migraine in Adults: Is It Ophthalmoplegic Migraine?

Objective.— Ophthalmoplegic migraine (OM) is a rare disorder characterized by recurrent oculomotor nerve palsy in children, following migraine headaches. We report 62 adults, seen consecutively, who developed acute ophthalmoplegia with severe attacks of migraine over a 10-year (1996-2005) period. An overwhelming majority of these patients had an antecedent worsening in severity of migraine headaches, before the ophthalmoplegic attack.
Methods.— Sixty-two patients, aged 15-68 years, with an acute attack of OM underwent detailed clinical, biochemical, and neuroradiological evaluation.
Results.— There were 62 patients with 86 attacks of OM. Whereas 48 patients had a single attack, 14 had 2 or more attacks, fulfilling the International Headache Society criteria for probable and definite OM, respectively. At presentation, isolated abducens, oculomotor, and trochlear nerve involvements were seen in 35 (56.5%), 21 (33.9%), and 5 (8.1%) patients, respectively. One patient had simultaneous involvement of 3rd and 6th nerves. Fifty-one (82.3%) patients exhibited an antecedent worsening in severity of migraine, before developing ophthalmoplegia during (59/95.2%) or within 24 hours (3/4.8%) of a severe migraine attack, respectively. Detailed biochemistry and cranial neuroimaging were normal. No case had any nerve enhancement. Use of steroids hastened recovery ( P  < .05).
Conclusion.— We conclude: (1) OM in adults is characterized by single attacks of ophthalmoplegia in a great majority of patients; and (2) 6th nerve involvement occurs commonly. Our results indicate that moving OM to the chapter on cranial neuralgias in the second edition of the International Headache Classification may be premature, since nerve palsy occurred during a severe migraine attack in all patients.     

Polysomnographic findings in nights preceding a migraine attack

Sleep recordings were performed in eight patients to analyse sleep alterations preceding migraine attacks. Polysomnographic recordings from nights before an attack were compared with nights without following migraine. We analysed standard sleep parameters and electroencephalogram (EEG) power spectra. The main findings preceding migraine attacks were a significant decrease in the number of arousals, a decrease in rapid eye movement (REM) density, a significant decrease of beta power in the slow wave sleep, and a decrease of alpha power during the first REM period. The results suggest a decrease in cortical activation during sleep preceding migraine attacks. According to the models of sleep regulation, alterations in the function of aminergic or cholinergic brainstem nuclei have to be discussed.     

Acute confusional migraine attacks resolved by sleep: lack of significant abnormalities in post-ictal polysomnograms

We observed acute confusional migraine (ACM) attacks in two adolescents, and in both cases the episodes ended when the patients fell asleep spontaneously. Laboratory and neuroradiologic examinations were unremarkable. The post-ictal polysomnograms displayed a regular quality and duration of the physiologic components of sleep. Random posterior slow waves occurred only during the nocturnal awakenings and REM periods. The observation that sleep may resolve migraine attacks is emphasized. ACM is characterized by peculiar and relatively quickly reversible clinical manifestations and EEG abnormalities. The lack of significant abnormalities in post-ictal polysomnograms corresponds to a functional integrity of the brainstem structures involved in the global organization of sleep and may represent a useful laboratory feature in the diagnosis of ACM.     

Patient-reported benefits of rizatriptan compared with usual non-triptan therapy for migraine in a primary care setting

The purpose of this open-label study was to compare rizatriptan with usual non-triptan therapy for migraine in patients who had never received a triptan. Patient-reported outcomes were examined for a prestudy migraine attack and after three consecutive study attacks, the first and third treated with rizatriptan 10 mg wafer and the second with usual non-triptan therapy. A total of 97 patients (83% women; mean age 39 years) completed the study. Two-thirds of patients reported severe or total disability during migraine attacks. All comparisons between rizatriptan therapy and usual non-triptan therapy significantly favoured rizatriptan (p < or = 0.01). Headache relief by 2 hours was reported by 78-83% of patients after rizatriptan and by 46-48% of patients after usual therapy; 41-47% and 12-18%, respectively, were pain free at 2 hours. Patient satisfaction and migraine-specific quality-of-life scores were also significantly better for attacks treated with rizatriptan. At study end, 62% and 17% of patients were very or completely satisfied with rizatriptan and usual non-triptan therapy, respectively. Among those patients who worked for pay, therapy with rizatriptan significantly reduced absenteeism and improved the amount and quality of time at work compared with usual non-triptan therapy. Allowing patients to have experience with rizatriptan may improve the level of medical care for migraine attacks.     

Psychological functioning of children who have recurrent migraine

Thirty-two children experiencing recurrent migraine, aged 8-17, were compared to 32 non-headache peer controls matched for age, sex, and social class. Each child completed an extensive battery of psychological tests, which consisted of (1) the Children's Depression Inventory (for children aged 8-13) or the Beck Depression Inventory (for children 14 and above), (2) the State-Trait Anxiety Inventory for Children (ages 8-12) or the State-Trait Anxiety Inventory, Form X (ages 13 and above), (3) the Children's Depression Rating Scale, (4) the Personality Inventory for Children, (5) the Child Behavior Checklist, (6) the Psychosomatic Symptom Checklist, SUNYA Revision, (7) the Children's Social Readjustment Rating Questionnaire, (8) the Wide Range Achievement Test for Reading, and (9) the Peabody Picture Vocabulary Test, Form L. Children with migraine revealed higher scores on all scales measuring depression and somatic complaints; adolescent headache sufferers also revealed increased levels of trait anxiety. Older male headache sufferers revealed the poorest overall level of adjustment as reflected by scores on the Adjustment scale of the Personality Inventory for Children. It was argued that the psychological differences were most likely a consequence of the migraineurs having to live with frequent, unpredictable attacks of intense pain. However, the correlational nature of this study does not make it possible to rule out alternative explanations.