Non-linear electroencephalogram dynamics in patients with spontaneous nocturnal migraine attacks

Strenge, H; Fritzer, Gunther; Göder, Robert; Niederberger, Uwe; Gerber, Wolf‐Dieter; Aldenhoff, Josef B.

doi:10.1016/s0304-3940(01)02047-x

Cited by 20 publications

(17 citation statements)

References 17 publications

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“…The responsiveness of the central nervous system to external or internal stimuli is corresponding to transient changes of the EEG activity and therefore also to the dimensional complexity. Internal physiological changes that occur during sleep can be reflected by different complexities of the EEG signal and was reported by many authors [Ehlers et al, 1991;Röschke and Aldenhoff, 1992;Achermann et al, 1994;Niestroj et al, 1995;Szelenberger et al, 1996;Strenge et al, 2001]. With our results from sleep EEG data, we could confirm these findings.…”

Section: Discussionsupporting

confidence: 90%

Effects of short‐ and long‐term pulsed radiofrequency electromagnetic fields on night sleep and cognitive functions in healthy subjects

Fritzer

Göder

Friege

et al. 2007

Bioelectromagnetics

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There has been wide public discussion on whether the electromagnetic fields of mobile telephones and their base stations affect human sleep or cognitive functioning. As there is evidence for learning and memory-consolidating effects of sleep and particularly of REM sleep, disturbance of sleep by radiofrequency electromagnetic fields might also impair cognitive functions. Previously realized sleep studies yielded inconsistent results regarding short-term exposure. Moreover, data are lacking on the effect that short- and long-term exposure might have on sleep as well as on cognitive functions. Therefore, 10 healthy young male subjects were included and nocturnal sleep was recorded during eight consecutive nights. In the second, third, and last night, we investigated polysomnographic night sleep and cognitive functions. After the adaptation and baseline nights, the participants were exposed to a defined radiofrequency electromagnetic field during the following six nights. We analyzed polysomnographic night sleep according to Rechtschaffen and Kales [1968, Manual of Standardized Terminology, Techniques and Scoring System for Sleep of Human Subjects] as well as by power spectra and correlation dimension. Cognitive functions were investigated by an array of neuropsychological tests. Data analysis was done by comparing the baseline night with the first and last exposure night and the first two sleep cycles of the respective nights. We did not find significant effects, either on conventional sleep parameters or on power spectra and correlation dimension, nor were there any significant effects on cognitive functions. With our results, we are unable to reveal either short-term or cumulative long-term effects of radiofrequency electromagnetic fields on night sleep and cognitive functions in healthy young male subjects.

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Section: Discussionsupporting

confidence: 90%

Effects of short‐ and long‐term pulsed radiofrequency electromagnetic fields on night sleep and cognitive functions in healthy subjects

Fritzer

Göder

Friege

et al. 2007

Bioelectromagnetics

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“…In particular, Goder et al (14) reported that the number of arousals, REM density, α power in REM sleep and β power in SWS (Slow Wave Sleep) are reduced in the nights preceding a migraine attack. Strenge et al (15) performed a non-linear analysis of sleep EEG and observed loss of dimensional complexity in the second sleep cycle of a 'migraine night'. Bruni et al (16), using wrist actigraphy, showed a reduction of nocturnal motor activity of children during the night preceding the migraine attack.…”

Section: Discussionmentioning

confidence: 99%

“…Various anatomical and neurochemical systems are involved in arousal during sleep (10) and several arousal-related structures can be impaired in primary headaches: brainstem (6,11), hypothalamus (12) and thalamo-cortical excitatory cholinergic afferents (13). In addition, a reduction of arousal in the night preceding attacks has been observed in migraine (14)(15)(16), hypnic headache (17) and cluster headache (18).…”

Section: Introductionmentioning

confidence: 99%

Pre-Operative Subarachnoid Haemorrhage in a Patient With Spinal Tumour

Tommasi¹,

Tommasi²,

Lauta

et al. 2006

Cephalalgia

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Primary headaches are closely related to sleep. Modifications in the patterns of arousal during sleep have been reported in migraine, especially in the nights preceding a headache attack. We aimed at evaluating the pattern of arousal from sleep in a group of patients affected by sleep-related migraine. We enrolled 10 consecutive patients, three males and seven females, aged between 20 and 62 years, who presented frequent attacks of migraine without aura (more than five per month), closely related to sleep (more than one-half of the attacks occurred during sleep, causing an awakening). A control group was studied, matched for age and sex. Patients and controls underwent a full-night polysomnographic study, following adaptation; arousal pattern was studied by the scoring of the high-frequency EEG arousal and by the cyclic alternating pattern (CAP). Migraineurs showed a lower CAP rate in non-rapid eye movement (NREM) sleep and, in particular, a lower number of A1 phases (low-frequency, high-amplitude EEG bursts) compared with the controls. Migraineurs also showed a lower index of high-frequency EEG arousals during rapid eye movement (REM) sleep. The reduction in the CAP rate indicates a lower level of arousal fluctuation in NREM sleep. The reduced arousal index in REM suggests a dysfunction in neural structures involved in both the control of REM sleep and the pathophysiology of migraine, such as the hypothalamus and the brainstem.

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“…During pathological conditions, systems demonstrate lower dimensional chaos or even periodicity, e.g. cardiac arrhythmia (16), brain electrical activity during epileptic seizures (17) or nocturnal migraine (18). Measures of chaotic dimension can also offer an alternative approach to predicting pathological change based on time series data that focus on individuals rather than stochastic approaches that draw inferences from a number of subjects.…”

Section: Chaos – the Mother Of Physiologymentioning

confidence: 99%

Migraine — New Perspectives from Chaos Theory

Kernick¹

2005

Cephalalgia

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Converging from a number of disciplines, non-linear systems theory and in particular chaos theory offer new descriptive and prescriptive insights into physiological systems. This paper briefly reviews an approach to physiological systems from these perspectives and outlines how these concepts can be applied to the study of migraine. It suggests a wide range of potential applications including new approaches to classification, treatment and pathophysiological mechanisms. A hypothesis is developed that suggests that dysfunctional consequences can result from a mismatch between the complexity of the environment and the system that is seeking to regulate it and that the migraine phenomenon is caused by an incongruity between the complexity of mid brain sensory integration and cortical control networks. Chaos theory offers a new approach to the study of migraine that complements existing frameworks but may more accurately reflect underlying physiological mechanisms.

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Non-linear electroencephalogram dynamics in patients with spontaneous nocturnal migraine attacks

Cited by 20 publications

References 17 publications

Effects of short‐ and long‐term pulsed radiofrequency electromagnetic fields on night sleep and cognitive functions in healthy subjects

Effects of short‐ and long‐term pulsed radiofrequency electromagnetic fields on night sleep and cognitive functions in healthy subjects

Pre-Operative Subarachnoid Haemorrhage in a Patient With Spinal Tumour

Migraine — New Perspectives from Chaos Theory

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