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Insomnia and circadian variation of attacks in episodic migraine

Karl Alstadhaug1, Rolf Salvesen, Svein Bekkelund

  • 1Department of Neurology, Nordlandssykehuset, Bodø, Norway.

Headache
|September 22, 2007
PubMed
Abstract

Insights

Insomnia is linked to episodic morning migraine attacks, showing a biphasic temporal pattern with peaks in the morning and afternoon. Sleep may protect against, rather than provoke, these migraine events.

Area of Science:

  • Neurology
  • Sleep Medicine
  • Chronobiology

Background:

  • Migraine attacks exhibit varied 24-hour patterns, including morning predominance.
  • The impact of insomnia on migraine's circadian rhythm remains underexplored.

Purpose of the Study:

  • To investigate how insomnia influences the 24-hour temporal distribution of migraine attacks.
  • To compare the circadian patterns of insomnia-related versus non-insomnia-related migraines.

Main Methods:

  • Explorative data analysis of prospectively recorded migraine attacks from 68 female participants.
  • Defined insomnia-related attacks based on sleep difficulties preceding or during the headache.
  • Compared temporal patterns of insomnia-related (29% of attacks) and non-insomnia-related migraines.

Main Results:

  • Insomnia-related migraine attacks displayed a biphasic pattern with morning and afternoon peaks.
  • These attacks showed a significant morning preponderance compared to non-insomnia-related attacks (P=.002).
  • In 79% of cases, insomnia preceded the headache onset.

Conclusions:

  • Episodic morning migraine is associated with insomnia.
  • The relationship between insomnia and migraine requires further clarification.
  • Sleep appears to be protective against migraine attacks, not a trigger.

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