Deep in the brain: Changes in subcortical function immediately preceding a migraine attack
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© 2018 Wiley Periodicals, Inc. The neural mechanism responsible for migraine remains unclear. While the role of an external trigger in migraine initiation remains vigorously debated, it is generally assumed that migraineurs display altered brain function between attacks. This idea stems from relatively few brain imaging studies with even fewer studies exploring changes in the 24 h period immediately prior to a migraine attack. Using functional magnetic resonance imaging, we measured infra-slow oscillatory activity, regional homogeneity, and connectivity strengths of resting activity in migraineurs directly before (n = 8), after (n = 11), and between migraine attacks (n = 26) and in healthy control subjects (n = 78). Comparisons between controls and each migraine group and between migraine groups were made for each of these measures. Directly prior to a migraine, increased infra-slow oscillatory activity occurred in brainstem and hypothalamic regions that also display altered activity during a migraine itself, that is, the spinal trigeminal nucleus, dorsal pons, and hypothalamus. Furthermore, these midbrain and hypothalamic sites displayed increased connectivity strengths and regional homogeneity directly prior to a migraine. Remarkably, these resting oscillatory and connectivity changes did not occur directly after or between migraine attacks and were significantly different to control subjects. These data provide evidence of altered brainstem and hypothalamic function in the period immediately before a migraine and raise the prospect that such changes contribute to the expression of a migraine attack.
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Marciszewski, K.K.; Meylakh, N.; Harrington, Flavia ; Mills, E.P.; Macefield, V.G.; Macey, P.M.; Henderson, L.A. (2018)© 2018 the authors. The neural mechanism responsible for migraine remains unclear. While an external trigger has been proposed to initiate a migraine, it has also been proposed that changes in brainstem function are ...
Fluctuating regional brainstem diffusion imaging measures of microstructure across the migraine cycleMarciszewski, K.K.; Meylakh, N.; Harrington, Flavia ; Macefield, V.G.; Macey, P.M.; Henderson, L.A. (2019)© 2019 Marciszewski et al. The neural mechanisms responsible for the initiation and expression of migraines remain unknown. Although there is growing evidence of changes in brainstem anatomy and function between attacks, ...
Marciszewski, K.K.; Meylakh, N.; Harrington, Flavia ; Macefield, V.G.; Macey, P.M.; Henderson, L.A. (2018)© 2017, © International Headache Society 2017. Background: The exact mechanisms responsible for migraine remain unknown, although it has been proposed that changes in brainstem anatomy and function, even between attacks, ...