Intrinsic brain activity triggers trigeminal meningeal afferents in a migraine model


Bolay H. B. , Reuter U., Dunn A., Huang Z., Boas D., Moskowitz M.

NATURE MEDICINE, cilt.8, sa.2, ss.136-142, 2002 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 8 Konu: 2
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1038/nm0202-136
  • Dergi Adı: NATURE MEDICINE
  • Sayfa Sayıları: ss.136-142

Özet

Although the trigeminal nerve innervates the meninges and participates in the genesis of migraine headaches, triggering mechanisms remain controversial and poorly understood. Here we establish a link between migraine aura and headache by demonstrating that cortical spreading depression, implicated in migraine visual aura, activates trigeminovascular afferents and evokes a series of cortical meningeal and brainstem events consistent with the development of headache. Cortical spreading depression caused long-lasting blood-flow enhancement selectively within the middle meningeal artery dependent upon trigeminal and parasympathetic activation, and plasma protein leakage within the dura mater in part by a neurokinin-1-receptor mechanism. Our findings provide a neural mechanism by which extracerebral cephalic blood flow couples to brain events; this mechanism explains vasodilation during headache and links intense neurometabolic brain activity with the transmission of headache pain by the trigeminal nerve.