What is the vascular theory of migraine headache pathophysiology?

Updated: Oct 21, 2019
  • Author: Jasvinder Chawla, MD, MBA; Chief Editor: Helmi L Lutsep, MD  more...
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Answer

The mechanisms of migraine remain incompletely understood. However, new technologies have allowed formulation of current concepts that may explain parts of the migraine syndrome.

Vascular theory

In the 1940s and 1950s, the vascular theory was proposed to explain the pathophysiology of migraine headache. Wolff et al believed that ischemia induced by intracranial vasoconstriction is responsible for the aura of migraine and that the subsequent rebound vasodilation and activation of perivascular nociceptive nerves resulted in headache.

This theory was based on the following 3 observations:

  • Extracranial vessels become distended and pulsatile during a migraine attack

  • Stimulation of intracranial vessels in an awake person induces headache

  • Vasoconstrictors (eg, ergots) improve the headache, whereas vasodilators (eg, nitroglycerin) provoke an attack


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