Middle meningeal artery dilatation in migraine.
OBJECTIVE
To show that migraine pain is not related to dilatation of the dural meningeal arteries.


BACKGROUND
The origin of the pain in migraine has not yet been adequately explained and remains the subject of vigorous debate. Current theories implicate changes in the trigeminovascular system, which is defined as comprising the large intracranial vessels, and in particular, the dural meningeal vessels, the dura mater, and their neural connections.


METHODS
The anatomical relationships of the dural meningeal arteries to the dura mater and the inner surface of the calvarium are described.


RESULTS
The dural meningeal arteries lie in grooves in the inner table of the calvarium, are encased in the unyielding fibrous dura mater, and are consequently unable to dilate.


CONCLUSIONS
The pain of migraine is not related to dilatation of the dural meningeal arteries.
Shevel
Elliot
E
The Headache Clinic, Houghton, South Africa.
D004388:Dura Mater / Q000033:anatomy & histology / Q000098:blood supply; D006801:Humans; D008576:Meningeal Arteries / Q000033:anatomy & histology / Q000473:pathology*; D008881:Migraine Disorders / Q000209:etiology / Q000473:pathology*; D014664:Vasodilation