there are at the moment two important theories concerning the cerebral mechanisms of migraine : the vascular theory which attributes migraine to spasm of a cerebral artery causing local hypoxia and transient focal symptoms followed by neurogenically mediated extra- and/or intracranial vasodilation causing headache , i.e . migraine is understood in terms of a primary perturbation of blood vessel function .
C0018681
headache
C0149931
migraine