To investigate migraine with aura symptoms during and after hypoxia.
With magnetic resonance imaging the investigators will investigate changes in
* regional cerebral blood flow (rCBF)
* resting state functional connectivity
* circumference of the middle cerebral artery(MCA), internal carotic artery, superficial temporal artery, medial meningeal artery, external carotic artery
* brain metabolism
And compare these changes with a aged match healthy control group.
