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intense migraine auraMailOnline
•Health
Health
71% Informative
Migraines are thought to affect about 10 per cent of the general population, or 148 million people worldwide.
For about a third of people who experience migraines, the pain is preceded by a wave of strange perceptual effects known as an aura.
For some people, this can manifest in powerful visual effects like flashing zigzag lights, bright colours and temporary blindness.
Some neurologists believe it may be these hallucinations that people describe when they report having a 'vision from God'.
The aura was accompanied by a wave of chemicals which travelled through the fluid surrounding the brain, activating regions which cause the headache.
Scientists now believe that the wave of aura activity sensitises nerves at the surface of the brain which can trigger headaches in some people.
'It seems that the migraine and the aura are separate, but related conditions,' says Dr Holland .
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