| http://www.w3.org/ns/prov#value | - A migraine begins when hyperactive nerve cells send out impulses to the blood vessels, causing constriction, followed by the dilation of these vessels and the release of prostaglandins, serotonin and other inflammatory substances that cause the pulsation to be painful.Certain brain cells that use serotonin as a messenger are involved in controlling mood, attention, sleep and pain.
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