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QUESTION 1: According to Chawla (2016), there are many factors that have been implicated in the pathogenesis of migraine but none of them have been proven to be an absolute mechanism. The proposed theories are vascular theory, neurovascular theory, cortical spreading depression, brainstem activation, magnesium deficiency and endothelial dysfunction.
QUESTION 2:
According to mayoclinic.org (2016), migraine is a multi stage process and usually presents and progress through four stages. These four stages are prodrome, aura, pain in head and finally post-drome. The prodrome stage may ...
