Chorea-a twinkling movement or motor scintillation-does not have its origin in the cerebral cortex, but in the deeper parts of the brain, the basal ganglia and upper brainstem, which are the parts that mediate normal awakening. Thus these observations of chorea during migraine support the notion that migraine is a form of arousal disorder, something located in the strange borderlands of sleep-a disorder which has its origin deep in the brainstem, and not superficially, in the cortical mantle, as is often supposed {a
( Oliver Sacks )
[ Migraine ]
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