Serrador and his colleagues speculate that the dilation, then quick constriction, may be a type of self-defense for the brain. "The brain is one of the relatively important organs in the body, and it needs to be working all the time," he explains. "It's fairly sensitive to temperature, so vasodilation might be moving warm blood inside tissue to make sure the brain stays warm." But because the skull is a closed structure, Serrador adds, the sudden influx of blood could raise pressure and induce pain. The following vasoconstriction may be a way to bring pressure down in the brain before it reaches dangerous levels.Which is a far more satisfying answer than Dr Whatshisname's answer ("Brain Confusion") in that Baylor additional insight link. And perhaps suggests why some people feel Brain Freeze in their shoulders (or in the center of their upper backs, as I often experienced as a child). Anybody know the courses of the cerebral arteries?
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posted by gngstrMNKY at 1:07 AM on April 24, 2012