Researchers Find What Causes “Brain Freeze”

    There's a new scientific explanation for the "brain freeze," that very sharp headache you sometimes get from eating something frozen.  The results of the study, conducted jointly by the Harvard Medical School and the War-Related Illness & Injury Study Center - Veterans Affairs NJ Health Care System, connects the phenomenon to triggers of migraines.

    FOX's News Radio's Chris Foster has details:

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    "Brain freeze" may be caused by a defense mechanism keeping the brain warm - the expansion of a blood vessel called the anterior cerebral artery - getting more blood going just long enough to warm things up, backing off before the pressure becomes dangerous, causing that burst of pain that goes away in a few seconds.

    The results, presented at a conference in San Diego.  Volunteers sucked in ice water against the roofs of their mouths, as researchers recorded blood flow through ultrasound.  Other headaches working the same way could be treated by medication constricting that blood vessel.

    Chris Foster, FOX News Radio.