World Hematology 2018 is here today with an interesting fact again with ice -creams. We know that Ice creams have beneficial effect on Blood Vessels but ice creams cause a condition called Brain Freeze. Lets have a look at it today! Here we go……
Known scientifically as sphenopalatine ganglioneuralgia,
brain freeze is thought to be caused by cold solids or liquids passing
over the upper palate of the mouth or back wall of the pharynx.
The
International Headache Society, officially recognises the condition,
caused by the consumption of cold food and drink. Dr Jorge Serrador, a cardiovascular researcher at Harvard Medical School, conducted research which revealed that the pain was brought on by a rapid increase in blood flow
through the anterior cerebral artery, a major blood vessel into the
brain. It is thought the rush of cold blood causes the blood vessels to
dilate, producing that sudden, intense pain as the blood vessels first
open and then close.
“This
happens because of the sudden change in temperature at the roof,”
explained Dr. L. P. Mohan, dental surgeon. “In medical terms, there’s
vasodilatation, (dilatation of blood vessels) triggering local pain
receptors causing prostaglandins to be released, which cause pain, sensitivity and inflammation
at the site of release. This localised pain is taken up by the
trigeminal nerve to send signals to the brain. Since the trigeminal
nerve senses pain from the entire face through its many branches, the
brain interprets the signal of the brain freeze to be coming from the
forehead, hence causing discomfort in that region.
Joseph
Hulihan put it this way: when something cold touches the roof of the
mouth, an alarm goes off. The “cold” signal tells the brain to keep
itself warm, and the rush of blood
builds up pressure that can lead to a headache. There is dilation of
blood vessels, caused by a nerve center located above the roof of the
mouth — when this nerve center gets cold, it seems to over-react.
The
pain associated with brain freezes is the result of rapid cooling and
warming, causing the blood vessels to contract and then dilate quickly.
Our body looks at
the rapid temperature change in the mouth as an indication of a
dangerously cold environment, and so our blood cells contract to
conserve body heat. As the substance is swallowed, our blood cells
return to their previous size and it is this oscillation that is so
painful.
So
how to stop the pain? The pain subsides when the blood vessels return
to normal, so some scientists have suggested putting the tongue against
the roof of the mouth to help warm the blood passing through. Others
think drinking warm water could help increase the temperature of the
mouth.
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