Whether the nerve is specifically responding to the cold or a sudden reduction of blood and oxygen supply to the brain – or both – is unclear. Some scientists believe the trigeminal nerve responds to these events in your throat and mouth by sending a pain signal to the front of your brain. This reduces their ability to supply your brain with necessary oxygen in the blood. Many also agree this causes the tiny blood vessels in these areas to shrink, allowing less blood to pass through them. Most agree that eating or drinking something cold, too quickly, rapidly lowers the temperature at the back of your throat and roof of your mouth. But they don’t quite agree on which is more responsible for causing the pain. Scientists believe the blood vessels in the throat and mouth and the trigeminal nerve are central to what makes a brain freeze hurt. This nerve makes it possible for you to feel sensations in your face, including pain. Tangled up in this network of vessels are tiny nerve endings connected to one another and the brain through the trigeminal nerve. Blood contains many nutrients like oxygen, which is essential for your brain to function.
BRAIN FREEZE SKIN
Just beneath the skin on your face is a network of blood vessels that supply the face and brain with blood. There’s a lot we know about how a brain freeze works. Many studies report that less than half of their participants get them.
Ouch! AP Photo/Daniel Maurerīrain freeze isn’t as common as you might expect.
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