Most people after eating cold food, for example ice cream, there are short-piercing pain in his temples. Until this time, scientists are unable to explain the reason of such phenomenon.
Specialists in the course of the earlier studies it was found that this phenomenon is mainly observed many times more often in people who are prone to migraines. Based on this information, scientists from Harvard University, an assumption was made that the plane of the pain could be built on a common cause and mechanisms. To explore the headaches, and they had used the phenomenon known as "brain freeze".
Headaches are extremely difficult to study, and this is due to the fact that there is no possibility with the accuracy of its episodes to follow from beginning to end. Drugs that cause migraleve pain, for research purposes to use simply denied because they have many undesirable side effects. But the attacks of headaches caused by very cold food in the laboratory to initiate quite simple. Another positive aspect of this method is the transience of pain, what makes it to the analysis of headaches simply the ideal model.
In experiment took part 13 volunteers. The researchers asked them through a straw to drink water with ice to fall on the soft palate of the mouth, and for the manifestation and disappearance of pain in the temporal part of the head to lift her arms up.
Monitoring of cerebral circulation participants using ultrasound gave the indication that the manifestation of pain is directly related to the increase of blood flow in the anterior cerebral artery, which is located just behind the eye apples, which becomes a cause of increasing the size of the cerebral artery. The pain in his temples disappears only after compensatory reductions in vessel walls.
Scientists believe that the extension followed by a rapid reduction of the cerebral arteries is a kind of adaptation of brain protection. The human brain is very sensitive to jumps of temperature, and therefore the threat of hypothermia causes expansion of blood vessels, thereby providing additional flow to the brain warm blood. This factor, in turn, leads to increased blood pressure and causing short-term pain.