Brain freeze: Why ice cream makes some scream

#BrainFreeze,#Popsicle #Slush #IceCream

Most people have likely experienced brain freeze — the debilitating, instantaneous pain in the temples after eating something frozen — but researchers didn't really understand what causes it, until now.

Previous studies have found that migraine sufferers are actually more likely to get brain freeze than people who don't get migraines. Because of this, the researchers thought the two might share some kind of common mechanism or cause, so they decided to use brain freeze to study migraines.

Headaches like migraines are difficult to study because they are unpredictable. Researchers aren't able to monitor a whole one from start to finish in the lab. They can give drugs to induce migraines, but those can also have side effects that interfere with the results. Brain freeze can quickly and easily be used to start a headache in the lab, and it also ends quickly, which makes monitoring the entire event easy.

The researchers brought on brain freeze in the lab by having 13 healthy volunteers sip ice water through a straw right up against the roof of their mouth. The volunteers raised their hands when they felt the familiar brain freeze come on, and raised them again once it disappeared.

The researchers monitored the blood flow through their brains using an ultrasound-like process on the skull. They saw that increased blood flow to the brain through a blood vessel called the anterior cerebral artery, which is located in the middle of the brain behind the eyes. This increase in flow and resulting increase in size in this artery brought on the pain associated with brain freeze.

When the artery constricts, reining in the response to this increased flow, the pain disappears. The dilation, then quick constriction, of this blood vessel may be a type of self-defense for the brain, the researchers suggested. "The brain is one of the relatively important organs in the body, and it needs to be working all the time," study researcher Jorge Serrador, of Harvard Medical School, said in a statement. "It's fairly sensitive to temperature, so vasodilation [the widening of the blood vessels ] might be moving warm blood inside tissue to make sure the brain stays warm."

This influx of blood can't be cleared as quickly as it is coming in during the brain freeze, so it could raise the pressure inside the skull and induce pain that way. As the pressure and temperature in the brain rise, the blood vessel constricts, reducing pressure in the brain before it reaches dangerous levels.

If other headaches work in the same way, drugs that stop these blood vessels from opening up, or that could make this blood vessel constrict could help treat them, the researchers say.

By Jennifer Walsh - MSMBC LiveScience

Comments

9 things about MLK's speech and the March on Washington

#MLK #MartinLutherKingJr #MarchonWashington #IHaveaDream "I have a dream this afternoon that my four little children will not come up in the same young days that I came up within, but they will be judged on the basis of the content of their character, not the color of their skin." The Rev. Martin Luther King Jr. spoke these words in 1963, but this was not the speech that would go down as one of the most important addresses in US history. King spoke these words in Detroit, two months before he addressed a crowd of nearly 250,000 with his resounding "I Have a Dream" speech at the March on Washington for Freedom and Jobs on August 28, 1963. Several of King's staff members actually tried to discourage him from using the same "I have a dream" refrain again. As we all know, that didn't happen. But how this pivotal speech was crafted is just one of several interesting facts about what is one of the most important moments in the 2...

A call for equality and freedom, it became one of the defining moments of the civil rights movement

#MLK #MartinLutherKingJr #IHaveaDream I Have a Dream, speech by Martin Luther King, Jr., that was delivered on August 28, 1963, during the March on Washington. A call for equality and freedom, it became one of the defining moments of the civil rights movement and one of the most iconic speeches in American history. Some 250,000 people gathered at the Lincoln Memorial in Washington, D.C., for the March on Washington. The one-day event both protested racial discrimination and encouraged the passage of civil rights legislation; at the time, the Civil Rights Act was being discussed in Congress. The march featured various speeches as well as musical performances before King, a celebrated orator, appeared as the final official speaker; A. Philip Randolph and Benjamin Mays ended the proceedings with a pledge and a benediction, respectively. Early in his prepared speech, King referenced Abraham Lincoln’s Gettysburg Address with “Five score years ago….” He then spoke a...

Remembering Martin Luther King Jr.

#MLK #Assassination #MartinLutherKingJr #Memorial National Civil Rights Museum The Lorraine Motel where James Earl Ray assassinated King on April 4, 1968, is a complex of museums that trace the civil rights movement in the U.S. from the 17th century to the present. #MLK #MartinLutherKingJr #Memorial https://www.civilrightsmuseum.org/

Are we really listening to what MLK had to say?

#MartinLutherKingJr #MLK #CivilRights #DrKing In 2020, the Martin Luther King Jr. holiday falls in a national election year, one that reminds us of the importance of voting rights, citizenship and political activism to the health of our democracy. King imagined America as a "beloved community" capable of defeating what he characterized as the triple threats of racism, militarism and materialism. The passage of the 1964 Civil Rights Act and the 1965 Voting Rights Act, alongside the 1954 Brown Supreme Court decision, represents the crown jewels of the civil rights movement's heroic period. Yet King quickly realized that policy transformations alone, including the right to vote, would be insufficient in realizing his goal of institutionalizing radical black citizenship toward the creation of the "beloved community." King argued that justice was what love looked like in public. 2020 also marks the 55th anniversary of the passage of the Voting...

Triple5Light Therapy

Search This Blog