Your yawning is important to your brain, apparently the longer you yawn the better. Scientist found that if a species is yawning a lot it means that they have a more developed brain. This also means those who don’t yawn as much have a smaller brain. Although it may sound like a lie, researchers found a link between these two.
The research was made on several species, 19 to be exact, so not only humans have these two connected, several animals have them too. The scientists surveyed 109 individuals and their yawns. Some of the species they tested, save from humans, were capuchin monkeys, mice, rabbits, and African elephants. They discovered that no matter the species, the yawning predicts the brain weight and the cortical neurons number.
Other researches were made on this topic. For instance, in 2007 another study showed how the brain is affected by the yawn. The fact that we open our jaws and let a lot of air go to our brain it makes it breathe better and it can also get it off the default mode. This default mode is when the brain is tired and it makes just the necessary job to survive, without any difficult activities.
Another research, this one made in 2014, showed the same thing, that the brain is awakened from the default mode once the cerebrospinal fluid circulates better. This happens also when we yawn.
Yawn duration should correlate with brain size and complexity since having a larger and more neuron-dense brain might require more blood flow,” said the leader of the study, Andrew Gallup.
The researchers tested the idea by watching several videos of animals and humans yawning and counting the seconds. The shortest yawn is that of mice and the longest, of course, is the yawn of human. Other animals that had long yawning moments where camels and dogs
This showed that every species, whose brain size is known by scientists, has a different time of yawning. The longer they yawn, the bigger their brain. The scientist also mentioned that there is no relation between the size of the jaws because bigger animals, like elephants have bigger jaws that humans and still have shorter yawns.
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