People have lost their ability to change their ears, but these vestigijial muscles are still twisting

Ten millions of years ago, our fathers can capture their ears to take sounds like cats and dogs today. People have lost this ability over time and once managed the ear movement now, but mostly useless – but still from a few people who can walk their eyes. However, new research shows that these muscles show that these muscles still react while listening to the primal function.

When researchers in Germany and the United States once used to move our ears known as auricular muscles, they focused on the opponent’s voices, they activated the ears of my fathers or actively trying to revive our ears. Although this is improving our hearing today, they show that we are trying to listen to their research, their research, and those muscles. An excited findings also lightened the light in a while in a period of suddenly a useful ability to lose our body and evolution.

“There are three major muscles that connect Aurika to the skull and scalp,” said the magazine, Andreas Schröer, Saarland University, said in the statement of the magazine Boundaries. “These muscles, especially superior auricuals, effortlessly operated during listening. It is not just like a reflex, especially in a difficult hearing environment, especially in a difficult hearing environment, is not potentially engaged in potentially.”

Previous studies already operated in the posterior and superior auricular muscles (in the greatest auricular muscles), posterior and superior auricular muscles that offer the ears and funnel sounds of the hollows. Schröer and colleagues, but people wanted to determine if the muscles were more active when they were forced to listen harder.

As a learn Published today BoundariesResearchers closed electric impulses – 20 participants, the electric muscles, which discovered the electrodes without hearing hearing problems, and instructed to listen to an audiobook from the speakers. Participants listened to the audiobook on various levels of difficulty and took the quiz about the content in the end. Sometimes researchers played a podcasting at the same time and sometimes sounds came from different directions, but in the opinion of researchers, the task was always possible. If the participant refuses to be very difficult, the suspension of an auto-associated activity has been suspended.

As a result, researchers observed that the posterior and superior auricular muscles operate differently depending on the acoustic situation. To hear the audiobook, the participants made more efforts, the superior auricular muscles were more contracts. In addition, when Audobook plays after the participant, the posterior auricular muscles of the participants were activated in a way that could show their ears in this direction.

“It was Vestigial, because our ancestors explained this capacity 25 million years ago,” Scray “.” As a possible explanation, our visual and vocal systems can be a pressure of evolution to move the ears. “

As a result, the superior auricular muscles appear to react to the more activation of the audition during the hardest listening tasks, the posterior auricular muscles trigger the voice direction.

“Ear movements that can be created by the signals we have said,” said Schröer, probably no useless, “Schröer said. “However, Aurika (Earbirds) helps us to localize the sounds. Thus, our aurikulomotor system is likely to be the best after becoming vestigial for 25 million years, but does not get much.”

What are the practical applications of almost useless ear muscles? Although researchers accept the results of more investigations in more real conditions, the researchers must approve their results, which can serve as a physical indicator of the advantage of the superior auric muscle activity.

So the next time someone requires, You listen? Follow – they can soon have tools to check your answer.