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Do you think only cats and dogs are running? Think again: Your too

We sometimes make a hint of hand. As if for straight sounds that are difficult to hear towards our ears. Researchers today teach us that the muscles they thought they were useless can still play their role in our hearing. And, as they do with our friends’ dogs, force us to pull our ears!

Observe your dog or cat and you will see. In his ears, there are muscles that allow it to be transmitted. Listening to environmental noise more carefully, in their direction. Our ancestors PrimitePrimite It was too. During the evolution, they helped our ears pavilion channel our ears. But it has already been millions of years that we, humans have stopped using these muscles. There are only vastages left in our ears. And rare are the ones who can still use them today to move their ears.

However, scientists had the same idea until the study was published in the journal Frontiers in neuro science. The work had already suggested that the largest muscles in our ears, back and high -level muscle, react while listening to cautious listening. They draw their ears up and back. Researchers at the University of Sarland (Germany) today show how they have shown that these muscles are still working in our ears when we mobilize our attention to capture the sounds.

In our ears, muscles that react to sounds

They equipped 20 peopleElectrodeElectrode Applies to their ear muscles. Then, they forced them to listen to an audio book and podcast at the same time, sometimes from the front, from the front. In an easy -to -understand mode, the podcast was less broadcast than the audio book and the speaker’s voices were very different. Two more complex methods include high podcast sounds and less different sounds. It is up to the volunteers to estimate the level of listening that the hearing asked them – there is not really a system that makes it possible to measure – and report the number of history thread. They were also questioned about the content of the book to confirm their comments.

The rest of the electrical signals recorded by the electrodes were revealed. Researchers noted that out of the three major muscles that connect the ear to the ear and the scalp to the ear and are important for it StimulationStimulation The reactions to the sound management in the ear, the later and the muscle are reacted to the sound management. High auricular muscles react to work problems.

Understand the movement of the Orular muscle

When listening problems are much higher than the average, they do not activate too much. On the other hand, when it is really difficult to detect sounds, they become very dynamic. And thus this trend can create an objective step in the future, whose researchers still lack.

However, the team has stressed that it is not certain that it really helps to hear muscle activity. The indicators created by the movement of the mines that they have recorded are really small. And it is unlikely that they may benefit worth noting. He said that it has been 25 million years to reduce these muscles in a vegetable state. They do what they can to help us better. But it is almost certain that they will not be able to get there.The principal author of this study explains the Andreas Shreer.

Like cats, humans shake ears to hear better

All of them should still be confirmed by additional work. For example, on many participants, more diverse and more realistic situations. “Now we are going to study the potential effects of muscle tension or the smaller movements of the ear on sound delivery.”Announced the sharer. Including people with disabilities at hearing. With a day with a day, some solutions that will help hearing and helps people better understand the sounds.

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