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Can’t we hear our footsteps?

Asked by: Donald Moore 206 views Software October 31, 2018

Can't we hear our footsteps?

7 Answers

  1. +7Votes  

    You are walking through an empty street, and suddenly you hear footsteps coming. You will think, it seems that someone is following you. Because although the street is very quiet, your own footsteps will never attract your attention, only the footsteps of strangers will make you alert. So why can’t we hear our footsteps?

    Scientists have long known that we can ignore the sounds we make, but only Focus on studying the brain’s performance in the dark. The new study, published in the journal Nature, aims to deepen our understanding of this phenomenon through footsteps.

    The main researcher, Dr. David Schneider, is a teaching assistant from the Neuroscience Center at New York University. He said: “We want to understand the single cells in the brain, the nerves. Yuan, how to cooperate to accomplish this phenomenon. In order to do this, we studied the brain of the mouse. At the same time, we built an augmented reality system to control the sound that the mouse heard while running. We were able to walk on them for several days in a row. Only one sound is played, and then replaced with another sound if they are unprepared.”

    The study was conducted at Duke University School of Medicine. . Scientists soon discovered that when mice expected them to hear a certain sound while walking, the neurons in the brain’s auditory cortex no longer respond to the sound.

    Schneider explains: “It’s like they wear a special earphone that filters the sounds that accompany their movements. By contrast, when we play them When there is another unexpected sound, the neurons in the auditory cortex will react strongly.”

    Scientists realized that when mice became familiar with them After the music accompanying the walk, the important connection between the auditory cortex and the motor cortex changes, which is one of the brain’s reactions to movement.

    Schneider said: “When the mouse hears the footsteps, this connection suppresses the originally excited neurons in the auditory cortex. The result is whenever the mouse When you walk, there will be a group of inhibitory neurons excited, let the mouse ignore this sound.”

    Not just footsteps

    Of course this experience is not limited to footsteps. Schneider added: “People who breathe heavily seldom know that they breathe heavily because they are not noisy for them! I think it is the same for people who are typing on keyboards. Of course I can type when I type. I heard the sound of typing, but this sound will not bother me. But if someone sitting next to me knocks on the keyboard too loud, then I will feel very annoyed.”

    For any creature that is used to being preyed, such as a mouse, this ability to filter its own innocuous noise and focus on more dangerous sounds is critical. The same principle applies when we sing, talk or play music.

    Schneider said: “Our minds usually have their own voices. When I sit in front of the piano, I press the keys. I know what kind of voice I want to make, and when we practice, we usually practice mistakes. This ability to ignore the consequences of our own actions also gives us unparalleled ability to test. When I play the right tone I can hear it, but my auditory cortex will remain silent. When I play the wrong sound, I will get a stronger reaction.”

    As a result, the brain will interfere with this reaction, such as: “Hey, this sound is wrong, maybe the way I move my finger next time should change.”

    Schneider said: “This allows us to learn more from our own mistakes.” He pointed out that they are still trying to understand how the brain uses these false signals when we are learning languages ​​and instruments.

    Researchers hope to use this information to provide research ideas for different fields. Patients with diseases such as schizophrenia use a similar brain circuit in ignoring and detecting sound.

    Schneider said: “Psychiatric patients usually hear non-existent sounds. This may be because their brain movements and hearing center connections have changed. We think that their brain circuit may involve this kind of research. So we want to study mice with similar genetic mutations in human schizophrenia.”

    Lisa James- October 31, 2018 |

  2. +3Votes  

    Is there a problem with hearing? It is recommended to go to the ENT or hearing aid store to check your hearing.

    Stephen- October 31, 2018 |

  3. +3Votes  

    Yes. It’s just that you are walking too light.

    Gregory Hill- October 31, 2018 |

  4. +3Votes  

    When you walk, you can hear it when you walk a little.

    Michael Clarke- October 31, 2018 |

  5. +3Votes  

    Of course you can hear

    Ryan Cook- October 31, 2018 |

  6. +4Votes  

    How can you not hear it?

    Linda Walker- October 31, 2018 |

  7. +8Votes  

    You don’t know your footsteps, I can hear my footsteps

    Jose Morgan- October 31, 2018 |