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  • Many of you can probably relate to being annoyed at the sound of someone tapping their foot

  • incessantly, breathing really loudly, or clicking pens.

  • But for some people it's more than an annoyance, certain sounds cause serious distress.

  • This was the case for three patients who were referred to the Academic Medical Center in

  • Amsterdam in 2009 for what their doctors thought could be obsessive compulsive disorder.

  • But after interviews and assessments, the specialists at the medical center realized

  • that the symptoms they were presenting like extreme anger at certain sounds and impulsively

  • trying to stop them,were not diagnosable.

  • They did not fit any of the criteria in either the DSM or the International Statistical Classification of Diseases handbooks.

  • As you probably know, these are like bibles for the medical community - if something is

  • not listed there, medically speaking, it's like it doesn't exist.

  • But clearly, based on these three patients, something was going on.

  • So researchers at the Academic Medical Center (AMC) decided to take a deeper dive into what

  • seemed to them, like a potentially new sound disorder.

  • Now, back in 2001 two researchers at Emory coined the term misophonia, which means 'hatred of sound.”

  • They noted abnormally strong physical and psychological reactions to sound that were completely involuntary.

  • And theorized that these may be stemming from enhanced connections between the brain and auditory system.

  • So, the idea was already out there, but more research was needed.

  • So the researchers at the AMC set out to determine if it could be classified as an actual disorder.

  • For their study, the researchers recruited 42 Dutch participants who reported having sound aversions.

  • They then conducted multiple interviews and assessments, including using a modified version

  • of the Yale-Brown Obsessive-Compulsive Scale, which they called the Amsterdam Misophonia Scale.

  • This asked participants to rate things like how much time they spent thinking about or acting on their misophonia,

  • how sound affected their social lives, how much anger they felt when they heard certain sounds,

  • and how much they struggled with controlling impulses to stop sounds.

  • In 2013 they published their results in the peer reviewed journal PLOS One.

  • They found that all participants were bothered by sounds produced by humans, not animals, or cars or anything else.

  • And for the vast majority of participants, 81%, sounds that had to do with eating were terrible.

  • About 60% mentioned being stressed out by clicking or typing.

  • What's more, five patients were also triggered by repetitive movement - such as rocking feet back and forth.

  • Many of you, myself included, can probably relate and find some of these things super annoying.

  • But unlike most of us, these patients weren't just annoyed.

  • They were deeply upset - they immediately experienced a physical aversive reaction like

  • irritation and disgust that turned into anger.

  • In fact, more than a quarter of patients reported occasionally getting aggresive and more than

  • 10% even admitted to hitting an ex partner once.

  • For people with misophonia, certain sound cause so much daily suffering that they attempt to avoid them at all costs.

  • The problem is that these sounds are everywhere, so they end up isolating themselves.

  • And, this negatively affects their work, school, and social activities - preventing them from leading normal lives.

  • This is why some medical professionals, like the researchers in this study, are advocating

  • to classify the most extreme cases of these annoyances as a discrete psychiatric condition.

  • Classifying it would facilitate treatment and research.

  • Which is important, because research is currently scarce.

  • Scientists think it is caused by something in the central nervous system - that it has

  • to do with perception in the brain and not actual problems with the ears.

  • But without additional funding and research it's tough to know for sure... and consequently,

  • tough to help those who may be suffering.

Many of you can probably relate to being annoyed at the sound of someone tapping their foot

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噛む音はなぜ私たちを狂わせるのか? (Why Does The Sound Of Chewing Drive Us Nuts?)

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    Boyeee に公開 2021 年 01 月 14 日
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