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唱歌沒調(diào)?不是你的錯(cuò)
No karaoke for you! Bad wiring spells tone-deaf

[ 2009-08-19 13:34]     字號(hào) [] [] []  
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唱歌找不著調(diào)的人注意了!最近有一項(xiàng)研究結(jié)果顯示,對(duì)音樂曲調(diào)毫無感覺的“音盲”人士對(duì)音樂曲調(diào)沒有感覺是因?yàn)樗麄兊哪承┠X神經(jīng)元傳輸不暢。一般來說,患“音盲”的人無法辨別音樂曲調(diào)的差異,而且有很強(qiáng)的遺傳性。在這項(xiàng)研究中,研究人員通過對(duì)“音盲”和非“音盲”兩組被試者的大腦掃描發(fā)現(xiàn),患“音盲”的被試者大腦中接收和制造聲音的兩個(gè)區(qū)域連接以及其中的神經(jīng)元傳輸都比非“音盲”的被試者要少,有時(shí)甚至掃描不到有神經(jīng)元在傳輸。如果把這兩個(gè)區(qū)域比作兩個(gè)小島,而把它們之間的神經(jīng)元傳輸通道比作公路的話,那么,患“音盲”的人大腦中這條“公路”上的車流要顯得稀疏很多。研究人員表示,這一發(fā)現(xiàn)可能會(huì)對(duì)治療其他類型的語言障礙有所幫助。

唱歌沒調(diào)?不是你的錯(cuò)

唱歌沒調(diào)?不是你的錯(cuò)

If you're one of the unlucky people who is tone-deaf, it turns out your brain may have a wiring problem. That's what new research published Wednesday suggests.

Do your friends cover their ears when you sing along with the radio? Does the choir director ask you to lip-sync?

If you're one of the unlucky people who is tone-deaf, it turns out your brain may have a wiring problem. That's what new research published Wednesday suggests.

People who are tone-deaf can't detect differences in musical pitch but usually have normal hearing and speech. Tone-deafness runs in families, and estimates of how many people have the problem range from 4 percent to 17 percent.

In the small study done in Boston, brain scans showed there was a difference in a particular brain circuit between those who were tone-deaf and those who weren't. Among the tone-deaf, researchers discovered there were fewer connections between two areas of the brain that perceive and produce sounds.

The study's lead author, Psyche Loui, likened the connection to a highway between two islands in the brain.

In tone-deaf people, "there's less traffic on the highway," said Loui, who studies music and the brain at Harvard Medical School and is also a musician.

Loui and her colleagues took brain scans of 20 people, half of them tone-deaf. Those who were tone-deaf had fewer nerve fibers between the frontal and temporal regions of the brain, or in some cases the fibers couldn't be detected at all.

The researchers reported their findings in Wednesday's issue of the Journal of Neuroscience.

"It's a new piece in our understanding of tone-deafness and the processes that are involved in the perception of pitch in general," said Nina Kraus of Northwestern University, who wasn't involved in the research.

Loui said the brain connection they examined was long known to be involved in language. "Now that we know which brain pathways to train," she said, there may be ways to help people with tone-deafness, and perhaps those with other language disorders.

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(Agencies)

唱歌沒調(diào)?不是你的錯(cuò)

Vocabulary:

lip-sync: 對(duì)口型,假唱

tone-deaf: 音盲,無法分辨音律

(英語點(diǎn)津 Helen 編輯)

 
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