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脑皮质基底核退化症:关于大脑意识产生的疾病

地质工程学家RFS在2010年10月开始出现头疼、健忘、颤抖和行走困难的症状,随后他被确诊为患有脑皮质基底核退化症——一种能杀死脑细胞的疾病。在接下来的日子里,数字对RFS日益陌生,他不能再认出大部分数字,但仍能进行心算和其它数学运算。他掌握了一套新的系统,如l代表2,⌈ 代表8。

RFS, an engineering geologist in his late 60s, began to experience headaches, amnesia, tremors, and difficulty walking in October 2010. Doctors couldn’t determine the cause—they suspected a stroke, then discovered that he had a disease called corticobasal syndrome, which kills off brain cells. In the following days numbers became increasingly unfamiliar to RFS. He could no longer recognize most of the numbers, but could still perform mental and other mathematical operations. He mastered a new system of them, where l stands for 2 and ⌈ stands for 8.

一组神经学家对RFS进行了观察和研究,发现他的问题与视觉障碍无关,而与大脑对数字的解释有关:一旦他无意识的大脑回路记录了一个数字,一切就会变得混乱。科学家认为他的缺陷可能有助于揭示意识是如何产生的。

The tests performed by a group of neuroscientists revealed that RFS’s deficit is not a simple visual malfunction.Rather, the deficit depended on his interpretation: As soon as his unconscious brain circuits registered a number, everything went haywire. His amazingly specific deficit could help neuroscientists understand how conscious awareness arises in the brain.

简报作者:STARSET Mirror

参考文章:

  1. The mysterious case of man who can read letters—but not numbers—exposes roots of consciousness. Sam Kean. 2020/07/29. sciencemag.org
  2. Lack of awareness despite complex visual processing: Evidence from event-related potentials in a case of selective metamorphopsia

第一信源:Solidot

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