对阅读不能症的研究为认知机理提供了某些线索。本文介绍这方面的一些研究情况。用书写形式表达语言的能力是人类得天独厚的技艺。虽然书写和讲话互有关联,但两者间存在重大的差异。口头语言对所有人类社会都是共同的,它可能是人类进化的光辉产物。作为基本生物学现象的口语受脑内高度限定的中枢所控制。相形之下, The study of dyslexia provides some clues to cognitive mechanisms. This article describes some of the research in this area. The ability to express language in written form is a blessing of mankind. Although writing and speaking are interrelated, there are significant differences between the two. Oral languages ​​are common to all human societies and may be the glorious product of human evolution. Oral English as a basic biological phenomenon is controlled by a highly defined center in the brain. In contrast,