The interaction of information and matter: a case study about the coevolution of human language and brain

Is there any interaction between information and matter? Coevolution of human language and brain as a case of interaction between information and matter is studied．First, evidence for possible coevolution of human language and brain as revealed by previous works is discussed．These include language-related areas in human cerebral cortex, evolution of human language and brain, genetic basis of evolution of language. A dynamic model is developed to examine mutual enhancement of human language and brain．Developmental level of language can be promoted by advances in brain function due to language-related gene mutations．Whether such mutations are positively selected can be influenced by developmental levels of language．Only mutations satisfying preliminary conditions are positively selected．Coevolution of human language and brain is a special case of interaction between information and matter．