단어 기억의 신경과학적 기제
The Neuroscientic Mechanism of Word Memory
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The aim of this thesis is to look out upon the representations of our knowledge about words. In particular we focus on how is our knowledge of words encoded and stored in the brain on the basis of neuroscientic surveys. The issues of word memory representation and the answers about those issues in neuroscience are as follows. First, what is the neural mechanism for word memories? It does not merely mean electro-chemical changes in synapses to form word memories. Instead, forming word memories are followed by changes in the level of neural cell such as gene expression and protein synthesis. The neurobiological mechanisms which explain these changes are synaptic plasticity, Hebb’s rule, long term protentiation and consolidation. Second, What are the parts of brain which is involved in word memory? The major parts of brain which involved in word memory are the cerebral cortex and hippocampal structure. Third, what is the process of encoding new words in the brain? New words are distributedly encoded in cerebral cortex. But before the new words are fixed in the cortex, hippocampal structure intermediate words in short-term memory and long-term memory. Fourth, where are the areas that the informations of word are represented, and how are the informations of word represented in the brain? The perceptual and motor-related informations of word are represented in sensory and motor areas of brain. The abstract informations of word are represented in the association areas which are the parts of sensory-motor areas. It is not uncertain whether there are specialised brain areas for taxonomic categories of words.
Abstract
The aim of this thesis is to look out upon the representations of our knowledge about words. In particular we focus on how is our knowledge of words encoded and stored in the brain on the basis of neuroscientic surveys. The issues of word memory representation and the answers about those issues in neuroscience are as follows. First, what is the neural mechanism for word memories? It does not merely mean electro-chemical changes in synapses to form word memories. Instead, forming word memories are followed by changes in the level of neural cell such as gene expression and protein synthesis. The neurobiological mechanisms which explain these changes are synaptic plasticity, Hebb’s rule, long term protentiation and consolidation. Second, What are the parts of brain which is involved in word memory? The major parts of brain which involved in word memory are the cerebral cortex and hippocampal structure. Third, what is the process of encoding new words in the brain? New words are distributedly encoded in cerebral cortex. But before the new words are fixed in the cortex, hippocampal structure intermediate words in short-term memory and long-term memory. Fourth, where are the areas that the informations of word are represented, and how are the informations of word represented in the brain? The perceptual and motor-related informations of word are represented in sensory and motor areas of brain. The abstract informations of word are represented in the association areas which are the parts of sensory-motor areas. It is not uncertain whether there are specialised brain areas for taxonomic categories of words.
참고문헌 (24)
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