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International Review of Cytology
There are currently about 21 million people over 6S years in the United States and over a million of them suffer from a severe degree of mental impairment. This number will undoubtedly increase as more and more people attain their full lifespan. The Veterans Administration is acutely aware of this problem in the population it serves. Currently, there are about 31 million veterans in the United States. About 13 percent of these veterans are over 6S years of age and the number is expected to increase to 40 percent by the turn of the century. In recognition of the pressing need to address this problem, eight Geriatric Research, Educational and Clinical Centers (GRECC) have been established unde...
Several model systems have been used to understand the cellular and molecular mechanisms of differentiation of mammalian nerve cells. Each model system has unique advantages and disadvantages and is suited for the study of only certain aspects of differentiation. In this book, the techniques of these models and the usefulness and limita tion of each model system are discussed. An awareness of the use and misuse of each model system is important for a rational interpretation of data and for a reasonable comparison of data obtained from different model systems. With the use of clonal lines of neuronal cells and hybrid neural cells (neural cells x nonneural cells), many new concepts have emerge...