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How many neurons does a normal person have? 

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We interpret our findings as evidence of a larger than normal population of neurons tuned to this frequency region.
The remaining neurons appear to be functionally normal.
Some neurons may have been preganglionic parasympathetic neurons.
It is suggested that grafted CNS neurons may possess normal physiological properties.
These findings suggest that new neurons are produced throughout adult life in the striatum of normal, adult primates.
In addition, the differentiated neurons observed in the later aggregates appear to produce normal processes.
Interestingly, many of the supernumerary axons had very small cross-sectional areas, suggesting that the associated neurons are not normal.
Together, these findings portray a striking dependency of parasympathetic neurons on sympathetic nerves to maintain normal phenotype and function.