Brain weights in septuagenarians.


The brains of 90 septuagenarians were weighed and examined at autopsy. The heaviest weighed 2110 g and the lightest 907 g. They were classified by sex and by pathologic changes. Many of the brains were lighter than the accepted normal, the majority being between 1100 and 1199 g. This result is compared with the findings among the brains of 102 octogenarians and 29 nonagenarians previously reported.


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