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Science 17 June 1983:
Vol. 220. no. 4603, pp. 1302 - 1304
DOI: 10.1126/science.6407108
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Articles

Science, Vol 220, Issue 4603, 1302-1304
Copyright © 1983 by American Association for the Advancement of Science

articles

Relative brain size and metabolism in mammals

E Armstrong

Comparisons of the relation between brain and body weights among extant mammals show that brain sizes have not increased as much as body sizes. Interspecific increases in brain and body size appear to occur at the same rate, however, when the amount of available energy is taken into account. After this adjustment, brains of primates are slightly larger than expected from the overall mammalian data, but primates also use a larger proportion of their total energy reserves for their brains. Analyses of relative brain size must take into account the requirements that the metabolically active brain has for the body.


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