||"To determine the cellular scaling rules for primate brains and
to examine how they compare to the scaling rules for rodents, [researchers] used the isotropic fractionator (14), a nonstereological method, to estimate the total numbers of neuronal and nonneuronal cells
in the cerebral cortex, cerebellum, and remaining structures of
the brain and to examine how they scale across six species of the
order Primata, from Callithrix to Macaca, and in the closely
related tree shrew (order Scandentia)."