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Rate My Professor Suzana Herculano-Houzel

Vanderbilt University

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5.04/23/2026

Makes learning feel rewarding and fun.

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About Suzana

Suzana Herculano-Houzel is an Associate Professor of Psychology at Vanderbilt University, with joint appointments in Biological Sciences and as Associate Director for Communications, Vanderbilt Brain Institute. In Psychology, her research centers on comparative neuroanatomy, exploring the cellular composition, morphology, evolution, metabolic costs, sleep needs across species, and feeding times of brains, and how these factors interrelate. She pioneered the isotropic fractionator method, enabling precise quantification of neurons and non-neuronal cells, which revealed that the human brain contains approximately 86 billion neurons, with 16 billion in the cerebral cortex, overturning prior estimates. Her studies have quantified neuronal scaling rules in rodents, primates, birds, carnivorans, and even theropod dinosaurs, showing primate-like telencephalic neuron numbers in T. rex and exceptional neuron densities in avian forebrains comparable to primates.