Birds have primate-like numbers of neurons in the forebrain

S Olkowicz, M Kocourek, RK Lučan… - Proceedings of the …, 2016 - National Acad Sciences
Some birds achieve primate-like levels of cognition, even though their brains tend to be
much smaller in absolute size. This poses a fundamental problem in comparative and …

Equal numbers of neuronal and nonneuronal cells make the human brain an isometrically scaled‐up primate brain

FAC Azevedo, LRB Carvalho… - Journal of …, 2009 - Wiley Online Library
The human brain is often considered to be the most cognitively capable among mammalian
brains and to be much larger than expected for a mammal of our body size. Although the …

High associative neuron numbers could drive cognitive performance in corvid species

F Ströckens, K Neves, S Kirchem… - Journal of …, 2022 - Wiley Online Library
Corvids possess cognitive skills, matching those of nonhuman primates. However, how
these species with their small brains achieve such feats remains elusive. Recent studies …

The evolution of brain neuron numbers in amniotes

K Kverková, L Marhounová… - Proceedings of the …, 2022 - National Acad Sciences
Reconstructing the evolution of brain information-processing capacity is paramount for
understanding the rise of complex cognition. Comparative studies of brain evolution typically …

[HTML][HTML] The elephant brain in numbers

S Herculano-Houzel, K Avelino-de-Souza… - Frontiers in …, 2014 - frontiersin.org
What explains the superior cognitive abilities of the human brain compared to other, larger
brains? Here we investigate the possibility that the human brain has a larger number of …

Artificial selection on brain size leads to matching changes in overall number of neurons

L Marhounová, A Kotrschal, K Kverková, N Kolm… - …, 2019 - academic.oup.com
Neurons are the basic computational units of the brain, but brain size is the predominant
surrogate measure of brain functional capacity in comparative and cognitive neuroscience …

Interspecific allometry of the brain and brain regions in parrots (Psittaciformes): comparisons with other birds and primates

AN Iwaniuk, KM Dean, JE Nelson - Brain, Behavior and Evolution, 2004 - karger.com
Despite significant progress in understanding the evolution of the mammalian brain,
relatively little is known of the patterns of evolutionary change in the avian brain. In …

[HTML][HTML] The human brain in numbers: a linearly scaled-up primate brain

S Herculano-Houzel - Frontiers in human neuroscience, 2009 - frontiersin.org
The human brain has often been viewed as outstanding among mammalian brains: the most
cognitively able, the largest-than-expected from body size, endowed with an overdeveloped …

Neuron numbers link innovativeness with both absolute and relative brain size in birds

D Sol, S Olkowicz, F Sayol, M Kocourek… - Nature Ecology & …, 2022 - nature.com
A longstanding issue in biology is whether the intelligence of animals can be predicted by
absolute or relative brain size. However, progress has been hampered by an insufficient …

[HTML][HTML] Dogs have the most neurons, though not the largest brain: trade-off between body mass and number of neurons in the cerebral cortex of large carnivoran …

D Jardim-Messeder, K Lambert, S Noctor… - Frontiers in …, 2017 - frontiersin.org
Carnivorans are a diverse group of mammals that includes carnivorous, omnivorous and
herbivorous, domesticated and wild species, with a large range of brain sizes. Carnivory is …