Neuron numbers link innovativeness with both absolute and relative brain size
Sol, Daniel (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Olkowicz, Seweryn (Charles University)
Sayol, Ferran (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Kocourek, Martin (Charles University)
Zhang, Yicheng (Charles University)
Marhounová, Lucie (Charles University)
Osadnik, Christin (University of Duisburg-Essen)
Corssmit, Eva (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Garcia-Porta, Joan (Universitat de Barcelona. Departament de Genètica, Microbiologia i Estadística)
Martin, Thomas E. (University of Montana)
Lefebvre, Louis (McGill University)
Němec, Pavel (Charles University)

Fecha:	2022
Resumen:	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 understanding of how neuron numbers shape internal brain organization and cognitive performance. On the basis of estimations of neuron numbers for 111 bird species, we show here that the number of neurons in the pallial telencephalon is positively associated with a major expression of intelligence: innovation propensity. The number of pallial neurons, in turn, is greater in brains that are larger in both absolute and relative terms and positively covaries with longer post-hatching development periods. Thus, our analyses show that neuron numbers link cognitive performance to both absolute and relative brain size through developmental adjustments. These findings help unify neuro-anatomical measures at multiple levels, reconciling contradictory views over the biological significance of brain expansion. The results also highlight the value of a life history perspective to advance our understanding of the evolutionary bases of the connections between brain and cognition.
Ayudas:	Agencia Estatal de Investigación PID2020-119514GB-I00 European Commission 838998
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Publicado en:	Nature ecology & evolution, Vol. 6 (July 2022) , p. 1381-1389, ISSN 2397-334X

DOI: 10.1038/s41559-022-01815-x

Postprint 25 p, 927.1 KB

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Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
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