Human neoteny revisited: The case of synaptic plasticity
Version of Record online: 29 SEP 2011
Copyright © 2011 Wiley-Liss, Inc.
American Journal of Human Biology
Volume 23, Issue 6, pages 729–739, November/December 2011
How to Cite
Bufill, E., Agustí, J. and Blesa, R. (2011), Human neoteny revisited: The case of synaptic plasticity. Am. J. Hum. Biol., 23: 729–739. doi: 10.1002/ajhb.21225
- Issue online: 10 OCT 2011
- Version of Record online: 29 SEP 2011
- Manuscript Accepted: 6 SEP 2011
- Manuscript Revised: 29 AUG 2011
- Manuscript Received: 14 JAN 2011
The process of learning requires morphological changes in the neuronal connections and the formation of new synapses. Due to the importance of memory and learning in our species, it has been suggested that the synaptic plasticity in a number of association areas is higher in the human brain than in other primates. Cortical neurons in mammals are characterized by higher metabolism, activity, and synaptic plasticity during development and the juvenile stage than in the adult. In Homo sapiens, brain development is retarded compared with other primates, especially in some association areas. These areas are characterized by the presence of neurons, which remain structurally immature throughout their lifespans and show an increase in the expression of the genes, which deal with metabolism and the activity and synaptic plasticity in adulthood. The retention of juvenile features in some adult neurons in our species has occurred in areas, which are related to episodic memory, planning, and social navigation. The increase of the aerobic metabolism in these neurons may lead, however, to higher levels of oxidative stress, therefore, favoring the development of neurodegenerative diseases which are exclusive, or almost exclusive, to humans, such as Alzheimer's disease. Am. J. Hum. Biol. 2011. © 2011 Wiley-Liss, Inc.