Developmental plasticity in neural circuits controlling birdsong: Sexual differentiation and the neural basis of learning
Article first published online: 11 OCT 2004
Copyright © 1992 John Wiley & Sons, Inc.
Journal of Neurobiology
Volume 23, Issue 10, pages 1506–1528, December 1992
How to Cite
Arnold, A. P. (1992), Developmental plasticity in neural circuits controlling birdsong: Sexual differentiation and the neural basis of learning. J. Neurobiol., 23: 1506–1528. doi: 10.1002/neu.480231010
- Issue published online: 11 OCT 2004
- Article first published online: 11 OCT 2004
- Manuscript Received: 12 AUG 1991
- Manuscript Accepted: 12 AUG 1991
- zebra finch;
In many species of passerine songbirds, males learn their song during defined periods of life. Female song in often reduced or absent, as are the brain regions controlling song. Sexual differences in the brain arise because of the action of sex steroids, which trigger the formation of some neural pathways (especially the pathway from the higher vocal center to the robust nucleus) and prevent the atrophy of others in males. These neural changes occur during periods of developmental song learning and can recur during periods of learning in adult birds. The process of learning is correlated with major increases or decreases in the number of neurons in specific neuronal populations, suggesting that the formation or loss of specific neural pathways regulates the ability to learn. Species differences in sexual differentiation and learning allow informative cross-species comparisons of neural structure and behavior. © 1992 John Wiley & Sons, Inc.