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Gene Implicated In Human Language Affects Song Learning In Songbirds

Date:
December 5, 2007
Source:
Public Library of Science
Summary:
The FoxP2 gene, which is essential for human speech and language, is also required for proper song development in songbirds, raising the possibility that songbirds and humans share molecular pathways for learned vocalizations.

Zebra finch.
Credit: iStockphoto/David Gluzman

Do special "human" genes provide the biological substrate for uniquely human traits, like language?

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Genetic aberrations of the human FoxP2 gene impair speech production and comprehension, yet the relative contributions of FoxP2 to brain development and function are unknown.

Songbirds are a useful model to address this because, like human youngsters, they learn to vocalize by imitating the sounds of their elders.

Previously, Dr. Constance Sharff and colleagues found that, when young zebra finches learn to sing or when adult canaries change their song seasonally, FoxP2 is up-regulated in Area X, a brain region important for song learning.

Dr. Sebastian Haesler, Dr. Scharff, and colleagues experimentally reduce FoxP2 levels in Area X before zebra finches started to learn their song. They used a virus-mediated RNA interference for the first time in songbird brains.

The birds, with lowered levels of FoxP2, imitated their tutor's song imprecisely and sang more variably than controls.

FoxP2 thus appears to be critical for proper song development.

These results suggest that humans and birds may employ similar molecular substrates for vocal learning, which can now be further analyzed in an experimental animal system.

Journal citation: Haesler S, Rochefort C, Georgi B, Licznerski P, Osten P, et al. (2007) Incomplete and inaccurate vocal imitation after knockdown of FoxP2 in songbird basal ganglianucleus Area X. PLoS Biol 5(12): e321. doi:10.1371/journal.pbio.0050321


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The above story is based on materials provided by Public Library of Science. Note: Materials may be edited for content and length.


Cite This Page:

Public Library of Science. "Gene Implicated In Human Language Affects Song Learning In Songbirds." ScienceDaily. ScienceDaily, 5 December 2007. <www.sciencedaily.com/releases/2007/12/071204091933.htm>.
Public Library of Science. (2007, December 5). Gene Implicated In Human Language Affects Song Learning In Songbirds. ScienceDaily. Retrieved January 29, 2015 from www.sciencedaily.com/releases/2007/12/071204091933.htm
Public Library of Science. "Gene Implicated In Human Language Affects Song Learning In Songbirds." ScienceDaily. www.sciencedaily.com/releases/2007/12/071204091933.htm (accessed January 29, 2015).

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