Testosterone can make a female canary singing
Testosterone can make a female canary singing, Tessa Hartog Dutch researchers discovered how to make a female canary sing using testosterone and BDNF protein, that usually female canaries do not sing but with some "suit" female canary brain structure can be modified in a way that could make they sing the song even attractive.
The influence of hormones in the brain walnuts and learning and memory of walnuts is a very complex thing to be addressed and the only suitable model for analysis of the process is the singing voice, so hatrog which was analyzed substances that play a role in the behavior of the female canary singing and how these substances can change brain anatomy.
The most interesting is the effect of testosterone has two truly independent, it can stimulate the production and fusion of new neurons in the brain tissue in birds and produce dilation of blood vessels and changes in the structure and anatomy of the brain associated with singing. The first effect depends on BDNF protein but the latter effect appears to be independent of BDNF.
With the results of these studies Hartog has shown that changes in the nerve cells not only produce physical changes, but also changes in behavior, including its effect on female birds.
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