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Unformatted text preview: Nissl stain – stains RNA blue (cell bodies!) Congregations of cell bodies show up = nuclei! Most obvious comparison to make – those between singing and non-singing birds (males and females). Clear differences in size of the song nuclei. More comparisons made between males of the same species with variable repertoire sizes – again clear differences in size of HVC and RA. Further work done examining many species with varying repertoire sizes. Sizes of all brain areas were positively correlated with repertoire size. So – the more songs a bird can sing, the larger its song nuclei. Song repertoire sizes range among individuals, groups, geographic areas, and of course species. Starting with the most extreme examples, there is mimicry and imitation: MOCKINGBIRD EXAMPLE LYREBIRD EXAMPLE...
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- Spring '09
- 3 years, finch, Open Learning, song nuclei