A mosaic pattern characterizes the evolution of the avian brain
Diversity in vertebrate brain size and composition is thought to arise from either developmental constraints that cause coordinated changes between brain regions or a mosaic model, whereby changes in individual brain regions are independent of changes in other brain regions. These two mechanisms wer...
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| Veröffentlicht in: | Proceedings of the Royal Society. B, Biological sciences Biological sciences, 2004-05, Vol.271 (Suppl 4), p.S148-S151 |
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| container_end_page | S151 |
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| container_issue | Suppl 4 |
| container_start_page | S148 |
| container_title | Proceedings of the Royal Society. B, Biological sciences |
| container_volume | 271 |
| creator | Iwaniuk, Andrew N. Dean, Karen M. Nelson, John E. |
| description | Diversity in vertebrate brain size and composition is thought to arise from either developmental constraints that cause coordinated changes between brain regions or a mosaic model, whereby changes in individual brain regions are independent of changes in other brain regions. These two mechanisms were tested in birds using multiple regression analyses. Across 13 orders, significant correlations were present between some brain regions, but not all. Most of the correlated changes reflect the connectivity between different brain components, such that regions with the most interconnections are correlated with one another but not other brain regions. Whether mosaic changes are characteristic of brain regions or systems in birds, however, to our knowledge, remains to be investigated. |
| doi_str_mv | 10.1098/rsbl.2003.0127 |
| format | Article |
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| identifier | ISSN: 0962-8452 |
| ispartof | Proceedings of the Royal Society. B, Biological sciences, 2004-05, Vol.271 (Suppl 4), p.S148-S151 |
| issn | 0962-8452 1471-2954 |
| language | eng |
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| source | MEDLINE; JSTOR Archive Collection A-Z Listing; PubMed Central |
| subjects | Animals Biological Evolution Biometry Birds Birds - anatomy & histology Body Weights and Measures Brain - anatomy & histology Brain Structure Cerebellum Connected regions Correlated Evolution Diencephalon Evolution Mammals Medulla oblongata Mesencephalon Models, Biological Mosaic Phylogeny Regression Analysis Superior colliculus |
| title | A mosaic pattern characterizes the evolution of the avian brain |
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