April10th2008 - RA Positions Available Dr. Susan Riveras...

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1 RA Positions Available • Dr. Susan Rivera’s Neurocognitive Development Lab (at the Center for Mind and Brain) is seeking research assistants who will: – assist in analyzing structural and functional MRI data to examine abnormal brain morphology and activity – be trained to trace brain structures on MRI images – learn to locate brain structures on MRI images that will be used as guides in the tracings. • Ideally seeking a student with sophomore or junior class standing who is willing to remain with the lab for at least one year • 199 Credit (at least 2 units) • For more information, please contact: Lien Le: 530-747-3808 or, lble@ucdavis.edu Evolution of Nervous System Describing Traits • Homologous: traits that are similar due to common ancestry • Analogous: traits that share similar function but arose due to convergent evolution Brain Evolution: Why Should I Care? • If you’re interested in understanding how mechanisms of the brain and behavior work, eventually you need to do an experiment • Studies of brain evolution show that similar mechanisms are used across species, and help us to interpret experimental results Why do species look alike? • They are closely related – These species shared a common ancestor in recent history
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2 Convergence • Both bats and birds have wings, yet the structures of the wings are fundamentally different between the two. • Traits arose independently (convergence) – Traits arose because they result in an increase in survival or reproduction. Homology in the Brain • Human brains are obviously different from other species (e.g. rat) • However, there are striking similarities Reading Cladograms • C & D are each other’s closest relatives. They descended from species 1, which
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April10th2008 - RA Positions Available Dr. Susan Riveras...

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