BS 178 Peter Sterling
Brain Science with Ginger Campbell, MD: Neuroscience for Everyone
00:00
Evolutionary Development and the Role of Dopamine
Bilaterally symmetrical organisms appeared around 500 million years ago, leading to arthropods and vertebrates which bequeathed 93% of our proteins, including dopamine. C. elegans, a simple worm with 302 neurons, uses dopamine as a reward signal. The mechanisms of rewarding behavior with dopamine have been present for half a billion years. As biological systems become more complex, homeostatic mechanisms become more energy-expensive.
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