Sea slugs Tritonia diomedea (left) and Hermissenda crassicornis (right) have similar nervous systems. However, when it comes to swimming (shown here) they couldn’t be more different. By comparing and contrasting the neurons responsible for swimming in these molluscs, researchers have identified differences in the cells’ responses to the chemical serotonin, which may contribute to such differences in behavior.
Michael W. Richardson
Michael W. Richardson is a writer and editor based in Brooklyn, New York, covering topics ranging from the brain and behavior to the environment.
Lillvis JL, Katz PS. Parallel Evolution of Serotonergic Neuromodulation Underlies Independent Evolution of Rhythmic Motor Behavior. The Journal of Neuroscience. 6 February, 33(6): 2709-2717 (2013).
Popular articles on BrainFacts.org
Check out the Image of the Week Archive.
See how discoveries in the lab have improved human health.
Advancing science, improving health.
Some pages on this website provide links that require Adobe Reader to view.