Rhodes research interests relate to neuronal plasticity. One interest includes understanding the role of voluntary exercise via wheel running in inducing the formation of new neurons in the dentate gyrus of the hippocampus.[2] A major goal of this research would be to understand the biological organization, from gene and protein expressions, that regulate neurogenesis in the hippocampus.
Rhodes was one of the developers of the Drinking in the Dark model in mice. In this model, a specific mouse strain is found to voluntarily drink to the levels of intoxication. Many drugs used to treat alcoholism in humans have been shown to lead to reduced ethanol consumption in mice used in this model.[3][4]
Another interest includes understanding changes in neural circuitry due to drug addiction. Research from his lab has shown that adult and adolescent mice given equal amounts of cocaine display significant differences in locomotor stimulation.[5] His research has also shown that voluntary behaviors such as exercise could activate the same neurobiological pathways as alcohol and drug addiction.[6] Most recently, his lab is investigating the impact of exercise on drug associative learning.[7] As a career project, Rhodes tries to understand the evolution of behavior by selectively breeding for hyperactivity in mice. The overall goal is to identify how genes regulate multiple levels of biological organization.[8]
Currently, Rhodes has also established a marine biology laboratory to research brain plasticity in clownfish undergoing sex change as a result of removal of the largest female from the group.[9][10]
Clark, P.J.; Brzezinska, W.J.; Thomas, M.W.; Ryzhenko, N.A.; Toshkov, S.A.; Rhodes, J.S. (2008). "Intact neurogenesis is required for benefits of exercise on spatial memory but not motor performance or contextual fear conditioning in C57BL/6J mice". Neuroscience. 155 (4): 1048–58. doi:10.1016/j.neuroscience.2008.06.051. PMID18664375. S2CID15051523.
Rhodes, J. S.; Kawecki, T. (2009). "Behavior and Neurobiology". In Garland, T.; M. R. Rose (eds.). Experimental Evolution. University of California Press. pp. 263–300.