C. elegans have played a fundamental role throughout many science disciplines. They are used in discoveries in fields such as biology, neuroscience, and psychology, from being the first organism to have its connectome mapped, to being an animal model in hopes of alleviating symptoms and curing diseases for other organisms. These nematodes have been included in many crucial studies such as mitochondrial disease, Parkinson’s disease, immunity research, heart disease, kidney disease, and neurological disorder studies. When the roundworms were sequenced, traces for PARK1, were not found. Thus, making them suitable research models for Parkinson’s disease according to Yokoyama (2020). Although roundworms are small, some researchers believe that these organisms can uncover truths and facts relating to the human brain. By studying C. elegans, researchers have a clue of what is occurring in human brains, therefore they can best apply their findings to much needed causes. Thus, making C. elegans one of the most important models for human brain development.