Yes. The worm c.elegans has 302 neurons, connected in a specific way. From the article: "For almost 30 years, the list of connections between individual neur

Yes. The worm c.elegans has 302 neurons, connected in a specific way. From the article: "For almost 30 years, the list of connections between individual neurons has been known. Despite the low number of neurons, its neuronal networks possesse a high degree of complexity and sophisticated behavioral output; the worm thus represents an animal of choice to study brain function."