A cerebral nucleus was a part of the brains of both Trill hosts and their symbionts.

In 2369, Doctor Julian Bashir explained this to Ilon Tandro during the murder trial of Curzon Dax. (DS9: "Dax")

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.