Two lobes that make up the lowest part of the cerebellum; one at the bottom of each hemisphere. (Many doctors claim that the cerebellar tonsils have no function of their own, however damage to either or both have been known to produce symptoms including: dizziness, unsteady gait, poor depth perception, sensations of swaying/floating, nausea or vomiting, fatigue, brain fog, insomnia, loss of memory, aphasia, and becoming easily confused.)