Separate 'loops' interconnect the dentate nucleus of the cerebellum with multiple cortical areas in the frontal lobe. In fact, discrete regions of the dentate project via the thalamus to specific motor and non-motor areas (Dum and Strick, SFN Abstr., 2002). To explore the functional correlate of this topographic organization we examined patterns of 2-deoxyglucose (2DG) uptake in behaving monkeys. The monkeys were trained to perform either a licking task (n=2) or visually-guided reaching movements for fluid reward (n=2). These tasks generated clear patterns of activation in multiple areas of the cerebral cortex. For example, the licking task activated the face areas of M1 and the SMA. Intense 2DG uptake was additionally present in the arm representation of a number of motor areas in the frontal lobe during the reaching task. In the dentate, we found patterns of activation that were consistent with the patterns of cortical activation. For example, in licking animals, we found activation in dentate regions th...