Studies are reported on the suppression of reflexly induced and cerebrally induced movements by electrical activation in the cat of the anterior cerebellar lobe and paramedian lobules plus nearby folia. Frequencies of electrical stimuli of 200 to 300 pulses per sec.[long dash]usually 300[long dash]were found to be most effective for cerebellar stimulation. The pathway mediating this effect is: cerebellar cortex to nucleus fastigii to bulbar ventricular formation, thence to the spinal cord via the reticulo-spinal tracts. Evidence is presented to show that suppressor areas, facilitatory areas, and the tactile areas of the cerebellum are practically co-extensive.