The cerebellum sits between the cerebral cortex and the spinal cord and is referred to as a “comparator.” It compares one stream of information coming down from the cortex, and another stream of information coming up from the spinal cord. The cortex is sending commands—the plan of action—down to your muscles via the corticospinal and corticobulbar pathways and the cerebellum is getting a sample of those commands. Meanwhile as your limb is moving, there is information about proprioception coming into the CNS and traveling up to the cerebellum. The cerebellum then compares what you plan to do with what is really happening and then adjusts or fine tunes the movement by projecting back to the thalamus and cerebral cortex. Lesions to the cerebellum do not result in paralysis, or loss of strength, but result in an intention tremor.