There are several pathways for unconscious proprioception. These transmit information necessary for the maintenance of normal muscle tone and posture as well as for coordination. Much of this information arises from muscle stretch and tension receptors and also from spinal interneurons that participate in reflexes and regulate motor output. While this is important information if movements are to be performed smoothly, there is very little conscious awareness of these sensations. The pathways for unconscious proprioception primarily terminate in the ipsilateral cerebellum, in two topographic maps in the spinocerebellum (anterior lobe and paramedian lobule). Some of these pathways, such as the dorsal spinocerebellar tract and the cuneocerebellar tract, require only 2 neurons, while some pathways are polysynaptic. Many of the polysynaptic pathways synapse on neurons of brain stem nuclei that, in turn, project to the cerebellum (so-called, "precerebellar" nuclei).