Tract of neuraxis, each instance of which is a a group of nerve fibers in the lateral funiculus of the lower thoracic and lumbar segments of some spinal cord, arising mostly in the opposite gray matter and ascending to some cerebellum by way of the anterior part of the lateral funiculus and then the superior cerebellar peduncle; they carry sensory impulses activated by nerve endings in somemskin, muscles, tendons, and joints.