There is also a spinotectal tract that runs from the cord to the superior colliculus (part of the tectum). The superior colliculus is concerned with vision and eye movement. What effect these spinal afferents have on tectal function is uncertain. Completely surrounding the gray matter of the cord is the propriospinal tract. This tract conveys information from one cord segment to another as for example the long spinal reflex that was presented in physiology last semester.