spinomesencephalic fibers

spinomesencephalic fibers

[TA] a composite group of fibers traveling in the anterolateral system (spinal lemniscus) and ending in the mesencephalon; includes spinotectal fibers [TA] to the deeper layers of the superior colliculus and spinoperiaqueductal fibers [TA] that terminate in the periaqueductal gray matter. Synonym(s): fibrae spinomesencephalicae [TA]