[TA] a group of axons that originate from neurons primarily in lumbosacral levels; ascend ipsilaterally and in close apposition to the posterior spinocerebellar tract; and terminate in the lateral, medial, and spinal vestibular nuclei. Some of these axons may be collaterals of posterior spinocerebellar fibers. SYN: tractus spinovestibularis [TA].
