Axonal projections of utricular afferents to the vestibular nuclei and the abducens nucleus in cats.

Axonal projections of utricular (UT) afferents in cats were examined by three approaches: recordings of field potentials, labelling of UT nerve fibres by localized infusion of horseradish peroxidase (HRP) and intraaxonal infusion of HRP into a single UT afferent. UT afferents project principally into the rostral part of the descending nucleus and the ventral part of the lateral nucleus. Projection into the superior and the medial nuclei and the ipsilateral abducens nucleus were also observed.