[Vestibulocochlear anastomosis in the brain stem of the guinea pig. Preliminary report].

A conspicuous fibre bundle running through the vestibular nuclear complex into the cochlear nucleus could be detected after tracing the superior vestibular nerve branch and the macula sacculi of the guinea pig with HRP (horseradish peroxidase). Considering certain electrophysiological findings, it is quite reasonable to believe that these fibres are indeed primary vestibular afferent fibres in synaptic contact with secondary cochlear neurons.