abnormal vestibulocochlear nerve morphology abnormal cochlear nerve morphology MP:0004716 MPheno.ontology abnormal auditory nerve morphology abnormal cochlear part of vestibulocochlear nerve morphology abnormal inferior part of vestibulocochlear nerve morphology abnormal nervus cochlearis morphology abnormal pars cochlearis nervi vestibulocochlearis morphology any structural anomaly in the part of the vestibulocochlear nerve [CN VIII] peripheral to the cochlear root; composed of the central nerve processes of the bipolar neurons of the spiral ganglion, which have their peripheral processes on the four rows of neuroepithelial cells (hair cells) of the spiral organ