abnormal vestibulocochlear nerve morphology abnormal vestibular nerve morphology MP:0004718 MPheno.ontology abnormal nervus vestibularis morphology abnormal pars vestibularis nervi vestibulocochlearis morphology abnormal superior part of vestibulocochlear nerve morphology abnormal vestibular part of vestibulocochlear nerve morphology abnormal vestibular root of cranial nerve VIII morphology any structural anomaly in the part of the vestibulocochlear nerve [CN VIII] peripheral to the vestibular root; it is composed of the central processes of bipolar neurons that have the terminals of their peripheral processes on the hair cells in the ampullae of the semicircular ducts and the maculae of the saccule and utricle, and cell bodies of the vestibular ganglion