abnormal vestibular hair cell morphology abnormal type II vestibular cells MP:0004429 MPheno.ontology any structural anomaly in the cylindrical sensory cells of the maculae and cristae of the vestibular labyrinth of the inner ear which are normally contacted by bouton endings of afferent and efferent neurons; afferent and efferent nerve fibers of the vestibular nerve synapse with them; from the apical end of each cell a bundle of stereocilia and a kinocilium extend into the otolithic membrane of the maculae or the cupula of the cristae