has part has part has_part characteristic of has modifier vestibular hair cell decreased sensory neuron number abnormal vestibular hair cell number decreased vestibular hair cell number MPheno.ontology MP:0004328 reduced vestibular hair cell number decreased number of cells in the sensory epithelium of the maculae and cristae of the membranous labyrinth of the internal ear which are normally in synaptic contact with the vestibular nerve abnormal decreased amount