has part has part has_part characteristic of has modifier vestibular hair cell abnormal vestibular hair cell morphology neuron degeneration vestibular hair cell degeneration MPheno.ontology degeneration or loss of the sensory epithelial cells of the maculae and cristae of the membranous labyrinth of the inner ear which are normally in synaptic contact with the vestibular nerve MP:0004324 abnormal degenerate