abnormal cochlear inner hair cell morphology abnormal cochlear hair cell stereociliary bundle morphology abnormal inner hair cell stereociliary bundle morphology MP:0004532 MPheno.ontology abnormal IHC bundles abnormal IHC stereocilia abnormal IHC stereociliary bundles any structural anomaly or disruption of the typically linear or U-shaped pattern of arrangement of mechanosensitive hair bundles located at the apical end of cochlear IHCs; each hair bundle is normally composed of ~100 nonmotile, actin-filled microvilli (stereocilia) arranged in rows of increasing height and coupled to one another by morphologically distinct links: tip links, horizontal top connectors, shaft connectors, and ankle links; most hair bundles also possess a single motile kinocilium immediately adjacent to the tallest row of stereocilia; a fifth link type, the kinocilial link, connects the kinocilium to its neighboring stereocilia