abnormal cochlear inner hair cell morphology abnormal cochlear IHC efferent innervation pattern MP:0004633 MPheno.ontology any changes in the morphology of the normally dense plexus of efferent terminals that contact radial fibers of the spiral ganglion below cochlear IHCs or of the sparser plexus of terminals positioned around IHC somata; normally, lateral olivocochlear neurons, which are found in and/or around the lateral superior olive, project mainly to the ipsilateral cochlea and terminate mostly on dendritic fibers below IHCs abnormal cochlear sensory neuron innervation pattern