OTOF and Pelizeaus-Merzbacher spectrum disorder: Reported causes of presynaptic auditory neuropathy include perinatal hypoxia, OTOF mutations, and mitochondrial mutations, while reported causes of postsynaptic auditory neuropathy include prematurity, kernicterus, autosomal dominant optic atrophy, Pelizaeus-Merzbacher disease, and CND14,19.