Embryology of Inner Ear and Its Malformation

Abstract

Embryologically, the cochlea and the auditory sensory cells develop until 24 weeks and are completed at relatively late stage of the fetus compared with the vestibular organs and vestibular sensory cells. Neuronal myelination in human brain starts around gestation month 4. The auditory system belongs to older strains in the order of phylogenesis, and both neuronal myelination and development start late. The role of the auditory sense in the cochlea is classified into auditory perception and directional hearing in newborns and infants. In development of the brain, hearing can accelerate speech, language, sound localization, and selective attention.