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Original Articles
February 1962

Sensory Neural Deafness 1959-1960

Arch Otolaryngol. 1962;75(2):176-180. doi:10.1001/archotol.1962.00740040182017

Our understanding of sensory neural deafness in man has been increased through various experimental, histopathological, and clinical studies. New information on the structure and functioning of the normal cochlea and its central pathways is obtained through a wide variety of experimental methods.

Iurato1 has obtained elegant photographs with the electron microscope of the hair cells and supporting cells of the organ of Corti of the rat. He points out some of the structural differences between the inner and outer hair cells that probably have functional significance.

For example, almost all of the nerve endings on the outer hair cells are richly granulated, while in the inner hair cells some endings were also of the poorly granulated variety. The size of the hairs on the inner hair cells is twice that of the outer hair cells. In the outer hair cells the intermediate zone is far larger, and there

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