The Organ of Corti

The Organ of Corti

Description : The organ of Corti (the spiral organ of hearing) consists of a group of modified neuroepithelial cells overlying the basilar membrane.

The pillar cells form a tunnel which divides the organ of Corti into inner and outer parts.

A single row of hair cells is present on the inner side and three rows of hair cells are present on the outer side.

The hair cells project stereocilia into the overlying tectorial membrane.

Nerve fibres in contact with hair cells pass through the spiral lamina to the spiral ganglion within the modiolus and thence to the internal auditory canal as the cochlear nerve.

The auditory pathway then continues via the brain stem to reach the higher auditory centres of the cerebral cortex.

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