The equivalent of the organ of Corti in non-mammalian tetrapods although its shape has evolved into a more extended structure in mammals.

The spiral EPITHELIUM containing sensory AUDITORY HAIR CELLS and supporting cells in the cochlea. Organ of Corti, situated on the BASILAR MEMBRANE and overlaid by a gelatinous TECTORIAL MEMBRANE, converts sound-induced mechanical waves to neural impulses to the brain.

Synonyms: Corti Organ, Papilla, Basilar, Organ of Corti, Organ, Spiral, Organs, Spiral, Organ, Corti's, Basilar Papilla, Cortis Organ, Corti's Organ, Spiral Organ, Spiral Organs