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Updated April 11, 2017. The auditory ossicles are a chain of small bones in the middle ear that transmit sound from the outer ear to the inner ear as a mechanical vibration. The names of these three bones are taken from Latin. The malleus is also known as the hammer, the incus is also called the anvil, and the stapes is known as the stirrup..
It consists of three parts: the outer ear, the middle ear, and the inner ear. The middle and inner ear are located deep in the temporal bone of the skull. The vestibulocochlear nerve (eighth cranial nerve) is responsible for relaying hearing and balance signals from the inner ear to the brain. The outer ear funnels sound down the ear canal to the eardrum, which vibrates three tiny bones called ossicles (malleus, incus, and stapes) in the middle ear (Fig.