Auditory Function

Auditory is a superb sense that allows us to situate ourselves in the environment. It allows us to detect potential danger, to identify what is familiar as well as to perceive human speech. Hearing depends on the proper functioning of a group of organs to function at its best.

The Ear 

An organ of sound and perception When sound is heard, it signifies that air is in movement. This movement of air is captured by the pinna and enters the external auditory canal. At the back of this canal is the eardrum which is very fine membrane that vibrates. The vibration of the eardrum then spreads to the 3 small bones of the middle ear , the malleus, incus, and stapes, that each in turn begins to move. The stapes supports the wall of the internal ear, which is full of liquid. This liquid movs and causes the ciliated cells to move (like lashes) inside the cochlea. Those that are at the base of the cochlea react to the highest frequency sounds, those that are above the cochlea react to the lowest frequency sounds. Inside the cochlea, the Corti translates the movements of ciliated cells into an electronic message that goes to the auditory nerve and the brain.

Beyond the Ear

 The Brain The message that is heard is sent in electrical form to the auditory nerve. This message follows a complex path towards different parts of the brain in both hemispheres. For example ; certain cerebral regions allow you to to determine where sound is coming from, some what those sounds signify, while others interpret speech.