The Ear and Associated Structures: Part I

Abstract

The ear consists of the external, middle and internal ear. The external and middle ear are mainly concerned with the transference of sound to the internal ear, where energy from the sound waves is processed into electrical signals for the brain. In addition to this function, the inner ear also contains the “organ for equilibrium” i.e. the balance organ. Although the tympanic membrane separates the middle ear from the external ear, the middle ear communicates with the external environment (through the nasopharynx) via the pharyngotympanic (Eustachian) tube.