ANATOMY OF THE EAR  
Tympanic Membrane
(Left)

Tympanic Membrane
(Left)

Description : The fibrous middle layer of the pars tensa, which contains two layers of fibers: the circumferential and the radial fibres.

The "cone of light" which can be seen extending downwards and backwards, ending at the apex of the triangular cone of reflected light is the only portion of the tympanic membrane wich is situated at right angles to the central axis of the external auditory canal.

The long process of the incus and its articulation with the head of the stapes may frequently be seen through the posterosuperior quadrant of a thin normal tympanic membrane.

The chorda tympani nerve which supplies taste to the anterior two‑thirds of the tongue is sometimes visible in the posterosuperior quadrant, passing horizontally across the middle ear just behind the tympanic membrane between the long process of the incus and the handle of the malleus.

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