The lateral wall

• The tympanic membrane (Fig. 70.2)—the handle of the malleus embedded in its middle layer. This is crossed by the chorda tym-pani, above which is the pars flaccida. The ' cone of light is the reflection of the light from the auriscope.

• The epitympanic recess (attic)—the part of the middle ear cavity above the tympanic membrane.

• The ossicles: the malleus, incus and stapes—the stapes engages with the oval window. The ossicles transmit vibrations of the membrane to the inner ear.

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