Eardrum

Definition

The eardrum, or tympanic membrane, is a thin tissue that separates the external ear canal from the middle ear. It vibrates in response to sound waves, facilitating hearing.

5 Must Know Facts For Your Next Test

1. The eardrum transmits sound from the air to the ossicles inside the middle ear.
2. It can be damaged by infection, trauma, or sudden changes in pressure.
3. Eardrum perforation can lead to hearing loss and increased susceptibility to ear infections.
4. Otic drugs are often administered to treat infections and conditions affecting the eardrum and surrounding structures.
5. Proper functioning of the eardrum is critical for effective hearing and balance.

Review Questions

• What role does the eardrum play in the process of hearing?
• How can an eardrum become damaged?
• Why is it important for nurses to understand conditions affecting the eardrum when administering otic drugs?

Related terms

Ossicles: Small bones in the middle ear (malleus, incus, stapes) that transmit sound vibrations from the eardrum.

Tympanoplasty: Surgical procedure to repair a perforated eardrum.

Otitis Media: Inflammation or infection of the middle ear, often involving fluid buildup behind the eardrum.