Stapes

Definition

The stapes is the smallest bone in the human body and is located in the middle ear. It plays a crucial role in transmitting sound vibrations from the middle ear to the inner ear.

5 Must Know Facts For Your Next Test

1. The stapes is one of three ossicles in the middle ear; the others are the malleus and incus.
2. It has a stirrup-like shape, which helps it efficiently transmit sound vibrations.
3. The footplate of the stapes rests on the oval window, a membrane-covered opening to the inner ear.
4. Conductive hearing loss can occur if the stapes becomes immobilized due to conditions like otosclerosis.
5. Stapedectomy is a surgical procedure that may be performed to replace or repair a damaged stapes.

Review Questions

• What role does the stapes play in hearing?
• Name and describe two other ossicles found in conjunction with the stapes.
• What medical condition can affect the mobility of the stapes, potentially leading to hearing loss?

Related terms

Malleus:

A hammer-shaped bone that transmits sound vibrations from the eardrum to the incus.

Incus:

An anvil-shaped bone that connects the malleus to the stapes in the middle ear.

Otosclerosis: A condition characterized by abnormal bone growth around the stapes, leading to hearing loss.