Mastoid
Mastoid
Mastoid (/ˈmæstɔɪd/), from the Greek mastoeides meaning "breast-shaped", is a part of the temporal bone of the skull located behind the ear. The mastoid is filled with air cells that are connected to the middle ear. It plays a crucial role in the drainage of the middle ear.
Etymology
The term "mastoid" is derived from the Greek word mastoeides, which means "breast-shaped". This is due to the resemblance of the mastoid process to a nipple.
Anatomy
The mastoid process is a conical prominence of the mastoid part of the temporal bone. It is located behind the external ear and serves as an attachment site for several muscles that move the head.
The mastoid air cells are small, air-filled spaces in the mastoid process. They are connected to the middle ear and help to drain it.
The mastoid notch is a deep groove on the lower surface of the mastoid process. It serves as an attachment site for the digastric muscle.
Related Terms
- Temporal bone: The bone in the skull where the mastoid is located.
- Middle ear: The part of the ear that is connected to the mastoid air cells.
- Digastric muscle: One of the muscles that attach to the mastoid process.
Diseases and Conditions
- Mastoiditis: An infection of the mastoid bone, often caused by untreated middle ear infection.
- Mastoidectomy: A surgical procedure to remove part or all of the mastoid process.
External links
- Medical encyclopedia article on Mastoid
- Wikipedia's article - Mastoid
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