Mastoid bone

Mastoid Bone

The Mastoid bone is a prominent part of the temporal bone of the skull. It is located in the posterior part of the temporal bone, just behind the ear. The mastoid bone is pyramidal in shape and contains air cells that communicate with the middle ear, known as the mastoid process.

Anatomy

The mastoid bone is made up of two parts: the mastoid process and the mastoid part of the temporal bone. The mastoid process is a conical projection of bone that serves as a point of attachment for several muscles that move the head. The mastoid part of the temporal bone is the posterior (back) part of the temporal bone, one of the bones that make up the skull.

Function

The primary function of the mastoid bone is to provide a point of attachment for certain muscles of the neck. These muscles are involved in movements of the head. The air cells within the mastoid bone also help to lighten the weight of the skull.

Clinical Significance

Infections of the mastoid bone, known as mastoiditis, can occur if an ear infection spreads to the mastoid bone. This can cause a range of symptoms, including pain, swelling, and redness over the mastoid bone, as well as hearing loss. Treatment typically involves antibiotics and sometimes surgery.

See Also

• Temporal bone
• Mastoiditis
• Skull