Synonyms for the mastoid bone include the mastoid process, mastoid apophysis, mastoid portion, and mastoid prominence. The mastoid bone is a critical component of the human skull, situated behind the outer ear and directly below the temporal bone. It is made up of a complex network of air spaces and is known for its distinctive uneven texture. The mastoid bone plays an essential role in the anchoring of various neck muscles and is a common site of infection and inflammation in some individuals. It is also a critical landmark for surgical procedures in the area of the ear, nose, and throat.