The aditus to mastoid antrum (otomastoid foramen) is a large, irregular opening [1] upon the posterior wall of the tympanic cavity by which the mastoid antrum (situated posteriorly) communicates with the epitympanic recess of the tympanic cavity (situated anteriorly). [2]

2006年7月15日 · The antrum is a large aircell superior and posterior to the tympanic cavity and connected to the tympanic cavity via the aditus ad antrum. The epitympanum or attic is the upper portion of the tympanic cavity above the tympanic membrane, and contains the head of the malleus and the body of the incus.

The entrance to the antrum (Aditus to mastoid antrum) is a large irregular aperture, which leads backward from the epitympanic recess into a considerable air space, named the tympanic or mastoid antrum.

2020年7月9日 · The mastoid antrum (plural: mastoid antra) (also known as tympanic antrum or Valsalva antrum) is an air space (up to 1 cm in size) lying posterior to the middle ear and connected to it by a short passageway, the aditus ad antrum.

2025年1月21日 · The aditus to mastoid antrum is a small, yet vital passageway within the middle ear, connecting the tympanic cavity to the mastoid antrum and mastoid air cells. It serves as an important anatomical route that facilitates communication between …

2016年1月15日 · The antrum is a large aircell superior and posterior to the tympanic cavity and connected to the tympanic cavity via the aditus ad antrum. It is surrounded by smaller mastoid aircells.

2019年8月20日 · The cone-shaped antrum is located in the anterosuperior part of the mastoid portion of the temporal bone and communicates with the epitympanum via a narrow channel termed the aditus ad antrum. The antrum is surrounded by smaller variable-sized mastoid air cells (see Fig. 21-1K ).

In audiology, the term “aditus” refers to an opening or passageway that connects the mastoid air cells to the middle ear. It serves as a communication pathway between these two areas of the ear, allowing for the exchange of air, pressure, and sound …

2020年8月5日 · The patency and dimensions of the aditus ad antrum were assessed by saline water test. In 41% cases saline test showed blockade, on further drilling patency achieved in 27 cases with minimal drilling and dissection of mucosa with or without fibrotic mucosal bands.

From a clinical-radiologic standpoint, there are a limited number of structures and disease entities in the temporal bone with which one must be familiar in order to proficiently interpret a computed tomographic or magnetic resonance imaging study of the temporal bone.