How Do You Spell SINUS MASTOIDEUS?

1. Sinus mastoideus, commonly known as the mastoid sinus, is a small air-filled cavity located within the mastoid process of the temporal bone, behind the ear. The mastoid process is the prominent bony protuberance that can be felt behind the lower part of the ear.

   The sinus mastoideus is lined with a mucous membrane and is connected to the middle ear cavity through a series of small openings called tympanic antrum and aditus ad antrum. This connection allows for the equalization of pressure between the middle ear and the mastoid sinus and helps in the drainage of mucus and secretions.

   The sinus mastoideus plays a crucial role in the respiratory and ventilatory functions of the middle ear. It helps to regulate the air pressure inside the ear, ensuring the proper functioning of the eardrum (tympanic membrane) and the ossicles (small bones) of the middle ear.

   The mastoid sinus is also involved in various pathological conditions. Inflammation or infection of the mastoid sinus, known as mastoiditis, can occur as a complication of untreated middle ear infections (otitis media). Mastoiditis can be a serious condition, leading to symptoms such as ear pain, fever, swelling, and tenderness behind the ear. Prompt medical treatment, including antibiotics and sometimes surgical intervention, is necessary to prevent further complications.

   In summary, the sinus mastoideus is a small, air-filled cavity located within the mastoid process behind the ear. It helps regulate air pressure in the middle ear and plays a role in the drainage of mucus. However, it can also be a site of infection, leading to mastoiditis if left untreated.

2. One of the cells in the mastoid process of the temporal bone.

   A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.

Common Misspellings for SINUS MASTOIDEUS

The word "sinus mastoideus" is derived from Latin and Greek.

The term "sinus" comes from Latin and means "curve", "fold", or "bay". In anatomy, it refers to a cavity or hollow space.

"Mastoideus" is of Greek origin, derived from "mastos", meaning "breast" or "breast-like", and "eidos", meaning "form" or "shape". In this case, it refers to the mastoid process, which is a prominent bony structure behind the ear.

Therefore, "sinus mastoideus" can be translated as the "mastoid sinus" or "sinus of the mastoid process", referring to a cavity or hollow space located within the mastoid bone.