Where is the paranasal sinuses located?

Where is the paranasal sinuses located?

One of many small hollow spaces in the bones around the nose. Paranasal sinuses are named after the bones that contain them: frontal (the lower forehead), maxillary (cheekbones), ethmoid (beside the upper nose), and sphenoid (behind the nose).

Where are all your sinuses located?

Your sinuses are air spaces in your skull and facial bones that make up the upper part of your respiratory tract from your nose into your throat. The sinuses are in your forehead (frontal sinuses), inside your cheekbones (maxillary sinuses), and behind the nose (ethmoid and sphenoid sinuses).

What are the 5 sinuses?

The paranasal sinuses include the following types of sinuses:

• A maxillary sinus in each cheek.
• Between six and 12 ethmoid sinuses on each side of the nose between the eyes.
• A frontal sinus on each side in the forehead.
• A pair of sphenoid sinuses behind the ethmoid sinuses.

Which view shows all the paranasal sinuses?

Traditionally, conventional radiography was used to examine the paranasal sinuses. The standard radiographic sinus series consists of four views: lateral view, Caldwell’s view, Waters’ view, and submentovertex or base view. The lateral view shows the bony perimeter of the frontal, maxillary, and sphenoid sinuses.

Where do the paranasal sinuses drain?

The paranasal sinuses are divided per their drainage systems into anterior sinuses group (maxillary, anterior ethmoid, and frontal sinuses) which drains into the middle meatus through the anterior ostiomeatal unit.

What is sinus ostium?

The principle maxillary sinus ostium (PMO) and accessory sinus ostium (i.e., accessory ostium) are the anatomical structures of the middle meatus that are referred to as the osteomeatal complex. This complex contributes to the final drainage pathway of the anterior ethmoidal, maxillary and the frontal sinuses.

What are sinuses anatomy?

A sinus is a sac or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue. In common usage, “sinus” usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it.

Where is the maxillary sinus?

A type of paranasal sinus (a hollow space in the bones around the nose). There are two large maxillary sinuses, one in each of the maxillary bones, which are in the cheek area next to the nose.

What are sinuses quizlet?

Air spaces in the bones of the skull.

What is the sinus ostium?

Where does sphenoid sinus drain?

The sphenoid sinus drains into the nose above the superior turbinate. The lateral wall of the sphenoid sinus contains the medial wall of the optic canal and the internal carotid artery. Because of this close anatomic relationship, sphenoid sinusitis may cause damage to the optic nerve.