paranasal

(adjective)

Paranasal sinuses are a group of four paired air-filled spaces that surround the nasal cavity, above the eyes, between the eyes, and behind the ethmoids.

Related Terms

Examples of paranasal in the following topics:

  • Paranasal Sinuses

    • The paranasal sinuses (four, paired, air-filled spaces) surround the nasal cavity, and are located above and between the eyes, and behind the ethmoids.
    • Paranasal sinuses are a group of four, paired, air-filled spaces that surround the nasal cavity (maxillary sinuses), above the eyes (frontal sinuses), between the eyes (ethmoid sinuses), and behind the eyes (sphenoid sinuses).
    • The maxillary sinuses (also called the maxillary antrechea, the largest of the paranasal sinuses) are located under the orbits in the maxillary bones.
    • The paranasal sinuses form developmentally through excavation of bone by air-filled sacs (pneumatic diverticula) from the nasal cavity.

  • Nose and Paranasal Sinuses

    • The nose and paranasal sinuses form much of the upper respiratory tract, along with the pharynx.
    • The paranasal sinuses are a group of four, paired, air-filled spaces, lined with respiratory epithelium (ciliated columnar epithelium).

  • Sinusitis

    • Sinusitis, the inflammation of the paranasal sinuses, is a very common condition in the US with potentially dangerous complications.
    • Sinusitis is inflammation of the paranasal sinuses, which may be due to infection, allergy, or autoimmune issues.

  • Structures Used in Voice Production

    • Resonance: The structures of the upper respiratory tract—particularly the soft palate of the mouth, the nasopharynx, and the paranasal sinuses—resonate and amplify the vibration of the vocal folds, making the sound louder and changing its tone.