Frontal sinus

Frontal Sinus

The Frontal sinus is one of the four pairs of paranasal sinuses that are situated behind the brow ridges. The frontal sinuses are located in the frontal bone and are lined with cells that make mucus to keep the nose from drying out.

Anatomy

The frontal sinuses are asymmetrical and differ in size and shape in different individuals. They are absent at birth and begin to develop around the age of two, reaching their full size in adolescence. They are separated from each other by a thin bony septum, which often deviates to one or the other side, making the sinuses asymmetrical.

Function

The function of the frontal sinuses is not clearly understood. Some theories suggest that they serve to lighten the weight of the skull, to humidify and heat inhaled air, to increase the resonance of speech, and to serve as a crumple zone to protect the brain and eyes in case of trauma.

Clinical significance

The frontal sinuses are prone to inflammation and infection, a condition known as sinusitis. This can be caused by allergies, bacterial or fungal infections, or anatomical problems such as a deviated septum. Symptoms of sinusitis can include headache, facial pain, nasal congestion, and fever.

Treatment

Treatment for sinusitis can include antibiotics, decongestants, and nasal sprays. In severe cases, surgery may be required to drain the sinuses and remove any obstructions.

See also

• Paranasal sinuses
• Sinusitis
• Frontal bone

References

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  Diagram of the frontal sinus anatomy
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  Illustration of the nose and nasal cavities
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  Frontal sinus