Ethmoidal sinus

Ethmoidal sinus is one of the four pairs of paranasal sinuses that are situated within the skull. They are located between the nose and the eyes and are responsible for lightening the weight of the skull, humidifying and heating inhaled air, increasing the resonance of speech, and serving as a crumple zone to protect vital structures in the event of facial trauma.

Anatomy

The ethmoidal sinus consists of numerous small cavities located in the ethmoid bone, between the nose and the eyes. These cavities are divided into anterior, middle, and posterior groups. The anterior and middle groups drain into the middle meatus of the nose, while the posterior group drains into the superior meatus.

Function

The ethmoidal sinuses, like other paranasal sinuses, play a role in humidifying and heating the air we breathe in. They also contribute to the resonance of our voice and serve as a buffer against facial trauma.

Clinical significance

Inflammation of the ethmoidal sinuses, known as ethmoiditis, can occur as a result of infection, allergy, or autoimmune diseases. Symptoms may include nasal congestion, pain between the eyes, and loss of smell. Treatment typically involves antibiotics, nasal decongestants, and sometimes surgery.

See also

• Paranasal sinuses
• Sinusitis
• Ethmoid bone
• Nose
• Eye

References

Ethmoidal sinus Resources
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